PVC Film Research Articles

Synthesis and application of eleostearic acid based plasticizer

This study reports the synthesis of a kind of biomass-based plasticizer: epoxy eleostearic acid catechol ester (EEAE), originating from biomass resources eleostearic acid and catechol by way of esterification and epoxidation. Its effect on the plasticization, mechanical properties and migration resistance of poly(vinyl chloride) (PVC) film was investigated. The results showed that epoxy groups were covalently bonded on the branched chains of EEAE and the epoxy groups and ester groups of EEAE formed hydrogen bonds with the α-hydrogen of PVC, which had a better plasticizing effect on PVC than commercial diisobutyl phthalate. When the mass of EEAE increased from 0.2 to 0.8 g in PVC films, the glass transition temperature (T g) decreased from 86.7 to 54°C and the elongation at break of the PVC films increased from 124.24 ± 6.00 to 321.12 ± 6.13%, while the tensile strength decreased from 40.12 ± 1.23 MPa to 19.67 ± 2.33 MPa, which illustrated that EEAE had an efficient plasticizing effect on PVC. The plasticizer showed marginal resistance to volatilization and solvent extraction. The thermal stability and compatibility of PVC films plasticized with EEAE were also improved.

Biosafety devices to control the spread of potentially contaminated dispersion particles. New associated strategies for health environments.

Dental procedures produce a large amount of spatter and aerosols that create concern for the transmission of airborne diseases, such as Covid-19. This study established a methodology with the objective of evaluating new associated strategies to reduce the risk of cross-transmission in a health environment by simulating spread of potentially contaminated dispersion particles (PCDP) in the environment. This crossover study, was conducted in a school clinic environment (4 clinics containing 12 dental chairs each). As a positive control group (without barriers), 12 professionals activated at the same time the turbine of dental drill, for one minute, with a bacterial solution (Lactobacillus casei Shirota, 1.5x108 CFU/mL), which had been added in the cooling reservoir of the dental equipment. In the experimental groups, the professionals made use of; a) an individual biosafety barrier in dentistry (IBBD) which consists of a metal support covered by a disposable PVC film barrier; b) a Mobile Unit of Disinfection by Ultraviolet-C, consisting of 8 UV lamps-C of 95W, of 304μW/cm2 of irradiance each, connected for 15 minutes (UV-C) and; c) the association between the two methods (IBBD + UV-C). In each clinic, 56 Petri dishes containing MRS agar were positioned on the lamps, benches and on the floor. In addition, plates were placed prior to each test (negative control group) and plates were also placed in the corridor that connects the four clinics. In the groups without barrier and IBBD + UV-C the passive air microorganisms in Petri dishes was also evaluated at times of 30, 60, 90 and 120 minutes after the end of the dental's drill activation. The mean (standard deviation) of CFU of L. casei Shirota for the positive control group was 3905 (1521), while in the experimental groups the mean using the IBBD was 940 (466) CFU, establishing a reduction on average, of 75% (p<0.0001). For the UV-C group, the mean was 260 (309) CFU and the association of the use of IBBD + UV-C promoted an overall average count of 152 (257) CFU, establishing a reduction on average of 93% and 96%, respectively (p<0.0001). Considering these results and the study model used, the individual biosafety barrier associated with UV-C technology showed to be efficient strategies to reduce the dispersion of bioaerosols generated in an environment with high rate of PCDP generation and may be an alternative for the improvement of biosafety in different healthy environment.

The mechanical degradation mechanism of CFRP/Al double-lap bolted joints (with and without corrosion protections) after seawater ageing

Dual effects of environmental and mechanical loadings complicate mechanical behaviors of CFRP/Al joints, which significantly influence their reliable applications. This paper aims to reveal the mechanical degradation mechanism of CFRP/Al double-lap bolted joints with two kinds of corrosion protections (epoxy coating and PVC film) after seawater aging. All joints were exposed in the artificial marine environment with 3.5% sodium chloride solution at 30 ℃ for 0–8 weeks. Double-lap bearing tests and material analysis experiments with micro-CT and step profiler were conducted to reveal the environmental damage and mechanical degradation mechanism of aged joints. The results show that compared to epoxy coating, PVC film can better suppress galvanic-corrosion but degrades more the load-bearing capacity of joints due to the reduction of friction coefficient between CFRP and Al. The failure modes of unprotected joints and joints protected with PVC film evolve both from squeezing/shear-out to delamination/cleavage with ageing time, while squeezing is almost the only primary failure mode of joints protected with epoxy-coating. Joints protected with PVC films show more serious failure damage than the ones protected with epoxy-coating, since the epoxy-coating has better protective effect on CFRP laminate and therefore inhibits the deterioration of damage.

