Polyurethane Blends Research Articles

Effect of Ethylene–Butylacrylate–Glycidyl Methacrylate on Compatibility Properties of Poly (butylene terephthalate)/ Thermoplastic Polyurethane Blends

Effect of Ethylene–Butylacrylate–Glycidyl Methacrylate on Compatibility Properties of Poly (butylene terephthalate)/ Thermoplastic Polyurethane Blends

Experimental investigation on mechanical properties of polyurethane modified bituminous waterproofing membrane

A novel composition of industrial grade bitumen with polymer (polyurethane) additive was synthesized for development of a protective membrane which makes the structure water proof. A series of test were performed on membrane specimens to ascertain their mechanical properties. Blend of Bitumen and polyurethane in form of a membrane or thin film of varying thicknesses were prepared which was then subjected to tensile, elongation, tear, and puncture resistance test in accordance with relevant ASTM codes. Experimental investigations of mechanical properties conducted for development of water proofing membrane have been found to be very helpful in improving the index and structural properties. An optimum mix of both the materials for the membrane development was obtained by analyzing the test values.The study revealed that the tensile curves are significantly influenced by different factors such as strain rate, curing age and thickness of specimens. The presence of polyurethane polymer in the bituminous binder reduced water/moisture penetration and shorten the curing time compared to conventional bitumen. The amalgamation of PU and bitumen exhibits the enhanced property of elongation which is crucial property to counter structural moments and undulations along with tensile strength, tearing load and adhesion to different substrates such as metal, concrete. The end use of the resulting system developed depends on their physicomechanical properties relative to its constituent’s quantities, their interactions and the way product is processed. The main reason for use of this mix proportion is to incorporate advantageous properties of both materials to develop waterproofing. In this paper, testing of mechanical properties of polyurethane based bituminous waterproofing membrane developed has been discussed. These tests investigate the influence of composition on various credential values required in a waterproofing membrane. The research work discussed in the paper provides a scientific reference for the engineering application and design and development of polyurethane based bituminous waterproofing membrane.

Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends.

The aim of this study is the analyze the structure of branched polyurethanes based on synthetic poly([R,S]-3-hydroxybutyrate) and their blends with biopolymers and montmorillonite. The properties which would predict the potential susceptibility of these materials to degradation are also estimated. Fourier-transform infrared spectroscopy with attenuated total reflection analysis shows that poly([d,l]-lactide) is on the surfaces of polyurethanes, whereas chitosan and starch are included inside the blend network. Atomic force microscopy images have shown that the surfaces of investigated samples are heterogenous with the formation of spherulites in case of pure polyurethanes. The presence of biopolymers in the blend reduced the crystallinity of polyurethanes. Thermal stability of blends of polyurethanes with poly([d,l]-lactide) and polysaccharides decreased in comparison to pure polyurethanes. Although the tensile strength is reduced after the blending of polyurethanes with biopolymers, the elongation at break increased, especially in the case of polyurethane/poly([d,l]-lactide) blends. The presence of polysaccharides in the obtained blends caused the significant reduction of contact angle after one minute from water drop immersion. This hydrophilizing effect is the highest when montmorillonite has been incorporated into the chitosan blend. The estimated properties of the obtained materials suggest their potential sensitivity on environmental conditions.

A comprehensive study on shape memory behavior of PEG plasticized PLA/TPU bio-blends

In this study, the shape memory behavior of poly(ethylene glycol) (PEG) plasticized poly(lactic acid)/thermoplastic polyurethane (PLA/TPU) blends was investigated as functions of PLA/TPU ratio, plasticizer molecular weight and programming conditions. The mechanical, thermal and morphological properties of polymer blends were characterized by tensile tests, differential scanning calorimeter (DSC) and scanning electron microscopy (SEM). It was found that the addition of plasticizers decreased the glass transition and cold crystallization temperature of PLA phase. As the molecular weight of PEG increased, the plasticization efficiency decreased. The shape memory tests showed that the higher the TPU content, the higher the recovery ratio between 40 °C and 55 °C temperatures ranges. The maximum total recovery was obtained at 60 °C for 20/80 PLA/TPU blends. The decreasing molecular weight of PEG maximized the shape recovery values. It was demonstrated that the samples were able to lift stresses up to 245 kPa during shape recovery depending on the temperature and composition. Moreover, the biocompatibility and cytotoxicity tests revealed that plasticized PLA/TPU blends are non-toxic and safe to use in-vivo conditions.

