Groups Of Polyacrylonitrile Research Articles

Comparison of the Interactions Between Anionic Surfactants and Polyacrylonitrile

Viscosity and specific electrical conductivity of polyacrylonitrile (PAN) in N,N-dimethylformamide (DMF) medium are studied in the presence and absence of anionic surfactants as sodium oleate, sodium dodecyl sulfate and palmitic. Critical micelle concentrations of these surfactants are determined in DMF medium. Thermodynamic functions (\({\Delta H^{\circ}_{\rm m},\,\Delta G^{\circ}_{\rm m}}\) and \({\Delta S^{\circ}_{\rm m}}\)) of micelle formation of sodium dodecylbenzene sulfonate and sodium dodecyl sulfate are determined. Curves of X-ray diffraction and differential thermal analysis showed that the PAN samples containing SDS lead to the development of the crystalline structure of PAN, and the initiation temperature decreases of the cyclization reaction of nitrile groups of PAN by 8.5 °C, respectively.

Study on Heavy Metal Ion Adsorption of PAN-Amidoxime Nanofiber Nonwoven Material

In this study, polyacrylonitrile-amidoxime nanofibers were prepared by combining the technique of electrospinning and chemical modification with hydroxylamine chloride. Before modified the Polyacrylonitrile (PAN) nanofibers were bonded with two layers Ethylene-Propylene Side By Side (ES) thermal bonded nonwovens to improve its mechanical strength. Subsequently, they were applied to adsorb copper ions. The results of FT-IR spectra and scanning electron microscope indicated that nitrile groups in PAN were partly converted into amidoxime groups and there were no serious cracks on the surface of PAN-amidoxime nanofibers. The adsorption data of Cu (II) ions was fitted roughly with the Langmuir isotherm. The maximal adsorption capacities of Cu (II) ions reached 176 mg/g.

The plasticization mechanism of polyacrylonitrile/1-butyl-3-methylimidazolium chloride system

The external plasticization of polyacrylonitrile (PAN) with high molecular weight was achieved, where 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) was explored as a novel plasticizer. The interaction and plasticization mechanism in PAN/[Bmim]Cl system were investigated. The Fourier transform infrared spectroscopy (FTIR) results show that there exists strong hydrogen interaction between nitrile (CN) groups of PAN and unsaturated C–H of imidazolium rings in [Bmim]Cl at high temperature. The addition of [Bmim]Cl leads to the decrease in glass transition temperature, melting temperature and paracrystalline content of the system due to the high penetration efficiency of [Bmim]Cl. The rheology of the system was studied as well, which proves the occurrence of the cyclization and oxidation reactions of PAN macromolecular chains along with X-ray photoelectron spectrometer and FTIR results. The cyclization reaction is significantly influenced by the [Bmim]Cl content in whole system, which further affects the spinnability of PAN/[Bmim]Cl system and ladder structure of the prepared fibers.

The use of a nanocellulose-reinforced polyacrylonitrile precursor for the production of carbon fibers

Polyacrylonitrile (PAN) reinforced by nanocellulose (NC) in different concentrations was used as a precursor for carbon fiber production. The NC was prepared by mechanical and chemical treatments. For control of the spinning process, the rheological properties of PAN–NC solutions were investigated. The strong polar interaction between the nitrile groups of PAN and the hydroxyl groups of NC resulted in the formation of an interconnected structure, as shown by the rheological properties. In addition, the NC was an effective reinforcement for PAN precursor because of its high aspect ratio and good interfacial adhesion to the PAN matrix. The spun PAN–NC fibers, containing NC in different concentrations, were oxidatively stabilized at 280 °C in air and carbonized at 1000 °C in nitrogen. Using Raman spectroscopy the Tuinstra–Koenig formula was used to estimate the graphite crystallite size of the resulting carbon fiber and it was found to have been increased by incorporation of the NC. The possibility of a decrease in energy consumption by lowering the carbonization temperature as a result of incorporation of NC was confirmed.