On the Mechanical and Electrical Properties of the Composite Structure of PVC Membrane and Thin-Film Battery under Biaxial Tension

This paper aims to study the mechanical and electrical properties of the composite structure of PVC film and film cell under biaxial tension. The saddle PVC membrane structure with thin-film battery was obtained by biaxial tensile tests carried out on the composite structure along the fiber direction and at an angle of 45 degrees to the fiber, respectively. The deformation of the film cell and PVC membrane materials was tested using digital image technology, and the voltage of the film cell was tested using a multimeter. The results showed that the tensile strain occurred in both membrane batteries and PVC membrane at different loading levels, and the former was always less than the latter. At a tensile load with the ultimate load ratio of 60%, it was only at the film cell’s outer edge that the stripping occurred. Under the illumination of a stable light source, the film cell voltage decreased gradually with the increasing tensile load. No more than 10% of the cell voltage drop occurred when the membrane material, the principal tensile strain of the cell, and the cell’s expansion area ratio were less than 3.1%, 2.8%, and 1.03, respectively. The experimental results show that the film cell can be applied to the saddle membrane structure by controlling the appropriate load.

Pitting corrosion and crevice corrosion behaviors of titanium alloy overlapped with aluminized PVC film in neutral salt spray

Abstract This paper presents a research on the corrosion behavior of Ti-15-3 alloy overlapped with aluminized PVC film in salt spray. It was found that severe corrosion occurred on aluminized PVC film in the coupled regions because of crevice corrosion and/or galvanic corrosion whereas Ti-15-3 alloy in the coupled regions experienced minor corrosion. Scanning electron microscope and Energy-dispersive X-ray spectroscopy analyses demonstrated the corrosion products adhered to the surface of Ti-15-3 alloy within the crevice. To evaluate the effect of aluminized PVC film on the crevice corrosion of Ti-15-3 alloy in salt spray condition, it is necessary to compare with the corrosion resistance of Ti-15-3 overlapped with polytetrafluoroethylene (PTFE) in different neutral salt spray. Further, the tests were performed by electrochemical impedance spectroscopy and potentiodynamic polarization. Combining the graphical model, an in-depth understanding of the crevice and galvanic corrosion mechanism of Ti-15-3 alloy overlapped with aluminized PVC film has been revealed.

Manufacture of non-thrombogenic polymer surfaces by gamma irradiation to induce simultaneous grafting and heparinization of thin PVC films

Investigations regarding alternative methods for producing polymeric materials with hydrophilic properties have increased considerably. In this context, polymeric biomaterials with hemocompatible surface properties have been successfully obtained by grafting hydrophilic monomers onto commercial polymer films by simultaneous irradiation processes. In this study, simultaneous irradiation and grafting were used to produce a copolymer PVC-co-DMAEMA-co-heparin with hemocompatible surface properties. Characterization by FTIR of the graft copolymer indicates that the increase in monomer grafting levels inhibits the bonding sites to heparin. FTIR-PAS analyses of the graft copolymers showed that the highest graft levels were obtained for the irradiated samples containing 45% of monomer. Heparin, however, could only be detected in the irradiated samples containing 30% of DMAEMA. The analysis of the micrographs, on the other hand, showed that increasing the monomer concentration enhances surface roughness of the graft copolymers. Roughness however decreased with heparin addition. It was possible to verify that an excess of surface roughness of the graft copolymers inhibits anticoagulant properties of heparin, triggering thrombus formation. Platelet adhesion, on its turn, was not significantly affected by the presence of heparin when PVC-co-DMAEMA and PVC-co-DMAEMA-co-heparin, obtained from the systems containing 45% of monomer, are compared. The addition of heparin in the systems containing 30% of DMAEMA resulted in fewer thrombogenic surfaces.