Synthesis and characterization of stable and biological active chitin-based polyurethane elastomers

In this work, the preparation of novel biocompatible polyurethane (PU) elastomers were carried out using curcumin and 1,4-butanediol (1,4-BDO) via step growth polymerization reaction of hydroxyl terminated polybutadiene (HTPB), toluene diisocyanate (TDI) and chitin to improve the biocompatibility, antibacterial and antioxidant properties of PU elastomers. Five samples were synthesized by varying moles ratio of curcumin and 1,4-BDO. The structural study of blends was done by FTIR spectroscopy which confirmed the incorporation of curcumin and 1,4-BDO into the polyurethane matrix. TGA analysis of polyurethane (PU) blends showed good thermal stability with 0.25 M curcumin and 1.75 M 1,4-BDO. Measurements of antibacterial properties were done via agar diffusion method which showed outstanding potential against selected strains of bacteria. The results revealed that biocompatibility, antibacterial and antioxidant potential of purposed polyurethanes elastomers were improved by the incorporation of curcumin which might be the precursor of biomedical applications. Collectively, this work is a footstep towards the synthesis of innovative biocompatible materials which made it suitable for biological applications.

Nanocellular Polymers with a Gradient Cellular Structure Based on Poly(methyl methacrylate)/Thermoplastic Polyurethane Blends Produced by Gas Dissolution Foaming

AbstractGraded structures and nanocellular polymers are two examples of advanced cellular morphologies. In this work, a methodology to obtain low‐density graded nanocellular polymers based on poly(methyl methacrylate) (PMMA)/thermoplastic polyurethane (TPU) blends produced by gas dissolution foaming is reported. A systematic study of the effect of the processing condition is presented. Results show that the melt‐blending results in a solid nanostructured material formed by nanometric TPU domains. The PMMA/TPU foamed samples show a gradient cellular structure, with a homogeneous nanocellular core. In the core, the TPU domains act as nucleating sites, enhancing nucleation compared to pure PMMA and allowing the change from a microcellular to a nanocellular structure. Nonetheless, the outer region shows a gradient of cell sizes from nano‐ to micron‐sized cells. This gradient structure is attributed to a non‐constant pressure profile in the samples due to gas desorption before foaming. The nucleation in the PMMA/TPU increases as the saturation pressure increases. Regarding the effect of the foaming conditions, it is proved that it is necessary to have a fine control to avoid degeneration of the cellular materials. Graded nanocellular polymers with relative densities of 0.16–0.30 and cell sizes ranging 310–480 nm (in the nanocellular core) are obtained.

Dynamic multiphase semi-crystalline polymers based on thermally reversible pyrazole-urea bonds

Constructing responsive and adaptive materials by dynamic covalent bonds is an attractive strategy in material design. Here, we present a kind of dynamic covalent polyureas which can be prepared from the highly efficient polyaddition reaction of pyrazoles and diisocyanates at ambient temperature in the absence of a catalyst. Owing to multiphase structural design, poly(pyrazole-ureas) (PPzUs) show excellent mechanical properties and unique crystallization behavior. Besides, the crosslinked PPzUs can be successfully recycled upon heating (~130 °C) and the molecular-level blending of polyurea and polyurethane is realized. Theoretical studies prove that the reversibility of pyrazole-urea bonds (PzUBs) arises from the unique aromatic nature of pyrazole and the N-assisting intramolecular hydrogen transfer process. The PzUBs could further broaden the scope of dynamic covalent bonds and are very promising in the fields of dynamic materials.

Balanced Viscoelastic Properties of Pressure Sensitive Adhesives Made with Thermoplastic Polyurethanes Blends.

