Polyvinyl Alcohol Resin Research Articles

Cyclic desorption based efficacy of polyvinyl alcohol-chitosan variant resins for multi heavy-metal removal

The simultaneous removal of Cu, Pb and Fe from water bodies has been targeted in this work with polyvinyl alcohol (PVA) and chitosan (low, medium, and high molecular weight) derivative and with cyclic desorption efficacy target. For a varied range of adsorbent loading (0.2–2 g L−1), initial concentration (187.7–563.1 mg L−1 for Cu, 5.2–15.6 mg L−1 for Pb, and 61.85–185.55 mg L−1 for Fe), and resin contact time (5 to 720 min), batch adsorption-desorption studies were conducted. After first adsorption-desorption cycle, the optimum absorption capacity was 6.85 mg g−1 for Pb, 243.90 mg g−1 for Cu, and 87.72 mg g−1 for Fe for the high molecular weight chitosan grafted polyvinyl alcohol resin (HCSPVA). The alternate kinetic and equilibrium models were analyzed along with the interaction mechanism between metal ions and functional groups. The cyclic desorption studies were carried out with simple eluent systems such as HCl, HNO3, H2SO4, KOH, and NaOH. The experiments revealed that the HCSPVA derivative has been an impressive, reusable, and effective sorbent for the mitigation of Pb, Fe, and Cu in complex wastewater systems. This is due to its easy synthesis, excellent adsorption capacity, quick sorption rate, and remarkable regeneration capabilities.

Preparation of High Performance Lithium‐Ion Battery Separators by Double‐Needle Electrospinning

AbstractTraditional polyolefin separators suffer from poor heat resistance and wettability with electrolyte, which leads to compromised safety and electrical properties of lithium‐ion batteries. Polyvinylidene fluoride (PVDF) has high thermal stability and good chemical stability, but its high crystallinity leads to low ionic conductivity. In order to solve these problems, polyvinyl alcohol (PVA) resin was introduced in this paper, and the PVDF/PVA composite separator was prepared by double‐needle electrospinning. The introduction of PVA resin improved its mechanical properties and electrolyte wettability, and ionic conductivity after assembly into a battery. Double‐needle electrospinning process is simple and can preserve the surface properties of fibers, and the prepared composite separator had a high porosity and electrolyte uptake. The composite separator has an ionic conductivity of 2.454 mS ⋅ cm−1, a high capacity retention rate of 97.5 % after 100 charge and discharge cycles, and a capacity retention rate of 86.8 % under 2 C high‐rate discharge. The results show that the battery assembled with PVDF/PVA composite separator has high safety performance and electrical performance, and has application prospects.

Research Progress of Polyvinyl Alcohol Water-Resistant Film Materials.

Polyvinyl alcohol (PVA) is one of the few biodegradable synthetic resins from petroleum-based sources that can alleviate white pollution in the environment. PVA film materials have excellent properties, such as high barrier, high transparency, high toughness, biocompatibility, and adjustable water solubility. However, due to the presence of hydrophilic hydroxyl groups in the side chain of PVA resin, when PVA film is placed in a humid or water environment, swelling or even dissolution will occur, which greatly limits its application. Therefore, it is necessary to modify PVA resin to improve water resistance without reducing other properties and can also impart various functionalities to it, thereby widening the application range. This paper reviews the water-resistant modification methods of polyvinyl alcohol and the application of water-resistant films and provides an outlook on the development trend of PVA water-resistant films.

Crosslinking effect on polyvinyl alcohol resin for barrier properties of barrier biaxial orientation films

A novel barrier chemical coating was formulated and developed by using an organic and inorganic sol-gel process. In this work, a hybrid solution was prepared using different percentages of cross-linker into a polyvinyl alcohol and Tetraethyl orthosilicate to improve the barrier properties of biaxial oriented polypropylene (BOPP) films. The TGA results showed that thermal stability had been enhanced after incorporating tetraethyl orthosilicate as inorganic materials. The transparency of coated films showed enhanced e.g. haze percentage, which improved about 12% and gloss properties were for 90 GU. The coated side and plain side COF were measured at about 0.4, COF is an important slip property at the end-use application. After coating, printing properties were checked and found that the thickness and particle size of pigment were uniform and color strength was also suitable for the packaging applications. The oxygen transmission rate (OTR) properties have been improved from 1880 cc/m2/day to 0.9 cc/m2/day compared to a plain film. The water vapor transmission rate (WVTR) properties have been improved from 10 g/m2/day to 5.9 g/m2/day a plain film. The application of the films showed an excellent barrier for bread packed in coated film and checked for nine days. The results showed that micro-organism was reduced by enhancing the barrier properties by applying the coating on film.