Optical properties of PVC composite modified during light exposure to give high absorption enhancement

Modified poly(vinyl chloride) (PVC) films have been synthesized with a simple superficial deposition by using solvent tetrahydrofuran (THF). These modified films were prepared by a casting method over a glass substrate. Different types of the amino group with a suitable aromatic aldehyde as an organic compound, which were reacted to prepare different PVC composite films. These films have been analyzed by UV-Visible spectra. The percentage of PVC was (0.25 g) with (0.05 g) amino group and aromatic aldehyde combinedly, then dissolved with (8 ml) of tetrahydrofuran (THF) at room temperature (300 K). The optical properties as absorption coefficient, reflectance, transmittance, skin depth, energy gap, refractive index, extinction coefficient, and urbach energy were studied. The transmittance value of the pure PVC film was 1.0 then declined gradually after dispersion with the compounds to the lowest value at 0.1, the reflectance also decreased. The energy gap for direct allowed decreased from (5.1 to 2.9 eV), and indirect transition decreased also from (5.0 to 2.8 eV), this behavior indicate that the modified films become work as semi-crystalline compounds toward the light. In tailoring, the optical properties, and urbach energy have been increased after mixed with PVC polymer. The scattering energy (Ed) and the effective single oscillator (Eo), were decreased. In a similar manner the dielectric constant high frequency (ε∞) and effective mass (Nm*), of dielectric constants were increased for PVC modified films. The PVC modified films are appropriate for anti-reflected coating while being good suitable in high refractive lenses and photovoltaic cells applications.

Properties of fish myofibrillar protein film: effect of glycerol-sorbitol combinations.

The effects of glycerol-sorbitol combinations (G/S) at different ratios (0: 2, 0.5: 1.5, 1: 1, 1.5: 0.5, and 2: 0, w/w) on the properties of fish myofibrillar protein (FMP) films were evaluated and then compared to those of synthetic wrap film (polyvinyl chloride; PVC). The thickness of FMP films plasticized with G/S at various ratios was in the range of 0.012 to 0.013mm and transparency values were 3.81-3.86. Significant increases in elongation at break (65.81-116.53%), oxygen permeability (12.83-36.11 cm3/m2/day), and water vapour permeability (0.27-1.43 × 10-10g/m/s/Pa) were observed when the proportion of glycerol increased (P < 0.05). No significant difference was observed in a* and b* values, compared to the PVC film. However, tensile strength values (12.56-3.52MPa) decreased when the proportion of glycerol increased (P < 0.05). A change in the amount of sorbitol influenced the thermal properties of FMP films. According to their properties, up to 50% of glycerol could be substituted for sorbitol in order to enhance the strength, barrier, and thermal properties of the FMP films.

Enhancement of flame retardancy and physical property for poly(vinyl chloride) having renewable cardanol-based self-polymerizable phosphonate under heat treatment process

Considering the drawbacks of conventional plasticizers used for poly(vinyl chloride) (PVC), it is imperative to develop bio-based additives. Herein, bis(cardanyl) phenylphosphonate (CP), which is not only a flame retardant but also a plasticizer for PVC, was designed and synthesized from cardanol. The flame retardancy and flexibility of PVC improved with an increase in the CP content (wt%) because of the presence of the phosphonate group and long alkyl chain of CP, respectively. Meanwhile, we found that CP can be self-polymerized by heat treatment and that the cross-linked network of CP leads to an additional enhancement in the flame retardancy of PVC by inducing anti-dripping property and the formation of graphitized char layer. Also, the flexibility of the PVC films was preserved without deteriorating its transparency. CP with self-polymerization properties is a promising candidate to improve the thermal stability, flame retardancy, and flexibility of PVC while maintaining its transparency and migration stability.

Functional potential and food safety of fresh-cut ‘Paluma’ guava under edible coatings

Guava is a fruit rich in antioxidants and its value can be enhanced by fresh-cut processing, which increases convenience for consumption. The objective of this study was to evaluate the changes in bioactive compounds, total antioxidant activity (TAA) and microbial quality in slices of fresh-cut (FC) ‘Paluma’ guava coated with chitosan at 2% (Q), calcium chloride at 1% (CC), calcium chloride at 1% + sodium alginate at 1% (CC + A), calcium chloride at 1% + chitosan at 2% (CC + Q), and control (T - without coating). Coated slices were packed in trays, wrapped with PVC film and kept at 3 ± 1 °C and 75 ± 4% RH for 12 days and evaluated for ascorbic acid, lycopene, β-carotene, total extractable polyphenols (TEP), and TAA by ABTS+- and DPPH . Ascorbic acid content of slices did not differ by coatings, but TEP was higher in slices coated with Q. The TAA by DPPH was higher in slices coated with Q, however, by ABTS+- it was higher in those coated with Q, CC and CC + Q. No thermotolerant coliforms or Salmonella were detected in FC guava from any treatment. However, slices coated with Q showed the lowest counts of total coliforms and molds and yeasts. Therefore, the application of Q coating provided microbiological safety to FC guava, still maintaining the levels of bioactive compounds and TAA superior to the control slices, which can characterize this as a healthy FC product, with superior functional potential.