Pressure sensitive adhesives made with blends of thermoplastic polyurethanes (TPUs PSAs) with satisfactory tack, cohesion, and adhesion have been developed. A simple procedure consisting of the physical blending of methyl ethyl ketone (MEK) solutions of two thermoplastic polyurethanes (TPUs) with very different properties—TPU1 and TPU2—was used, and two different blending procedures have been employed. The TPUs were characterized by infra-red spectroscopy in attenuated total reflectance mode (ATR-IR spectroscopy), differential scanning calorimetry, thermal gravimetric analysis, and plate-plate rheology (temperature and frequency sweeps). The TPUs PSAs were characterized by tack measurement, creep test, and the 180° peel test at 25 °C. The procedure for preparing the blends of the TPUs determined differently their viscoelastic properties, and the properties of the TPUs PSAs as well, the blending of separate MEK solutions of the two TPUs imparted higher tack and 180° peel strength than the blending of the two TPUs in MEK. TPU1 + TPU2 blends showed somewhat similar contributions of the free and hydrogen-bonded urethane groups and they had an almost similar degree of phase separation, irrespective of the composition of the blend. Two main thermal decompositions at 308–317 °C due to the urethane hard domains and another at 363–373 °C due to the soft domains could be distinguished in the TPU1 + TPU2 blends, the weight loss of the hard domains increased and the one of the soft domains decreased by increasing the amount of TPU2 in the blends. The storage moduli of the TPU1 + TPU2 blends were similar for temperatures lower than 20 °C and the moduli at the cross over of the moduli were lower than in the parent TPUs. The improved properties of the TPU1 + TPU2 blends derived from the creation of a higher number of hydrogen bonds upon removal of the MEK solvent, which lead to a lower degree of phase separation between the soft and the hard domains than in the parent TPUs. As a consequence, the properties of the TPU1 + TPU2 PSAs were improved because good tack, high 180° peel strength, and sufficient cohesion were obtained, particularly in 70 wt% TPU1 + 30 wt% TPU2 PSA.

Synergistic effects of red phosphorus masterbatch with expandable graphite on the flammability and thermal stability of polypropylene/thermoplastic polyurethane blends

The flammability characterization and synergistic effects of red phosphorus masterbatch (RPM) with expandable graphite (EG) in flame-retardant polypropylene (PP)/thermoplastic polyurethane (TPU) composites are investigated by limiting oxygen index, UL-94 testing, cone calorimeter tests, thermal gravimetric analysis, Fourier transform infrared (FTIR), and scanning electron microscopy. The results show that the flame retardancy of PP/TPU/EG/RPM composites is greatly influenced by RPM. The synergistic effects between RPM and EG take place in the flame-retardant composites. The presence of RPM with EG decreases significantly the heat release rates and total heat release, and UL-94 V-0 rating is achieved when suitable amount of RPM substitutes for EG in the PP/TPU/EG/RPM composites. The T onset and T 10 wt% of the composites are improved because of the presence of RPM. The FTIR spectra show that the incorporation of RPM improves the thermo-oxidative stability of PP/TPU at higher temperatures. The morphological observations indicate the reinforcement of thermal stability, and flame-retardant performance is attributed to the compact and stable char layers promoted by RPM with EG acted as an effective heat barrier and thermal insulation.

Force recovery evaluation of thermo-induced shape-memory polymer stent: material, process and thermo-viscoelastic characterization

Due to their functional and biological benefits, shape memory polymer (SMP) stents have attracted the attention of researchers in the biomedical science area. The highlights of this article are the evaluation of stent performance including radial force recovery and recovery start temperature (RST) in a constrained state. The effects of polyurethane (PU) mechanical properties and fabrication method are investigated on thermo-viscoelastic properties, sample defect and shape recovery of PU and polycaprolactone (PCL) blend. Thereafter, three tubular stents fabricated with the different diameter to thickness (d/t) ratio and their mechanical behavior are examined in loading, relaxation, and unloading. Finally, the radial force recovery of the stents is measured after stimulation in temperatures up to 45 °C. Emerging more peaks in the delta tangent graph implies that samples fabricated with solution-mixing has a better viscoelastic behavior and shows fewer defects compared to the melt-mixing ones. The fabrication method was much more effective on enhancement of the storage and loss modulus compared to double increasing of Young’s modulus of applied PU from 4.3 to 9 MPa. Moreover, an increase in the stent’s d/t from 15 to 10 causes not only an increase in the radial stiffness and force recovery but also leads to the reduction of irreversible deformation and RST. The results of this research reveals the importance of the dimensional and geometric design of SMP stents in controlling the force recovery and RST.