The The research to improve the mechanical properties and the water barrier properties of polyvinyl ancol film by graphen oxide

In this study, graphene oxide (GO) is synthesized by a modified Hummers method, Polyvinyl alcohol (PVA) films and PVA/ GO nanocomposite films are prepared by casting stable aqueous mixed solutions. X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM) showed that there were a good compatibility and dispersion of graphene oxide (GO) on PVA matrix. In addition, nanocomposite films reinforced graphene oxide with the content of only 0.6 % phr have had 10.11% higher tensile strength, 12.24 % greater Young modulus, and significantly reduced water permeability during 4 hours of continuous immersion. Nanocomposite films maintained good thermal stability despite being added with graphene oxide, a material that is considered to have low thermal stability that easily decomposes below 200 oC, so thermal gravimetric analysis diagram (TGA) of PVA/ GO almost did not show a change compared to the neat PVA film. Initial results show that the efficiency of dispersing and reinforcing graphene oxide material on PVA resins has ameliorated the drawbacks of this polymer and contributed to extending the application of PVA in many areas. This has also reached closer to the goal of cleaning the environment by replacing non-biodegradable polymer sources with more friendly polymers.

Sub-kilogram-scale synthesis of highly dispersible zirconia nanoparticles for hybrid optical resins

Abstract We report the synthesis of highly dispersible zirconia (ZrO2) nanoparticles in sub-kilogram-scale by hydrothermal process coupled with alkaline hydrogen peroxide (AHP) treatment, with detailed studies on the effects of experimental parameters. Under optimized experimental condition, which was hydrothermal reaction at 110 °C for 6 h with mole ratio of sodium hydrate to zirconium carbonate basic in reactants as 2.3, pure-phase cubic-ZrO2 nanoparticles are obtained. Followed by AHP treatment of the ZrO2 nanoparticles at 50 °C for 5 h in 0.4 M hydrogen peroxide and 4 M sodium hydrate, the dispersibility of ZrO2 nanoparticles in aqueous suspension was enhanced due to the introduced Zr-OH groups on the surface. ZrO2 nanodispersion with solid content of 37 wt% in aqueous solution exhibited a uniform hydrodynamic size of 14.15 ± 5.834 nm and was stable for over six months without significant aggregates. Transparent hybrid optical resins with tunable refractive index in the range of 1.55–1.71 were prepared by solution blending method using ZrO2 nanoparticles as composite fillers in polyvinyl alcohol substrate. Compared with pure polyvinyl alcohol resin, the hybrid resin exhibits significant enhanced mechanical properties. Sub-kilogram-scale preparation of highly aqueous dispersible ZrO2 nanoparticles offers possibility for practical applications.

Introduction of two polyvinyl alcohol resins for efficient solid support Cu‐catalyzed N‐arylation of α‐aminoacids with aryl halides in aqueous media

ABSTRACTIn this article, two polyvinyl alcohol (PVA)‐based resins were prepared by crosslinking of epoxidized PVA‐chains using of 4‐(4‐aminobenzyl)benzenamine as a crosslinker and polymerization of acrylated PVA chains in the another approach. The prepared PVA resins showed well hydrophilic and swelling properties in various organic solvents, which are used in solid‐phase organic synthesis (SPOS). Swelling properties of these resins were examined in dimethylformamide, tetrahydrofuran, water, ethanol, methanol, dichloromethane, and dioxane. Furthermore, the both resins were characterized by FTIR and 1H‐NMR and their properties such as epoxy equivalent weight (EEW) of epoxidized PVA and density of the resins were determined by analytical methods. Then, α‐amino acids such as L‐aspartic acid, L‐leucine, L‐alanine, L‐serine, L‐valine, L‐threonine, and L‐tyrosine were immobilized on both resins through esterification reaction between these α‐amino acids with the present hydroxyl groups on PVA resines, to carry out their solid‐phase N‐arylation reaction in the presence of CuI as a catalyst in milder and greener conditions than free resin protocols. Hydrolysis of the correponding N‐arylated α‐amino acids immobilized on the resins gave the N‐arylated α‐amino acids in high to excellent yields. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47597.