Centimeter-scale giant spherulites in mixtures of polar polymers and crystallizable diluents: Morphology, structure, formation and application

A series of giant spherulites at centimetre scale were effectively constructed from the mixtures of polyacrylonitrile (PAN)/dimethyl sulfone (DMSO2), although neither PAN nor DMSO2 itself forms spherical morphology during crystallization. A detailed investigation was carried out on the morphology, microstructure, and formation mechanism by polarized optical microscopy, scanning electron microscopy, wide-angle X-ray diffraction, polarized FTIR spectroscopy, and differential scanning calorimetry. These giant spherulites constituted of PAN phase and DMSO2 crystals alternately distributed in divergent patterns. The fast crystallization of DMSO2 dominates the large growth rate and the macroscopic size, while PAN composes the skeleton of the giant spherulites. The cooperative deposition of PAN beside DMSO2 crystals originates from dipole–dipole interaction between the nitrile groups of PAN and the sulfone groups of DMSO2, accounting for the branching and splaying in the giant spherulites. These macroscopic morphologies were universally observed in other mixtures of PAN/dimethyl sulfoxide, PAN/maleic anhydride, poly(vinylidene fluoride)/DMSO2, and cellulose acetate/DMSO2. We propose that the giant spherulites can be formed by introducing suitable diluent crystallization and appropriate polymer–diluent interaction. Furthermore, this spherulitic pattern has been used as a template to direct the oriented growth of calcium carbonate based on the molecular orientation in the giant spherulite.

Interactions between Polyacrylonitrile and Solvents: Density Functional Theory Study and Two-Dimensional Infrared Correlation Analysis

Polyacrylonitrile (PAN) is a semicrystalline polymer with high polarity and is usually processed from solutions. Selected solvents for processing influence both the structure and properties of PAN products. We describe the interactions between PAN and various solvents by theoretical calculation based on density functional theories (DFT), and by experimental methods of Fourier transform infrared (FTIR) spectra and two-dimensional infrared (2D-IR) correlation analysis. The selected solvents include dimethyl sulfone (DMSO2), dimethyl sulfoxide (DMSO), ethylene carbonate (EC), propylene carbonate (PC), N,N-dimethyl formamide (DMF), and N,N-dimethyl acetamide (DMAc). Calculation results show that the PAN model monomer (PAN') interacts with each solvent through dipole-dipole interaction and formed PAN'-solvent complexes. Each complex displays an antiparallel alignment of interacting pair between the C≡N group of PAN' and the polar group of solvent molecule (S═O or C═O group). The calculated binding energies (ΔE) reveal that PAN' preferentially interacts with solvent in the order of DMSO2 > DMSO > EC > PC > DMF > DMAc. Red shifts of vibration frequencies are observed for C≡N, S═O, and C═O stretching bands. The C≡N stretching band shifts from 2245 cm(-1) in PAN to 2240, 2242, and 2241 cm(-1) in PAN-DMSO, PAN-EC, and PAN-DMF mixtures, respectively, indicating the existence of PAN-solvent interactions. Moreover, 2D-IR correlation analysis shows that as the PAN content increases, DMSO molecules vary prior to PAN-DMSO complexes, and change earlier than PAN bulk. However, PAN-EC and PAN-DMF mixtures follow the order of PAN bulk > PAN-solvent complexes > solvent molecules. This combination of theoretical simulation and experimental characterization is useful in selection of solvents for PAN or even other polar polymers and can provide an insight into the physical behavior of PAN-solvent complexes.

Hemodialysis with a Dialyzer Loaded with Argatroban May Be Performed in vivo without a Systemic Anticoagulant

Background/Aims: Anticoagulation in hemodialysis (HD) patients at high risk of bleeding remains an intractable problem. Simulating endothelial cells by releasing anticoagulant on the membrane may be a promising alternative. Methods: We modified a polyacrylonitrile (PAN) dialyzer by loading argatroban into its membrane and verified its anticoagulation efficiency and its influence on coagulation markers such as activated partial thromboplastin time (aPTT), D-dimer and thrombin-antithrombin complex (TAT) in an animal HD model. Results: All HD sessions with the argatroban dialyzer were completed successfully with either no or minimal fiber clotting. D-dimer was lower in the argatroban group than in the PAN group; TAT and aPTT values were similar in the two groups, which suggests better anticoagulation and a similar influence on the coagulation system. Conclusion: HD with the argatroban dialyzer is feasible, safe and simple, and could be used in patients at high risk of bleeding.