Materials with enhanced adhesive properties based on acrylonitrile-butadiene-styrene (ABS)/thermoplastic polyurethane (TPU) blends for fused filament fabrication (FFF)

In the current work, we prepared a novel material suitable for additive manufacturing by using acrylonitrile-butadiene-styrene (ABS) copolymer as matrix and a thermoplastic polyurethane (TPU) as additive. Conditions for successful printing via fused filament fabrication (FFF) were optimized for the ABS:TPU blends. Compatibility of ABS and TPU in the blends was studied by Fourier-transformed infrared (FTIR) spectroscopy, showing the appearance of new supramolecular interactions via hydrogen bonding. Compositional studies were carried out by confocal Raman microscopy and atomic force microscopy (AFM), demonstrating the good compatibility between the two compounds. Mechanical and adhesive properties were studied by 3D-printing different normalized test specimens in different directions. It was shown that blends containing 10–20 wt% TPU led to enhanced adhesion between layers without loss in yield strength, while 30 wt% TPU led to a good adhesion between layers and to the printing platform when printing at room temperature.

An assessment on the effect of trifluoropropyl-POSS and blend composition on morphological, thermal and thermomechanical properties of PLA/TPU

The influence of blending ratio and trifluoropropyl polyhedral oligomeric silsesquioxane (POSS) on microstructure, melt and cold crystallization behavior, thermomechanical and thermal stability of melt-blended polylactic acid/thermoplastic polyurethane (PLA/TPU) blends was investigated using various techniques. Morphological observations (TEM and EDX) showed that POSS nanoparticles have a good dispersion state throughout the matrix and localize in both phases and also at the blend interface. POSS nanoparticles hindered the melt crystallization of PLA while enhancing the degree of cold crystallinity of PLA. In addition, the dispersed TPU droplets in PLA matrix induced a nucleation effect on melt crystallization of PLA, especially at low contents. On the contrary, the cold crystallization temperature of PLA shifted to a higher temperature in the presence of TPU phase, but the degree of crystallinity improved in the case of heating with a low rate. Although the addition of TPU to PLA resulted in a decrement in onset degradation temperature, the samples degraded in wider ranges than neat PLA. The onset degradation temperature of samples in inert ambient was declined by the addition of POSS due to its low thermal stability. These nanoparticles slightly enhanced the thermal stability of PLA-rich samples in air ambient but had no sensible effect on TPU-rich samples. The storage modulus values of the PLA/TPU blends gradually decreased with increasing TPU content. In addition, incorporation of POSS nanoparticles, generally, increased the values of storage modulus but reduced the glass transition temperature, proving the lubrication effect of POSS nanoparticles.

Enhancing Impact Toughness of Renewable Poly(lactic acid)/Thermoplastic Polyurethane Blends via Constructing Cocontinuous-like Phase Morphology Assisted by Ethylene–Methyl Acrylate–Glycidyl Methacrylate Copolymer

Poly(lactic acid) (PLA)/thermoplastic polyurethane (TPU) blends and their ternary blends with the incorporation of ethylene–methyl acrylate–glycidyl methacrylate copolymer (E–MA–GMA) were prepared by melt blending. The PLA/TPU (70/30) blend exhibited optimum elongation at break of 615% and impact strength of 53.6 kJ/m2. Compared with PLA/TPU (90/10) blend, the impact strength of PLA/TPU/E–MA–GMA (80/10/10) blend increased by more than 15 times; meanwhile, the elongation at break did not suffer apparent reduction. Fourier transform infrared (FTIR) spectroscopy and dynamic mechanical analysis (DMA) revealed the reaction and miscibility between components. Morphological observation by scanning electron microscopy (SEM) confirmed the transition from typical sea–island to cocontinuous-like structure due to the addition of E–MA–GMA. The toughening mechanism behind the supertoughened PLA ternary blends was established. The cocontinuous-like structure followed by massive plastic deformation of PLA matrix was beli...

SiO2/carbon fiber-reinforced polypropylene–thermoplastic polyurethane composites: electrical conductivity and mechanical and thermal properties

To achieve electrical conductive composites, carbon fibers (CFs) were introduced to polypropylene–thermoplastic polyurethane (PP/TPU) blends. In combination, a definite amount of silica (SiO2) nanoparticles were added as reinforcing agents to impregnate CFs and further improve the mechanical, thermal and electrical properties of CFs-modified PP/TPU composites. These quaternary composites were investigated by X-ray diffractometry technique, thermogravimetric analysis, scanning electron microscopy (SEM), mechanical measurement and electrical conductivity test. The results demonstrated that the crystallinity and flow rate of PP/TPU composites dropped after compounding with CFs, though they increased by the addition of SiO2. Both CFs and SiO2 improved the impact and tensile strength of quaternary composites, which were arising from the large aspect ratio of CFs and the reinforcement effect of SiO2 nanoparticle, respectively. Furthermore, CFs–PP/TPU and (CFs + SiO2)–PP/TPU composites exhibited superior thermal stability over PP/TPU composites, and (3CFs + 3SiO2)–PP/TPU composite exhibited a maximum value. It is attributed to the restriction of polymer chain motion created by the CF fillers and the insulating effect of SiO2. The SEM micrographs revealed the presence of plastic bands for CFs–PP/TPU and (CFs + SiO2)–PP/TPU composites and more refined arrangement of the fibers after incorporation of SiO2. This refinement resulted in higher electrical conductivity of (CFs + SiO2)–PP/TPU composites compared with CFs–PP/TPU composites.