Dispersion of carbon nanofibers modified with polymer colloids to enhance mechanical properties of PVA nanocomposite film

Polymer colloids have been used to modify the surface of carbon nanofibers (CNFs), to enhance the mechanical properties of polyvinyl alcohol (PVA) resin/CNF nanocomposite materials prepared by the solution casting method. However, the CNFs showed uneven dispersal within, and adhesion to, the PVA resin.In this study, the colloidal technique using polymer particles was applied to achieve more uniform dispersion of CNFs in PVA resin. This results in the polymeric particles functioning as spacers, thereby inhibiting CNF clustering; and in hydrogen bonding between PVA and polymer particles, thereby increasing surface adhesion between CNF and PVA. Polymer colloids prepared by the emulsion polymerization of styrene and N-vinylacetamide showed particularly notable enhancements of dispersion and surface adhesion in the composites. Consequently, PVA composite film containing uniformly distributed CNFs showed significantly enhanced tensile strength and modulus even at CNF mass fraction of 5.0 wt%.

Ultrathin wood laminae—polyvinyl alcohol biodegradable composites

Novel polyvinyl alcohol (PVOH) based biodegradable composites were prepared by a hand lay‐up process using ultrathin beech laminae cut by a specialized planer machine, and the resulting materials were thermo‐mechanically characterized. Density measured showed how the adopted procedure led to laminates having a high porosity degree (about 50% by volume) and an elevated wood concentration (about 80% by weight). In fact, because the wood fibers were perfectly cut (not pressed and abraded), wood porosity was partially filled by the PVOH resin, as documented by field emission scanning electron microscope (FESEM) micrographs. The occlusion of wood porosity by the PVOH matrix resulted to be beneficial for the tensile mechanical properties of the composites. In fact, quasi‐static tensile tests and DMTA analysis revealed how the stiffness (E, E′) and strength (σb) values of the composites both along longitudinal and transversal directions were considerably higher than those of the constituents. On the other hand, the values of the specific energy adsorbed under impact conditions by the composites samples were rather low, if compared to the neat matrix. POLYM. COMPOS., 39:1116–1124, 2018. © 2016 Society of Plastics Engineers

Fabrication and Performance Evaluation of Cellulose Nanofiber/PVA Composite Films

The mechanical strength of cellulose nanofiber-reinforced polyvinyl alcohol (PVA) composite films was evaluated by means of tensile test to explore the effect of fiber content and processing condition to the mechanical strength. Cellulose nanofibers were mixed with PVA resin at different weight ratios of 10, 20, 30, 40, 50, 60, 70, 80 and 90wt% and tensile tests were done on the composite films with thickness of 0.08~0.11mm. A set of samples for every respective weight ratio was hot-pressed at 180°C and 10MPa pressure and tensile tests were conducted to compare the failure behavior of the hot-pressed and the non hot-pressed composite films. The results showed that hot-pressed composite films exhibit a linear stress-strain curve as compared to the non-hot pressed composite films, which exhibited more ductile characteristic. For non hot-pressed specimens, tensile strength showed almost no significant increase from 0wt% to 50wt%, and finally a sudden increase especially from 50wt% to 70wt% fiber content where the highest average value recorded was 149MPa at 70wt%. As for hot-pressed composite films, the highest value of 167MPa at 60wt% was obtained without significant pattern of reinforcement effect with the change of nanofiber content. The reinforcement effect derived from cellulose nanofiber has shown favorable results which indicated an increase in the composite tensile strength of about 33.3% from pure PVA specimen, and hot-press process, though has reduced the ductile characteristics of the composite films, has increased tensile strength of the specimens up to 22% as compared to pure PVA specimens.

Nanofibrillated Cellulose and Copper Nanoparticles Embedded in Polyvinyl Alcohol Films for Antimicrobial Applications.

