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Relevant bibliographies by topics / Polymers blend

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Academic literature on the topic 'Polymers blend'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Polymers blend"

1

Sweah, Zainab J. "A Swelling Study in Different PH and Mechanical Properties of Biodegradable Films Based on Pluronic F-127/ Poly-Vinyl Alcohol." Materials Science Forum 1002 (July 2020): 389–98. http://dx.doi.org/10.4028/www.scientific.net/msf.1002.389.

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PluronicF-127/PVA polymeric biomaterials blend films plasticized with glycerin were prepared by solvent molding method. The polymer blend films were characterized using Fourier transform infrared (FTIR) spectroscopy, Field Emission Scanning Electron Microscopy and mechanical measurements. The FTIR spectra of the two polymers and their blends show that there is no chemical interaction between the PVA and the PluronicF-127. FESEM images indicate that blend homogeneous film can easily be prepared. Mechanical and swelling properties of the studied blends indicate that these can be used for medical application such as biodegradable materials and biodegradable drugs carriers and as food packaging materials.

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Cavanaugh, T. J., K. Buttle, J. N. Turner, and E. B. Nauman. "The study of multiphase polymer-blend morphologies by HVEM." Proceedings, annual meeting, Electron Microscopy Society of America 54 (August 11, 1996): 180–81. http://dx.doi.org/10.1017/s0424820100163368.

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Multiphase polymer blends are important in the polymer industry. Most commercial blends consist of two main polymers combined with a third, compatibilizing polymer, typically a graft or block copolymer. The most common examples are those involving the impact modification of a brittle thermoplastic by the microdispersion of a rubber into the matrix. Recently, a model of ternary polymer blends has provided a wealth of morphologies for examination. Even though this model can give an excellent basis for the design of a polymer blend, experimental verification is necessary. A correlation of blend properties such as impact strength with blend morphology must also be made. The focus is to confirm the predicted morphologies in binary and ternary blends using HVEM.The polymer blends were produced by compositional quenching. In this process, the polymers were dissolved in a solvent. The solution was pumped through a heat exchanger and then flashed across a needle valve to remove the solvent.

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Mhessn, R. Jameel, L. Abd-Alredha, R. Al-Rubaie, and A. Fuad Khudair Aziz. "Preparation of Tannin Based Hydrogel for Biological Application." E-Journal of Chemistry 8, no. 4 (2011): 1638–43. http://dx.doi.org/10.1155/2011/763295.

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Polymeric blends as potential wound dressing were prepared. Natural polymer (Tannin) and synthetic polymers (PVA and PEG) were used to prepare heterogeneous blends. The product was identified by spectrophotometry. A diaphragm cell was used to measure the diffusion coefficient (D). The result shown the PEG-PVA disk was very faster permeability for all solution. The D of PVA/ PEG-Tannin blend was 0.184x10-3cm2/s higher than Tannin-PEG blend was 0.038x10-3cm2/s. The natural phenolic compounds that can be used artificial membrane to inhibit growth or kill microorganism such as bacteria or fungi.

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Negim, Elsayed, G. Yeligbayeva, Rimma Niyazbekova, R. Rakhmetullayeva, A. A. Mamutova, R. Iskakov, M. Sakhy, and G. A. Mun. "Studying physico-mechanical properties of cement pastes in presences of blend polymer as chemical admixtures." International Journal of Basic and Applied Sciences 4, no. 3 (June 25, 2015): 297. http://dx.doi.org/10.14419/ijbas.v4i3.4716.

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<p>Physico-mechanical properties of cement pastes were studied by setting time, combined water, compressive strength, SEM as well as porosity in presence of blend polymers. Blend polymers were used based on polyvinyl alcohol and carbamide with blend ratios 20/80, 40/60 and 80/20 respectively. The addition of blend polymers to cement pastes affected the physico-mechanical properties of cement pastes. As the content of carbamide in the polymer blends decreased, the water of consistency decreased, whereas the setting times (initial & final) were elongated. The combined water content and compressive strength of the hardened cement pastes were increased at all ages of hydration. The SEM images showed that the addition of these polymers to cement material improves the dispensability and workability of cement pastes.</p>

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Singh, Pradeep, B. R. Venugopal, and Radha Kamalakaran. "Scanning Transmission Electron Microscopy for Polymer Blends." Journal of Modern Materials 4, no. 1 (September 29, 2017): 31–36. http://dx.doi.org/10.21467/jmm.4.1.31-36.