Surface Characterization, Antimicrobial Effectiveness, and Human Cell Response for a Biomedical Grade Polyurethane Blended with a Mixed Soft Block PTMO-Quat/PEG Copolyoxetane Polyurethane.

Infection is a serious medical complication associated with health care environments. Despite advances, the 5-10% incidence of infections for hospital patients is well documented. Sources of pathogenic organisms include medical devices such as catheters and endotracheal tubes. Offering guidance for curbing the spread of such infections, a model antimicrobial coating is described herein that kills bacteria on contact but is compatible with human cells. To achieve these characteristics, a novel blend of a conventional biomedical grade polyurethane (Tecoflex) with mixed soft block polyurethane is described. The functional polyurethane (UP-C12-50-T) has a copolyoxetane soft block P-C12-50 with quaternary ammonium (C12) and PEG-like side chains and a conventional poly(tetramethylene oxide) (PTMO, T) soft block. DSC and DMA data point to limited miscibility of UP-C12-50-T with Tecoflex. The blend of Tecoflex with 10 wt % UP-C12-50-T designated UP-C12-50-T-10 radically changed surface properties. Evidence for surface concentration of the P-C12-50 soft block was obtained by atomic force microscopy (AFM), dynamic contact angles (DCAs), zeta potentials (ζ), and X-ray photoelectron spectroscopy (XPS). The antimicrobial effectiveness of the blend coatings was established by the ASTM E2149 "shake flask" test for challenges of E. coli and a methicillin resistant strain of S. epidermidis. Cytocompatibility was demonstrated with an in vitro test designed for direct contact (ISO 10993-5). Growth of human mesenchymal stem cells (MSCs) beside and under UP-C12-50-T-10 indicated remarkable biocompatibility for a composition that is also strongly antimicrobial. Overall, the results point to a model coating with a level of P-C12-50 that combines high antimicrobial effectiveness and low toxicity to human cells.

Factors Influencing Poor Outcomes in Synthetic Tissue-Engineered Tracheal Replacement.

Humans receiving tissue-engineered tracheal grafts have experienced poor outcomes ultimately resulting in death or the need for graft explantation. We assessed the performance of the synthetic scaffolds used in humans with an ovine model of orthotopic tracheal replacement, applying standard postsurgical surveillance and interventions to define the factors that contributed to the complications seen at the bedside. Large animal model. Pediatric academic research institute. Human scaffolds were manufactured with an electrospun blend of polyethylene terephthalate and polyurethane reinforced with polycarbonate rings. They were seeded with autologous bone marrow-derived mononuclear cells and implanted in sheep. Animals were evaluated with routine bronchoscopy and fluoroscopy. Endoscopic dilation and stenting were performed to manage graft stenosis for up to a 4-month time point. Grafts and adjacent native airway were sectioned and evaluated with histology and immunohistochemistry. All animals had signs of graft stenosis. Three of 5 animals (60%) designated for long-term surveillance survived until the 4-month time point. Graft dilation and stent placement resolved respiratory symptoms and prolonged survival. Necropsy demonstrated evidence of infection and graft encapsulation. Granulation tissue with signs of neovascularization was seen at the anastomoses, but epithelialization was never observed. Acute and chronic inflammation of the native airway epithelium was observed at all time points. Architectural changes of the scaffold included posterior wall infolding and scaffold delamination. In our ovine model, clinically applied synthetic tissue-engineered tracheas demonstrated infectious, inflammatory, and mechanical failures with a lack of epithelialization and neovascularization.