Our long-term goal is to develop a hybrid cellulose-copper nanoparticle material as a functional nanofiller to be incorporated in thermoplastic resins for efficiently improving their antimicrobial properties. In this study, copper nanoparticles were first synthesized through chemical reduction of cupric ions on TEMPO nanofibrillated cellulose (TNFC) template using borohydride as a copper reducing agent. The resulting hybrid material was embedded into a polyvinyl alcohol (PVA) matrix using a solvent casting method. The morphology of TNFC-copper nanoparticles was analyzed by transmission electron microscopy (TEM); spherical copper nanoparticles with average size of 9.2 ± 2.0 nm were determined. Thermogravimetric analysis and antimicrobial performance of the films were evaluated. Slight variations in thermal properties between the nanocomposite films and PVA resin were observed. Antimicrobial analysis demonstrated that one-week exposure of nonpathogenic Escherichia coli DH5α to the nanocomposite films results in up to 5-log microbial reduction.

Preparation of polyvinyl alcohol-matrix z-pins and tests of their piercing properties

In this study, we developed a molding process for a new type of z-pin applicable to C/C composites. Polyvinyl alcohol (PVA) was adopted as the matrix of z-pins because it has few solid residues when subjected to an inert high-temperature environment. A highly concentrated PVA aqueous solution was prepared to impregnate the carbon fiber bundle. The draw forming method from small-hole-cavity dies was used to mold the PVA-matrix z-pins. Four z-pins with different resin content were made by four dies with the cavity diameters of 0.50, 0.60, 0.70 and 0.80 mm, respectively. The piercing processes and properties of the z-pins were analyzed by piercing them into carbon fiber laminated fabrics. The results showed that the measured value of the PVA resin volume content of the z-pins was slightly larger than the theoretical value. And the z-pin prepared in the molding die with a cavity diameter of 0.70 mm (P7) exhibited the best piercing property with a resin volume content of 45.6%. The maximum compressive stress in the whole piercing process of P7 was the lowest as compared to the z-pins molded by the other dies, and little damage to the piercing tip of P7 was observed after the penetration. In addition, the z-pins can fully pierce laminated fabrics with a thickness of 9 mm.

Improvement of Mechanical Properties in Bamboo Maleic Anhydride Grafted Polypropylene/Polypropylene Composite Enhanced with Resin Impregnation Method

Previously bamboo fiber reinforced PP composites was manufactures using Polyvinyl Alcohol (PVA) and Phenolic resin for Resin impregnated bamboo fiber with polypropylene (PP). Using 40% weight fraction of bamboo fiber in PP matrix, PVA impregnated composites with mean flexural and tensile strength 10% higher than untreated were produced. The PVA treatment improved the tensile and flexural strength of bamboo/PP composites and increased water absorption ratio. Next, matrix modified with Maleic Anhydride grafted Polypropylene (MAPP). For matrix PP mixed with 10% of MAPP. In this study, resin impregnation method dose not make different for mechanical properties of composites. Untreated and PVA, Phnolic resin impregnated mechanical properties was almost same. However; it can decreased water absorption PVA resin absorption bamboo fiber composites.

Development of the CNT Composite Conductive Resin Using Nano-Dispersion Process

We found that carbon-nanotubes(CNTs) can be nano-dispersed without specific processes. In this study, we tried to prepare conductive composite resins using the CNTs dispersion technique.1. IntroductionCNTs are very good to thermal conductivity, electrical conductivity, and molecular adsorption. It is expected when composite resin and CNTs, to become new functional composite materials. However, The CNTs would form aggregates with intermolecular forces of each other. Aggregated CNTs is not be able to exert the original characteristics. CNTs dispersion technology for acid treatment or the use of surfactants has been reported. However, suppression of re-aggregation is difficult in this technique. Serious problems of cost for manufacture of CNTs remain.We found an effective technique of dispersing nano-scale CNTs [1]. By mixing and stirring the CNTs and an aromatic compound having a specific structure (dispersion medium), CNTs to form a gel having a three-dimensionall network structure. This gel can maintain long time nano-dispersion of CNTs. This effective technique is very simple. We expect a decrease in production costs using this technique.In this study, we tried to prepare conductive composite resins using the CNTs dispersion techniques. A water-soluble resin and a polyester resin were examined. We used an aromatic and polyester resin. And, we used the polyvinyl alcohol (PVA) as a water-soluble resin, and water soluble dispersion medium. Prepared composites were studied by transmission electron microscopy (TEM). Volume resistivity was measured by using four-point probe method.2. ExperimentBenzoyl peroxide was used as curing agent of multi-walled carbon nanotubes (MWNTs). After addition of benzoyl peroxide and MWNTs (1.0-5.0 wt%) in the polyester resin, we repeated the ultrasonic irradiation and mixed with a centrifugal stirrer. In case of water-soluble resin, After addition of water-soluble dispersion medium and MWNTs (1.0-5.0 wt%) in the PVA resin, we repeated the ultrasonic irradiation and mixed with a stirrer. In either case, the resin became a black gel with fluidity. These gels were on the substrate, and dried or cured at room temperature.3. Result and DiscussedTEM images of the composite resin spread were shown in Fig.1. In either case, MWNTs formed network structures in three dimensions. It was succeeded in forming the persistent nano-dispersion of the MWNTs in the resin.Measurement of the volume resistivity of the composite films using four-point probe method is shown in Table I. In the case of polyester, was shown maximum conductivity (MWNTs content 5.0 wt%) 8.15×10-1 [Ω・cm]. In the case of PVA, was shown maximum conductivity (MWNTs content 2.5 wt%) 9.9 [Ω・cm]. It was found that MWNTs formed three-dimensional conductive network structures. For PVA, the addition of 3.0 wt% or more, CNTs brings poor workability so poor.4.