Water effect on the rheologic behavior of PAN solution during thermal‐induced gelation process

AbstractThe thermal‐induced gelation process in a polyacrylonitrile (PAN) solution containing different amounts of water was investigated through both dynamic and steady‐state rheologic measurements. During the cooling process, the storage modulus G′ was found to intersect with the loss modulus G″ at a temperature which can be considered as the incipient gel point Tig. This crossover point increased with the water content in the PAN solution. On the basis of the power law $G'\tilde{G}\tilde{\omega} {}^{n} $ and the relation ${\rm tan}\ \delta = G(\omega )/G^{'}(\omega ) = {\rm tan}(n\pi /2) = {\rm const}$, the loss tangent tan δ was traced with decreased temperature at various oscillation frequencies, and a crossover point was observed at the temperature a little higher than the Tig above for all PAN solutions. The water content might affect the value of the relaxation exponent n via two different mechanisms, that is, hydration decoupling of the pendant nitrile groups in PAN at low water content (2 wt% water) and molecule aggregation at high water content (4 and 6 wt%). Nevertheless, the slight difference in the n values reflects the unique structure of the critical gels irrespective of the water level. The apparent viscosity ηa of either the PAN solution or the PAN gel was found to rise with increased water content and both showed pronounced shear‐thinning behavior. Compared with temperature, the water effect on the apparent viscosity ηa is more significant due to the water‐induced aggregation of the molecular chains. Copyright © 2010 John Wiley & Sons, Ltd.

Immobilization of Pseudomonas cepacia lipase onto the electrospun PAN nanofibrous membranes for transesterification reaction

Abstract Pseudomonas cepacia lipase was immobilized onto the electrospun polyacrylonitrile (PAN) nanofibrous membrane with covalent binding by activating the nitrile groups of PAN using the amidination reaction successfully. The fiber diameters of initial PAN nanofibers were between 150 and 300 nm. The lipase molecules (1–2 μm) were observed to be attached onto the nanofiber surfaces. After 5 min activation and 30 min reaction with lipase solution, the protein loading has reached saturation point and the immobilized lipase retained 79% activity compared to that of free lipase. The kinetic parameters, K m and V max , were determined to be 56.7 mM and 22.5 U/mg for free lipase and 88.4 mM and 18.3 U/mg for immobilized lipase. To compare with free lipase, the pH stability of immobilized lipase was improved significantly in the acidic conditions and the thermal stability of immobilized lipase still maintained 90% of initial specific activity when the temperature achieved 70 °C. After being stored at 30 °C for 20 days, the immobilized lipase kept almost 100% of its initial specific activity. For reusability test, the immobilized lipase still retained 98% of its original specific activity after 10 batch cycles. These results show that the proposed scheme for lipase immobilization has potential in industrial transesterification reaction such as biodiesel production.

Synthesis and characterization of conducting gas barrier polyacrylonitrile/graphite nanocomposites

AbstractGraphite platelets were expanded by functionalization with inorganic acids followed by strong thermal treatment. The expanded graphite (EG) was exfoliated on the polyacrylonitrile (PAN) matrix through in situ emulsion sonication technique with different proportions of EG. The Ultraviolet‐visible (UV) spectroscopy revealed the interaction between EG and PAN matrix. In Fourier Transform Infrared spectroscopy (FTIR), the chemical interaction between EG and the cyanide group of PAN was evidenced to the formation of PAN/EG composites. The X‐ray diffraction pattern of raw graphite (RG), expanded graphite (EG), polyacrylonitrile (PAN), and PAN/EG nanocomposites were evidenced the dispersion of EG with the PAN matrix. The morphology of EG, PAN, and PAN/EG composites were studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The tensile strength of PAN/EG nanocomposite was measured and found to be increased with increase in EG concentrations. The conductivity and impedance of composites were measured as function of EG concentration. It was found that, conductivity of composites gradually increased with the increase in EG loading. Oxygen permeability of PAN/EG was reduced substantially with rise of EG proportion. To investigate the flame retardancy behavior of PAN/EG nanocomposites, the limiting oxygen indexes were calculated. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers

Synthesis of Monodispersed Co(Fe)/Carbon Nanocomposite Microspheres with Very High Saturation Magnetization

Through the complexation of cyano groups in polyacrylonitrile (PAN) microspheres with cobalt (iron) ions under mild conditions, cobalt (iron)-containing PAN microspheres could be prepared effectively, then after pyrolyzation of the composite microspheres at 800 °C under N2 atmosphere, Co(Fe)/carbon nanocomposite microspheres could be prepared, and the metal content is up to ∼71 wt % in the Co(Fe)/carbon nanocomposite microspheres. Thermogravimetric analysis, transmission electron microscopy, and vibrating sample magnetometry investigation proved that almost all the cobalt nanoparticles were embedded in the interior of the carbon microspheres, which protected the metal nanocrystals (Co or Fe) from oxidation. The microspheres possess high magnetization (Ms is up to ∼161 emu/g) and show near-zero remanence and coercivity (Hc is down to ∼0.012 KOe) at room temperature, suggesting that they are outstanding soft ferromagnets with high magnetic susceptibilities and practically nil hysteresis loss.