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Physical properties of the polymer can be altered by mixing one or more polymers together also known as polymer blending. The miscibility of polymers is a key parameter in determining the properties of polymer blend. Conventional transmission electron microscopy (CTEM) plays a critical role in determining the miscibility and morphology of the polymers in blend system. One of the most difficult part in polymer microscopy is the staining by heavy metals to generate contrast in CTEM. RuO4 and OsO4 are commonly used to stain the polymer materials for CTEM imaging. CTEM imaging is difficult to interpret for blends due to lack of clear distinction in contrast. Apart from having difficulty in contrast generation, staining procedures are extremely dangerous as improper handling could severely damage skin, eyes, lungs etc. We have used scanning transmission electron microscopy (STEM) to image polymer blends without any staining processes. In current work, Acrylonitrile Butadiene Styrene (ABS)/Methacrylate Butadiene Styrene (MBS) and Styrene Acrylonitrile (SAN) along with filler additive were dispersed on Polycarbonate (PC) matrix and studied by STEM/HAADF (high angle annular dark field). By using HAADF, contrast was generated through molecular density difference to differentiate components in the blend.

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Quitadamo, Alessia, Valerie Massardier, and Marco Valente. "Eco-Friendly Approach and Potential Biodegradable Polymer Matrix for WPC Composite Materials in Outdoor Application." International Journal of Polymer Science 2019 (January 27, 2019): 1–9. http://dx.doi.org/10.1155/2019/3894370.

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Blends based on high-density polyethylene (HDPE) and poly(lactic) acid (PLA) with different ratios of both polymers were produced: a blend with equal amounts of HDPE and PLA, hence 50 wt.% each, proved to be a useful compromise, allowing a high amount of bioderived charge without this being too detrimental for mechanical properties and considering its possibility to biodegradation behaviour in outdoor application. In this way, an optimal blend suitable for producing a composite with cellulosic fillers is proposed. In the selected polymer blend, wood flour (WF) was added as a natural filler in the proportion of 20, 30, and 40 wt.%, considering as 100 the weight of the polymer blend matrix. There are two compatibilizers to modify both HDPE-PLA blend and wood-flour/polymer interfaces, i.e., polyethylene-grafted maleic anhydride and a random copolymer of ethylene and glycidyl methacrylate. The most suitable percentage of compatibilizer for HDPE-PLA blends appears to be 3 wt.%, which was selected also for use with wood flour. In order to evaluate properties of blends and composites tensile tests, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analyses, and infrared spectroscopy have been performed. Wood flour seems to affect heavy blend behaviour in process production of material suggesting that future studies are needed to reduce defectiveness.

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Ngai, K. L., and C. M. Roland. "Models for the Component Dynamics in Blends and Mixtures." Rubber Chemistry and Technology 77, no. 3 (July 1, 2004): 579–90. http://dx.doi.org/10.5254/1.3547838.

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Abstract Four models for the component dynamics in polymer blends are briefly reviewed, with an emphasis on their ability to describe anomalous segmental relaxation behavior, secondary relaxations in blends, mixtures which include small molecules, and properties in the concentration limits of probe molecules and neat polymers. While general features of the segmental dynamics of polymer blends can be accounted for by all of these models, only that of the authors addresses all these particular aspects of blend dynamics. Our conclusion is that assessment of blend dynamics models should extend beyond intuitive appeal or general properties, with due attention given to the more subtle and exceptional behaviors.

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Muller, R., M. Bouquey, F. Mauguière, G. Schlatter, C. Serra, and J. Terrisse. "Rheology of Reactive Polymer Blends: Separation of Mixing and Reatcion Steps." Applied Rheology 11, no. 3 (June 1, 2001): 141–52. http://dx.doi.org/10.1515/arh-2001-0009.