Study of Maleic Anhydride Grafted Polypropylene Effect on Resin Impregnated Bamboo Fiber Polypropylene Composit

Previously, Polyvinyl Alcohol (PVA) and phenolic resin were used for resin impregnated bamboo fiber reinforced PP composites which was manufactures for resin impregnated bamboo fiber with polypropylene (PP). Resin impregnation method can show improvement on tensile strength of fiber. However, to reduce the contact surface area and low inter-facial shear strength (IFSS) between impregnated resin and matrix, using 40% weight fraction of bamboo fiber in PP matrix, PVA impregnated composites with mean flexural and tensile strength 10% higher than untreated composites were produced butphenolic resin impregnated fiber reinforced composition’s mechanical properties were decreased. In this study maleic anhydride grafted polypropylene (MAPP) was used to increase interfacial shear strength between resin impregnated fiber and PP. With 10% MAPP, IFSS between resin impregnated fiber and PP increased more than 100% and reinforced composites. MAPP with untreated, phenolic resin and PVA impregnated cases showed similar mechanical properties. Yet in water absorption test, the PVA treatment with bamboo/PP composites increased water absorption ratio. But with 10% MAPP, matrix PP water absorption ratio decreased like phenolic resin impregnated fiber reinforced composites. 10% MAPP with resin impregnated bamboo fiber reinforced PP composites can improve IFSS, mechanical properties of composite and can decrease water absorption PVA resin impregnated bamboo fiber reinforced composites.

A Composting Study of Membrane-Like Polyvinyl Alcohol Based Resins and Nanocomposites

This study presents the effect of biodegradation, in a composting medium, on properties of membrane-like crosslinked and noncrosslinked polyvinyl alcohol (PVA) and nanocomposites. The composting was carried out for 120 days and the biodegradation of these materials was characterized using various techniques. The changes in the PVA resin and nanocomposite surface topography and microstructure during composting were also characterized. The results from the analyses suggest biodegradation of PVA based materials in compost medium was mainly by enzymes secreted by fungi. The results also indicate that the enzymes degraded the amorphous regions of the specimens first and that the PVA crystallinity played an important role in its biodegradation. The surface roughness of the specimens was seen to increase with composting time as the microbial colonies grew which in turn facilitated further microorganism growth. All specimens broke into small pieces between 90 and 120 days of composting as a result of deep biodegradation. Glyoxal and malonic acid crosslinking decreased the PVA biodegradation rate slightly. Addition of highly crystalline microfibrillated cellulose and naturally occurring halloysite nanotubes in PVA based nanocomposites also decreased the biodegradation rate. The three factors: PVA crystallinity, crosslinking and additives, may be utilized effectively to extend the life of these materials in real life applications.