In situ study of diffusion and interaction of water and electrolyte solution in polyacrylonitrile (PAN) membrane using FTIR and two-dimensional correlation analysis

In the study, the diffusion process of water and CaCl 2 aqueous solution in polyacrylonitrile (PAN) membrane have been investigated using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and two-dimensional (2D) correlation analysis. In 2D ATR-FTIR spectra, the water ν(OH) band in PAN membrane during both water and CaCl 2 solution diffusion is split into three separate bands. However, the OH band appearing from bound water which forms hydrogen-bonding of CaCl 2 solution diffusion has a considerably lower wavenumber than that of pure water diffusion, which is due to association between Ca 2+ ions and the C N groups in PAN. The sequential orders of the intensity changes for water and CaCl 2 solution diffusion in the region of ν(OH) and ν(CN) bands reveal the diffusion process and interaction of water and electrolyte in PAN membrane. That is, in the process of water diffusion in PAN membrane, water molecules first interact with –CN group in PAN to form weak hydrogen bond, then the moderate hydrogen-bonding interactions start gradually, and finally, the strong hydrogen-bonding interactions may be formed. When CaCl 2 solution diffuses in PAN membrane, the C N groups in PAN first associate with Ca 2+ ions and then interact with water molecules to form hydrogen bond that grows gradually from weak to strong. Furthermore, the results are validated further by band fitting to calculate the ratio of each component band area and the proportion of component band to ν(OH) water band.

Synthesis of Starch—Poly(Sodium Acrylate-co-Acrylamide) Superabsorbent Hydrogel with Salt and pH-Responsiveness Properties as a Drug Delivery System

The synthesis and swelling behavior of a superabsorbent hydrogel based on starch (St) and polyacrylonitrile (PAN) were investigated. The physical mixture of St and PAN was hydrolyzed with NaOH solution to yield St—poly(sodium acrylate-co-acrylamide) superabsorbent hydrogels. The nitrile groups of PAN were completely converted to a mixture of hydrophilic carboxamide and carboxylate groups during the basic hydrolysis followed by in situ crosslinking of the PAN chains by the starch alkoxide ions. A mechanism for hydrogel formation was proposed and the structure of the product was established using FTIR spectroscopy. The effect of reaction variables, such as, base concentration, hydrolysis time, and temperature were systematically optimized to achieve a hydrogel with swelling capacity as high as possible. The optimized swelling capacity in distilled water was found to be >500g/g. The absorbency of the hydrogels indicated that the swelling ratios decreased with ionic strength increases. The St—poly(sodium acrylate-co-acrylamide) hydrogel exhibited a pH-responsive swelling—deswelling behavior at pH's 2 and 8. This on—off switching behavior provides the hydrogel with the potential to control delivery of bioactive agents. Release profiles of ibuprofen (IBU), a poor watersoluble drug, from the hydrogels were studied under both simulated gastric and intestinal pH conditions. The release was much quicker at pH 7.4 than at pH 1.2. The swelling rates of the hydrogels with various particle sizes were investigated as well.

Synthesis and superswelling behavior of carboxymethylcellulose–poly(sodium acrylate‐co‐acrylamide) hydrogel

AbstractIn this paper, attention is paid to synthesis and swelling behavior of a superabsorbent hydrogel based carboxymethylcellulose (CMC) and polyacrylonitrile (PAN). The physical mixture of CMC and PAN was hydrolyzed in NaOH solution to yield hydrogel, CMC–poly(NaAA‐co‐AAm). During alkaline hydrolysis, the nitrile groups of PAN were completely converted to a mixture of hydrophilic carboxamide and carboxylate groups followed by in situ crosslinking of the grafted PAN chains. A proposed mechanism for hydrogel formation was suggested and the structure of the product was established using FTIR spectroscopy. The reaction variables affecting the swelling capacity of the hydrogel were systematically optimized to achieve a hydrogel with swelling capacity as high as possible. Swelling measurements of the synthesized hydrogels in various chloride salt solutions indicated a swelling‐loss with increase in the ionic strength of the salt solutions. The pH of the various solutions also affected the swelling of the superabsorbent. Furthermore, the present hydrogels showed a pH‐reversible property. Finally, the swelling kinetics of synthesized hydrogels with various absorbent particle sizes was briefly examined. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