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Abstract The crosslinking reaction in various types of polymer blends was followed by rheological measurements. Miscible polymers with controlled glass transition temperature, chain length and number of functional units per chain were synthesized by bulk radical copolymerization. Other experiments were carried out on immiscible systems based on commercial polymers. Blends were either prepared in a batch mixer or directly in the parallel-plate geometry of a rotational rheometer. Due to the low glass transition or melting temperature of most blend components, it was usually possible to separate the mixing step which was carried out at low temperature from the crosslinking reaction which was followed by small amplitude dynamic measurements at higher temperatures. The influence of several parameters on the reaction was studied, in particular : the reaction temperature, the amount of shear during the mixing step (or mixing time), the number of functional units per chain in each blend component and the blend composition. For the miscible blends, a master curve for the dependence of the elastic modulus G’ as a function of reaction time could be drawn for different functionalities and blend compositions.

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Zhuikov, Vsevolod A., Elizaveta A. Akoulina, Dariana V. Chesnokova, You Wenhao, Tatiana K. Makhina, Irina V. Demyanova, Yuliya V. Zhuikova, et al. "The Growth of 3T3 Fibroblasts on PHB, PLA and PHB/PLA Blend Films at Different Stages of Their Biodegradation In Vitro." Polymers 13, no. 1 (December 29, 2020): 108. http://dx.doi.org/10.3390/polym13010108.

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Over the past century there was a significant development and extensive application of biodegradable and biocompatible polymers for their biomedical applications. This research investigates the dynamic change in properties of biodegradable polymers: poly(3-hydroxybutyrate (PHB), poly-l-lactide (PLA), and their 50:50 blend (PHB/PLA)) during their hydrolytic non-enzymatic (in phosphate buffered saline (PBS), at pH = 7.4, 37 °C) and enzymatic degradation (in PBS supplemented with 0.25 mg/mL pancreatic lipase). 3T3 fibroblast proliferation on the polymer films experiencing different degradation durations was also studied. Enzymatic degradation significantly accelerated the degradation rate of polymers compared to non-enzymatic hydrolytic degradation, whereas the seeding of 3T3 cells on the polymer films accelerated only the PLA molecular weight loss. Surprisingly, the immiscible nature of PHB/PLA blend (showed by differential scanning calorimetry) led to a slower and more uniform enzymatic degradation in comparison with pure polymers, PHB and PLA, which displayed a two-stage degradation process. PHB/PLA blend also displayed relatively stable cell viability on films upon exposure to degradation of different durations, which was associated with the uneven distribution of cells on polymer films. Thus, the obtained data are of great benefit for designing biodegradable scaffolds based on polymer blends for tissue engineering.

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Estagy, Sara, Saeed Ostad Movahed, Soheil Yazdanbakhsh, and Majid Karim Nezhad. "STUDY OF THE FRIEDEL–CRAFT CO-CURING OF ETHYLENE–PROPYLENE–DIENE RUBBER AND STYRENE–BUTADIENE RUBBER." Rubber Chemistry and Technology 89, no. 3 (September 1, 2016): 540–56. http://dx.doi.org/10.5254/rct.16.83801.

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ABSTRACT Polymer blends are mixtures of at least two macromolecular species, polymers, and/or copolymers. A good blend should have strong interphases between different parts of the constituent polymers. To improve adhesion and miscibility of EPDM and SBR in their blends, a Lewis acid, AlCl3, was used to form EPDM-g-SBR copolymer through Friedel–Craft reactions. The effects of blend AlCl3 content, the diene monomer content of the EPDM, the EPDM–SBR weight ratio in the blend, the room temperature aging of the blend, and the type of the oil in the blend on cross-link reactions were studied. The results showed that an increase in AlCl3 content, up to 2 phr in the formulation, was beneficial to ΔTorque (difference between minimum and maximum torque in cure trace) and cross-link density (CLD) values of the compounds. The viscosity of the blends played a key role on AlCl3 curing of the compounds. As a general rule, the ΔTorque and CLD values tended to increase with diene monomer content of the EPDM. A high reduction in ΔTorque values was observed after 3 months of aging at room temperature. The oil incorporation was beneficial to cure parameters in the following order: oleic acid, paraffin oil, no oil, and aromatic oil, respectively. The EPDM–SBR weight ratios of 50:50 and/or 60:40 were demonstrated to be desired blend ratios.