Biobased Plasticizers from Tartaric Acid: Synthesis and Effect of Alkyl Chain Length on the Properties of Poly(vinyl chloride).

A series of tartaric acid (TA) esters with different side chain lengths [dibutyl TA esters (DBTAE)-Cn], as plasticizers for poly(vinyl chloride) (PVC), is herein reported. Their structures have been fully characterized using proton nuclear magnetic resonance and Fourier-transform infrared spectroscopy. Their compatibility and plasticizing effect for soft PVC were evaluated using thermogravimetric analysis, dynamic mechanical analysis, tensile testing, and migration testing. The results showed that all these TA esters exhibit good plasticizing performance. At a concentration of 30 phr in PVC, the best results for the plasticizing effect, in terms of glass transition temperature reduction and elongation at break, were achieved when the ester DBTAE-C4 was used. However, the longer side chains of these esters improved the thermal stability of soft PVC blends yet exacerbated the migration behavior of these esters from PVC films in n-hexane. The properties of the plasticized PVC blends depended on the structural features of DBTAE-Cn. The plasticizing performances of the esters DBTAE-C1 and DBTAE-C4 rivaled that of dioctyl phthalate (DOP), suggesting that they have the potential to replace DOP in soft PVC materials.

Different types of packaging influence sensory profile of Canastra artisanal cheese

Artisanal cheeses have been highly appreciated by consumers, and have an important social, economic and cultural significance in Brazil. However, problems related to the chemical and sensory changes resulted from the microorganisms metabolism during the storage have been pointed. Product shelf-life and quality can be influenced by the product packaging. Thus, this work aimed to evaluate the influence of different types of packaging on the sensory profile of Canastra artisanal minas cheese; and associate its sensory profile to the main bacterial groups present in the cheeses under each type of packaging. Cheeses from a same batch with 14 days of maturation were packed in VACUUM, NYLON MESH, BUTTER PAPER, PVC FILM and without packaging until 22 days of maturation. Cheese`s Sensory profile and Microbial diversity were evaluated. Packaging used in Minas artisanal Canastra cheese maturation promoted different sensory attributes. PREMAT and BUTTER PAPER were the preferred samples, followed by the cheeses submitted to VACUUM PACKAGING, NYLON MESH, and PVC FILM. POSTMAT was less preferred. However, all samples had good acceptances. attributes such as sour flavor, mild flavor, butter flavor, farm flavor, salty, cured, compacted and soft drove the PREMAT acceptance. Moreover, this sample presented Lactococcus sp (OTU24), Corynebacterium sp (OTU25), Lactobacillus plantarum (OTU26), Streptococcus sp (OTU27), Lactobacillus plantarum (OTU28), Lactobacillus brevis (OTU22) and Lactobacillus casei (OTU13). Although the different sensory profile provided by the different packages, everyone showed to have market potential. The results of this study provide important information for the artisanal cheese producers focusing on product quality improvement and conservation.

Structural, Electrical and Optical Properties of PVC/ZnTe Nanocomposite Thin Films

ZnTe nanoparticles (NPs) were synthesized using hydrothermal method and then were dispersed in poly(vinyl-chloride) (PVC) to prepare hybrid PVC/ZnTe nanocomposite thin films which were deposited on glass substrates by the dip coating technique in the aim to be used in photoelectronic applications. Structural, optical and electrical properties of films were investigated by different techniques. XRD analysis revealed that synthesized ZnTe NPs have a cubic structure and a nanoscale size,while pure PVC films have a weak degree of crystallinity and exhibit a broad diffraction peak at low angles. The PVC/ZnTe nanocomposite thin films display an intense diffraction peak corresponding to the plane (220) which indicates a preferred orientation of ZnTe nanocystallites along crystallographic axis [220]. This texture was also showed by the atomic force microscopy micrographs.The analysis by FT-IR and Raman vibrational spectroscopies confirmed the incorporation of ZnTe NPs in the PVC matrix.The ZnTe/PVC nanocomposites thin films have an optical transparency over 80% in the visible range and an optical gap close to 4.07 eV. Discrepancies with respect to the gap of pure PVC (red shift) and bulk ZnTe (blue shift) are due to the effect of the interaction between the ZnTe NPs and the PVC matrixand also to the nanometric size of the ZnTe NPs. Photoluminescence (PL) spectra showed an enhanced blue emission at 466 nm,a green emissionat 522 nm and a strong red emission at 686 nm. Thus the incorporation of oriented ZnTe NPs induced a new optical behavior of the PVC polymer matrix. Electrical measurements indicate a decrease of electrical resistivity of PVC/ZnTe nanocompositesas ZnTe NPs concentration increases.