Compatibility studies with blends based on hydroxypropylcellulose and polyacrylonitrile

The solubility parameters of hydroxypropylcellulose (HPC) were measured with the viscosity method and estimated from proposing a group contribution approach for the prediction of δ based on the separation of the solubility parameter into three components (dispersion, polarity, and hydrogen bonding contributions). Hansen’s three dimensional solubility parameters were calculated approximately through the contributions of the structural groups. The compatibility of the HPC and polyacrylonitrile (PAN) blend system was studied with theoretical calculations as well as experimental measurements. Viscometric methods, polarized optical microscopy (POM), scanning electron microscopy (SEM), infrared spectrophotometric and thermogravimetry analysis (TGA) were employed for this investigation. The viscometric methods and polarized optical microscopy results were obtained from the blended solution in the range of 0–1.0 weight fraction of PAN, and the scanning electron microscopy, infrared spectrophotometric and thermogravimetry analysis results were obtained from the transparent films cast from the blended solutions that contained 0.2, 0.5 and 0.8 weight fractions of PAN, respectively. The results showed an excellent compatibility existed in the blends system, which may due to the strong hydrogen-bonding interaction between the hydroxyl group of HPC and the nitrile group of PAN.

Polymer-nanoinclusion interactions in carbon nanotube based polyacrylonitrile extruded and electrospun fibers

Specific interfacial interactions in multi-component systems such as composites improve the chemical compatibility between the filler and the matrix, prevent the filler from aggregating and strengthen the interface. Carbon nanotube (CNT) based polyacrylonitrile (PAN) composites were prepared either by extrusion or electrospinning to yield fibers with diameters on two different scales – micro- and nanometric. Introduction of a third component, ethylene carbonate, a plasticizer which is capable of forming strong dipolar interactions with the nitrile group of the polymer, had a four-fold effect. It enabled melt-processing of the polymer, caused a structural transition in the crystalline matrix, improved the uniformity and decreased the diameter of the electrospun fibers. It also indirectly revealed a preferred interaction between the π-electrons of the CNT and the nitrile groups of PAN, as was identified based on synchrotron microbeam WAXD, DSC, 13C NMR and FTIR of CNT-filled and unfilled PAN fibers. The nature of CNT and PAN interaction was modeled by charge-transfer of CNT π-electrons from the highest occupied molecular orbital to the empty nitrile π∗ orbital of PAN.

Chemically selective soft X-ray patterning of polymers

The chemically selective modification of polymer mixtures by monochromated soft X-rays has been explored using the high-brightness fine-focused 50 nm beam of a scanning transmission X-ray microscope. Four different polymer systems were examined: a polymethylmethacrylate (PMMA) polyacrylonitrile (PAN) bilayer film; a PMMA-blend-PAN microphase-separated film; a poly(MMA-co-AN) copolymer film; and a poly(ethyl cyanoacrylate) homopolymer film. A high level of chemically selective modification was achieved for the PMMA/PAN bilayer; in particular, irradiation at 288.45 eV selectively removed the carbonyl group from PMMA while irradiation at 286.80 eV selectively reduced the nitrile group of PAN, even when these irradiations were carried out at the same (x,y) position of the sample. In the last two homogenous polymer systems, similar amounts of damage to the nitrile and carbonyl groups occurred during irradiation at either 286.80 or 288.45 eV. This is attributed to damage transfer between the C[triple-bond]N and C=O groups mediated by primary electrons, secondary electrons or radical/ionic processes, aided by their close spatial proximity. Although the overall thickness of the bilayer sample at 70 nm is smaller than the lateral line spreading of 100 nm, the interface between the layers appears to effectively block the transport of energy, and hence damage, between the two layers. The origins of the line spreading in homogeneous phases and possible origins of the damage blocking effect of the interface are discussed. To demonstrate chemically selective patterning, high-resolution multi-wavelength patterns were created in the PMMA/PAN bilayer system.