Stretchable strain sensors based on polyaniline/thermoplastic polyurethane blends

Thermoplastic polyurethane/polyaniline-based stretchable strain sensors were prepared via in situ polymerization of aniline in the TPU solution in the form of thin films. The sensors where characterized for morphological and thermal properties, mechanical hysteresis and cyclic piezoelectric performance. Thermogravimetric analysis showed blends to be thermally stable up to 230 °C. Electrical conductivity increased up to 30 wt% of Ani.DBSA loading after which a decline was observed due to reduced conversion of aniline monomer to polyaniline. Piezo-resistive measurements also showed a decrease in electrical conductivity upon stretching due to disconnection mechanism between Ani.DBSA particles. The cyclic piezo-resistive properties were evaluated at a strain of 10%. The sensors showed a gauge factor of 2.59. The dispersion and distribution was uniform at all levels of Ani.DBSA loading as visualized by SEM analysis. Beside uniform dispersion, SEM analysis also revealed polyaniline chains connecting with the polyurethane matrix which increases its conductivity. Hence, the proposed sensors can be employed as flexible strain sensors.

Exploring the effect of electron beam on swelling, gel fraction, mechanical and thermal properties of ethylene acrylic elastomer/millable polyurethane rubber blends

ABSTRACTEthylene acrylic elastomers (AEM) and millable polyurethane (MPU) blend have been prepared successfully using dicumyl peroxide (DCP) system and the blend ratio is optimised on the basis of the tensile results. The optimised unvulcanised blend ratio (60:40) is subjected to different electron beam (EB) dose to obtain uniform three dimensional crosslinking networks. The characteristic shifting of = CO vibration in the Fourier-Transform Infrared spectra confirms the formation of hydrogen bonding between the two phases. The phase morphology of the two phases in the optimised blend has been captured in SEM and the results show the successful integration of MPU in AEM phase. It is found that the swelling of the irradiated blend decreases with increase in EB dose, whereas the increase in gel fraction and the crosslink density is due to the irradiation-induced crosslinking. The thermal stability of the irradiated blend has been improved in compression to the pristine form of individual phase.

Effect of different parameters on the tribological performance of polypropylene/thermoplastic polyurethane blends under dry sliding conditions

In this study, polypropylene/thermoplastic polyurethane (PP/TPU) blends (weight ratios of 75/25 and 25/75) were produced by melt blending, and a maleic anhydride-grafted polypropylene (PP-g-MA) copolymer was used as a coupling agent. The effect of the concentration of the coupling agent (5–11 phr), TPU concentration (25–75%), normal load (2–4 N) and sliding velocity (60–72 rpm) on the wear properties of the blends were characterized through a pin-on-disc abrasive wear test. A \(2^{4}\) full-factorial experimental design was chosen to screen the significant factors and their interactions influencing the tribological performance of the blends. After the tests, the morphology of the worn surface of the samples was observed using scanning electron microscopy. Shore D hardness tests were also conducted and the relationships between these behaviours were analysed on the basis of the findings. According to the wear test results, the factors that have the greatest effect on the wear rates are as follows: normal load, TPU concentration, sliding velocity and PP-g-MA concentration, respectively. The wear rate of the blends increases by increasing the normal load, TPU concentration and sliding speed, and slightly decreases by increasing the PP-g-MA concentration. As expected, the wear and hardness results showed the apparent superiority of the \(\hbox {PP}_{75}/\hbox {TPU}_{25}\) blends over the \(\hbox {PP}_{25}/\hbox {TPU}_{75}\) blends, because of the higher content of rigid segments in the blends.

Kurkumin Yüklü Biyo-Bazlı Elektroeğirme Poliüretan Yapılar

Polymeric electrospun fibers present well-design scaffolds for wound healing applications. Here, the fabrication of biobased polyurethane (PU) blend fibers containing curcumin (Cur) was reported. Not only polymer concentration but also curcumin concentration affects the morphology, diameter, and contact angle values of the fibers. Morphological investigations revealed that the diameter and hydrophilicity of the PU fibers increased upon addition of curcumin. Effect of process parameters (applied voltage, flow rate, and tip-to-collector distance) on the average diameter and the hydrophilicity of the PU and PU/Cur fibers were examined. Optimum conditions to obtain uniform and bead-free PU/Cur fibers were determined as 12.5 kV, 1 mL/h, and 17 cm. This study demonstrates that the electrospinning process provides a simple way of obtaining bioactive agent loaded fibrous scaffolds, as well as contributing to a better understanding of the effect of process variables in the fabrication of PU/Cur blend fibers for wound healing applications.