The Effect of a Zinc-Containing Additive on the Properties of PVC Compounds

Polymeric materials that undergo degradation under the influence of biological media have attracted widespread attention in recent decades. This is due to the ability to eliminate the negative impact on the environment, gradually reducing the scale of plastic waste pollution. At the same time, it remains relevant to ensure the necessary performance characteristics of products for a certain period of use. An important direction in the field of biodegradable composite compositions is the development of nontoxic additives in order to ensure their safe interaction with biological media. In this regard, a method has been developed for the joint production of a new nontoxic plasticizer decyl phenoxyethyl adipate and a biocidal additive of zinc decyl adipate. The effect of the obtained additives on the biodegradation of PVC film samples under natural conditions was studied. The period of biocidal action of zinc compound formed in situ in an amount of 0.3% in the composition of PVC films using the developed plasticizer was determined.

Highly selective and robust nanocomposite-based sensors for potassium ions detection

Ion-selective electrodes are employed in technological important fields, such as medical diagnosis, or water quality evaluation. Plasticized polymeric membranes containing ionophores are typically used in these devices. However, the low mechanical hardness and limited robustness of these electrodes combined with their low selectivity limit their use in high precision applications. In the present work, PVC-functionalised silica nanoparticles incorporated in a plasticized PVC film have been integrated into ion sensors for the first time applied to the detection of K+ in solution. This approach was used for the design of highly specific and mechanically robust systems using a fluidic chamber. The device presented a hardness in the range of 5.2 GPa, being 2 orders of magnitude higher than the one reported for plasticized PVC (0.059 GPa), and could measure the concentration of K+ with high specificity when compared to Ca2+ and Na+ ions compared to the conventional approach. The interactions of the sensing films with the ions in solution were systematically studied for different degrees of PVC functionalisation to allow the rational design of a robust and selective sensor. The final device exhibited one of the lowest signal drift ever reported, with 1.3 µV h−1. The system operated under fluid pressure and shear stress conditions of 45 mbar for at least 8 h while the control experiment, fabricated using the conventional composition without nanoparticles showed a significantly higher noise (circa 115.6 µV h−1) and degraded after 4 h of continuous measurements. The sensors here reported could also be used for the accurate determination of the concentration of K+ inside complex mixtures of ions such as simulated body fluids and human serum, leading to a plethora of applications in healthcare for the diagnosis and monitoring of diseases.

Synthesis and application of an environmental epoxy plasticizer with phthalate‐like structure based on tung oil and cardanol for poly(vinyl chloride)

AbstractAn epoxidized cardanol tungoleate (ECT) based on tung oil and cardanol was synthesized through esterification and epoxidation. The chemical structure of the compound was verified by Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (1H‐NMR). The plasticizing effects of ECT as the main plasticizer in poly(vinyl chloride) (PVC) was studied and compared with the commercial plasticizer dioctyl phthalate (DOP). The thermal migration stabilities, the thermal degradation process and the mechanical properties of PVC samples and the plasticization mechanism of ECT for PVC were investigated through the use of volatility, extraction, discoloration, and tensile tests as well as thermal gravity analysis (TGA), TGA–FTIR analysis, electronic universal testing machine and dynamic mechanical analysis (DMA). Compared with DOP, the ECT plasticized PVC can exhibits better thermal stability, more excellent tensile strength (17.28 MPa) and higher stretchability (629.41%), which is 1161% higher than DOP (1.37 MPa) plasticized PVC film. In addition, the migration resistance and volatility stability of ECT are much better than DOP. Therefore, this fully bio‐based plasticizer based on tung oil and cardanol is a promising alternative plasticizer for PVC and may be an excellent phthalate substitute from the perspective of human health and sustainable development.