Partially hydrolyzed kappa carrageenan—polyacrylonitrile as a novel biopolymer‐based superabsorbent hydrogel: Synthesis, characterization, and swelling behaviors

AbstractIn this paper, synthesis and swelling behavior of a novel superabsorbent hydrogel based on kappa carrageenan (κC) and polyacrylonitrile (PAN) was investigated. To achieve partially hydrolyzed κC‐PAN hydrogel, physical mixture of κC and PAN was hydrolyzed by NaOH solution. During alkaline hydrolysis, the nitrile groups of PAN are converted to a mixture of hydrophilic carboxamide and carboxylate groups follow by in situ crosslinking of the grafted PAN chains. The reaction variables affecting on the swelling capacity of the hydrogel were systematically optimized to achieve a hydrogel with swelling capacity as high as possible. Under the optimized conditions concluded, super swelling hydrogel with the ability of water absorption up to 3260 g/g (water/dry hydrogel powder) has been prepared. Swelling measurements of the synthesized hydrogels was carried out in various salt solutions and solutions with different pH. The results indicate that the hydrogels have good pH sensitivity and pH‐reversible property between pH 2 and pH 8. POLYM. ENG. SCI. 46:1778–1786, 2006. © 2006 Society of Plastics Engineers.

Assembly of Well-Aligned Multiwalled Carbon Nanotubes in Confined Polyacrylonitrile Environments: Electrospun Composite Nanofiber Sheets

Highly oriented, large area continuous composite nanofiber sheets made from surface-oxidized multiwalled carbon nanotubes (MWNTs) and polyacrylonitrile (PAN) were successfully developed using electrospinning. The preferred orientation of surface-oxidized MWNTs along the fiber axis was determined with transmission electron microscopy and electron diffraction. The surface morphology and height profile of the composite nanofibers were also investigated using an atomic force microscope in tapping mode. For the first time, it was observed that the orientation of the carbon nanotubes within the nanofibers was much higher than that of the PAN polymer crystal matrix as detected by two-dimensional wide-angle X-ray diffraction experiments. This suggests that not only surface tension and jet elongation but also the slow relaxation of the carbon nanotubes in the nanofibers are determining factors in the orientation of carbon nanotubes. The extensive fine absorption structure detected via UV/vis spectroscopy indicated that charge-transfer complexes formed between the surface-oxidized nanotubes and negatively charged (-CN[triple bond]N:) functional groups in PAN during electrospinning, leading to a strong interfacial bonding between the nanotubes and surrounding polymer chains. As a result of the highly anisotropic orientation and the formation of complexes, the composite nanofiber sheets possessed enhanced electrical conductivity, mechanical properties, thermal deformation temperature, thermal stability, and dimensional stability. The electrical conductivity of the PAN/MWNT composite nanofibers containing 20 wt % nanotubes was enhanced to approximately 1 S/cm. The tensile modulus values of the compressed composite nanofiber sheets were improved significantly to 10.9 and 14.5 GPa along the fiber winding direction at the MWNT loading of 10 and 20 wt %, respectively. The thermal deformation temperature increased with increased MWNT loading. The thermal expansion coefficient of the composite nanofiber sheets was also reduced by more than an order of magnitude to 13 x 10(-6)/ degrees C along the axis of aligned nanofibers containing 20 wt % MWNTs.

The influence of lithium ions on molecular interaction and conductivity of composite electrolyte consisting of TPU and PAN

Investigation on new polymer electrolytes comprising of thermoplastic polyurethane (TPU) and polyacrylonitrile (PAN) and having different extent of Li + ions has been made. Both solid and gelatinous polymer electrolytes were prepared and studied. In order to interpret the changes in morphology and conductivity of the composite, Fourier-transform infrared spectroscopy (FTIR) and AC impedance studies have been utilized. The FTIR spectral bands associated with NH and CO groups of TPU were deconvoluted and used to obtain the modifications in molecular interactions. The swelling characteristics of the composite polymer in the liquid electrolyte were studied. By analyzing the FTIR spectrum of the gelled composite, the interaction of Li + ion with CN groups in PAN was identified. The composite polymer electrolyte has sufficient electrochemical stability to allow safe operation in rechargeable lithium polymer batteries.