The long-term effects and influence factors analysis of arterial polyvinyl alcohol resin embolization in the treatment of non-small cell lung cancer

Objective To investigate the long-term effects and risk factors of arterial polyvinyl alcohol resin (PVA) embolization for ⅢB and IV non-small cell lung cancer(NSCLC) patient.Methods 126 patients with 1 B or V NSCLC were performed the perfusion with 5-FU,THP,DDP by PVA grain embolization under fluoroscopic control.All patients were followed up.Kaplan-Meier was used to calculate the survival rate and the median survival time,and Cox regression model was adopted to analyze related risk factors which affected curative effect.Results The median survival time was( 11.78 ± 3.24) months and 1 -,2-year survival rate was 39.1 ％,25.59％ in 126 patients with NSCLC.Cox model analysis showed that of the tumor staging,tumor size,location and combination chemotherapy were all independent risk factors of prognosis (all P ＜ 0.01 ).Conclusion Arterial embolization of PVA for treatment of NSCLC is effective.Tumor size,stage,location and combination chemotherapy are associated with prognosis of NSCLC. Key words: Polyvinyl alcohol resin ; Cancer, non-small cell lung; Embolization

Nano-Imprint Lithography of 100nm Sized Patterns Using Water Soluble PVA, Poly(Vinyl Alcohol), Template

Flexible polyvinyl alcohol (PVA) templates with nano-sized patterns were fabricated by spin coating of PVA resin on silicon master wafer. Since PVA template has enough UV transparency, mechanical strength and thermal durability, it can be used as the template for UV-based and thermal nanoimprint lithography. The replicated patterns on the PVA template were transferred faithfully to the imprinted resin by imprinting lithography. As PVA template was dissolved in water, it was not necessary to deposit a releasing layer on the PVA template surface.

Syntheses and coordination behaviour of 2-( ortho-phosphinophenyl)-functionalised 1,3-dioxolanes and 1,3-dioxanes towards a [(COD)Rh]-complex fragment – models for immobilised complexes

The syntheses are reported of the ether–phosphine ligands: 2-( ortho-diphenylphosphinophenyl)-1,3-dioxolane ( 1a), 2-( ortho-diisopropylphosphinophenyl)-1,3-dioxolane ( 1b), 2-( ortho-diphenylphosphinophenyl)-1,3-dioxane ( 1c), 2-( ortho-diisopropylphosphinophenyl)-1,3-dioxane ( 1d). Their reaction with [(COD)RhCl] 2 (COD: 1,5-cyclooctadiene) results in the formation of the mononuclear complexes: {chloro(COD)[2-( ortho-diphenylphosphinophenyl)-1,3-dioxolane]rhodium(I)} ( 2a), {chloro(COD)[2-( ortho-diisopropylphosphinophenyl)-1,3-dioxolane]rhodium(I)} ( 2b), {chloro(COD)[2-( ortho-diphenylphosphinophenyl)-1,3-dioxane]rhodium(I)} ( 2c), and {chloro(COD)[2-( ortho-diisopropylphosphinophenyl)-1,3-dioxane]rhodium(I)} ( 2d). The chloride ligands of compounds 2a and 2b were abstracted with TlPF 6, with accompanied insertion of an acetal oxygen atom of the ligands 1a and 1b into the coordination sphere of the metal centre, producing {(COD)[η 2- P, O-2-( ortho-diphenylphosphinophenyl)-1,3-dioxolane]rhodium(I)}PF 6 ( 3a∗PF 6) and {(COD)[η 2- P, O-2-( ortho-diisopropylphosphinophenyl)-1,3-dioxolane]rhodium(I)}PF 6 ( 3b∗PF 6). In contrast the dioxane analogues of 3, 3c∗BF 4 and 3d∗BF 4, were formed by reacting the ligands 1c, 1d with [Rh(COD) 2]BF 4. The ligands 1 and the complexes 2 serve as model compounds for their via acetalation to a polyvinylalcohol resin bound analogues. The complexes synthesised were employed as pre-catalysts in the hydroformylation reaction of 1-octene.

Permeation barrier properties of polyethylene/modified blends of polyamide and polyvinylalcohol containers against methanol/gasoline fuels

One commercial grade of polyamide and/or polyvinylalcohol resins were modified by a compatibilizer precursor to make various compositions of modified polyamide (MPA) and/or modified blends of polyamide/polyvinylalcohol (MPAPVA) through reactive extrusion. Good methanol/gasoline fuel permeation resistance together with clearly defined MPAPVA and MPA laminar structures were found on containers blow-molded from the blends of polyethylene PE/MPAPVA and PE/MPA, respectively. The compositions of MPAPVA and MPA resins were found to exhibit a significant influence on the methanol/gasoline fuel permeation resistance and morphology of PE/MPAPVA and PE/MPA containers, respectively. Possible mechanisms are proposed to explain these interesting phenomena.