Photostabilization of Poly(vinyl chloride) Films Blended with Organotin Complexes of Mefenamic Acid for Outdoor Applications

This study develops a process for enhancing the photostabilization of PVC films blended with a low concentration of mefenamate–tin complex. One tri-substituted and three di-substituted organotin complexes containing mefenamate unit are synthesized, and their chemical structures are established. The reactions of mefenamic acid and a number of substituted tin chlorides gave the corresponding tin complexes in 70–77% yields. Tin complexes were blended with PVC and thin films. The effect of the addition of additives against long-term irradiation (290–400 nm, 300 h) is also tested. Changes in the infrared spectra, weight, and surface of the PVC blends due to irradiation are examined and analyzed. Any damage to the PVC surface and its chemical degradation level are noticeably low in the presence of additives. Minimal photodegradation levels and surface changes of the irradiated PVC films are observed when the triphenyltin complex is used. Such a complex is highly aromatic and can act as an ultraviolet irradiation absorber and a scavenger for hydrogen chloride and radicals produced due to the photooxidation and photoirradiation of PVC films.

Effectiveness of different packaging films and trays on mushrooms ( Agaricus bisporus ) subjected to simulated transportation conditions at different vibration frequencies

This study aimed to determine the different vibration frequencies (4, 8, 12, and 16 Hz) and packaging trays and films (Polypropylene trays + microperforated films (MP) and Polystyrene foam trays + polyvinyl chloride stretch films (PVC)) effects on mushroom quality. The quality of the mushrooms in MP was reduced with the increment in the frequency, whereas the effect of the frequency was only detrimental in the mushrooms packaged with PVC at 16 Hz. Oxygen concentration reached the equilibrium state at the level of 15% in PVC and 9% in MP groups. The whiteness index of mushrooms in MP was between 25 and 40, whereas it was around 20–30 in PVC films. However, changes in electrolyte leakage, pH, and hardness were minimal in the mushrooms packaged with PVC. As a result, PVC stretch films reduced the effect of transport frequencies, however, the optimal gas concentrations for mushrooms were only achieved using MP films. PRACTICAL APPLICATIONS: In this study, effects of different packaging films, and trays were studied on mushrooms (Agaricus bisporus) which were subjected to simulated transportation conditions at different vibration frequencies. Foam trays with PVC films reduced the effect of transportation damage. Transportation damage in MP packages observed to be increased with the rise in the frequency. MP films helped to achieve the desired gas composition inside the packages.

Synthesis, Characterization, scaling up and use of Calcium Carbonate Nanoparticles to prepare nanoporous PVC film

CaCO3 nanoparticles were synthesized from CaCl2 and Na2CO3 using a new, fast and straightforward technique. Factors affecting on the particle size such as the concentration of Ca2+ and CO32-, PEG weight dissolved in Ca2+ solution, flow rate, temperature, media type, PEG weight dissolved in the used medium, the concentration of CO32-, stirring speed, medium volume and additive dissolved within Ca2+ solution were investigated. The obtained particles were characterized by SEM, XRD, EDS, IR and TGA. The characterization clarified that the particles prepared were spherical with a size range of 19-30 nm, ultra-pure, and calcite. Moreover, the preparation system was redesigned to be a continuous preparation system. The histogram showed that the CaCO3 nanoparticles obtained were homogenous in size (30 nm). Finally, the obtained nanoparticles were utilized in the preparation of nanoporous PVC film with pores size range 80-120nm

Biodegradation of polyvinyl chloride by Mucor s.p. and Penicillium s.p. isolated from soil

PVC is one of the most widely used plastics today and the one that produces the most waste. In recent years, microorganisms capable of degrading it have been reported, most of which come from environments in which PVC is accumulated. The aim of this work was to study the degradation of PVC without plasticizer, from fungi isolated from a soil sample contaminated with PVC resin. The fungi were isolated and morphologically characterized, 30 morphospecies were obtained, 8 were chosen to undergo preliminary tests in a medium whose only carbon source was a PVC film. Growth curves of the two isolates with better results were made and their molecular identification showed that they corresponded to Penicillium sp. and Mucor sp., the latter gained biomass from PVC and in both cases, the films showed visible changes, which were supported by infrared spectra. Although the results shown in this article are preliminary, they open the door to new forms of PVC waste degradation that are very persistent.