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Dissertations / Theses on the topic "Polymers blend"

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Tuladhar, Sachetan Man. "Charge transport in conjugated polymers and polymer/fullerene Blends : influence of chemical structure, morphology and blend composition." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445260.

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Liu, Yee-Chen. "Polymer blend light-emitting diodes." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610709.

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ZHANG, GUOJUN. "CRYSTALLINE POLYMERS IN MULTILAYERED FILMS AND BLEND SYSTEMS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1404923073.

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Chen, Yuxuan. "Morphology Development of Block Copolymer and Homopolymer Blend Films." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1430870587.

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Mori, Daisuke. "Development of Polymer Blend Solar Cells Composed of Conjugated Donor and Acceptor Polymers." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199331.

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Wang, Shiping. "THICKNESS AND CRYSTALLINITY DEPENDENT SWELLING OF POLY (ETHYLENE OXIDE) /POLY (METHYL METHACRYLATE) BLEND FILMS." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1556831245474707.

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Albrecht, Mirko, and Michael Gehde. "Welding of incompatible thermoplastic polymers." Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-204024.

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Due to the wide range of properties of plastics (e.g. low density), more and more conventional materials are substituted by polymer materials. Complex requirement profiles on technical parts increase the demand for joining processes that enable the reliable joining of otherwise incompatible thermoplastics. In this case, material bonded connections are approaching their limits. In the following study two incompatible thermoplastic polymers were welded by using polymer blends that are compatible to both components. Industrially relevant thermoplastics polyethylene (PE) and polyamide 12 (PA12) were chosen to demonstrate the potential of an innovative joining technology.

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Yuan, Chuqing. "Topographic Pattern Directed Phase Separation in PAN/PMMA Blend Thin Films." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525754114090085.

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Gonçalves, Suely Patricia Costa [UNESP]. "Biodegradação de filmes de PHBV, PCL, PP e BLENDAS pela ação de microorganismos de solo." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/103940.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Neste trabalho, estudou-se a biodegradação dos filmes de PHB-V, PCL, PP e das blendas de PCL/PHB-V (4:1) e PP/PHB-V (4:1) em solo. Os filmes poliméricos foram preparados por compressão a quente e analisados através das análises de infravermelho com transformada de Fourier (FTIR), microscopia eletrônica de varredura (MEV), calorímetria exploratória diferencial (DSC), termogravimetria (TG) e difração de raio-X (DRX), para investigar os processos de biodegradação por um período de 120 dias. A atividade microbiana foi monitorada durante todo o período de experimento, bem como vários parâmetros: pH, temperatura, umidade, matéria orgânica, quantidade de CO2 e quantificação de microrganismos. Após os diferentes tempos do ensaio em solo, os filmes poliméricos apresentaram alterações quanto a sua estrutura molecular e morfologia em diferentes intensidades. Os processos de biodegradação observados nos diferentes filmes poliméricos, ocorreram via erosão superficial. O filme de PHB-V, foi o mais suscetível ao ataque microbiano, sendo completamente decomposto em 30 dias. O grau de cristalinidade de PHB-V permaneceu inalterado, pois a biodegradação ocorreu simultaneamente nas fases amorfa e cristalina. Para os filmes de PCL a biodegradação ocorreu tanto na fase amorfa como na interface do polímero. Os filmes de PP, após a biodegradação apresentaram uma ordenação na estrutura cristalina, denominada como “quemi-cristalização”. A biodegradação das blendas de PCL/PHB-V (4:1) e PP/PHB-V (4:1) ocorreu na interfase dos dois componentes da blenda, indicando que a imiscibilidade/morfologia são fatores que influenciam significativamente no processo de degradação.
In this works, we studied the biodegradation of the films of PHB-V, PCL, PP and the blends of PCL / PHB-V (4:1) and PP / PHB-V (4:1) in soil. The polymer films were prepared by melt-pressing and was evaluated by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetry (TGA) and X-ray diffraction (XRD), and investigated with respect to their microbial degradation in soil after 120 days. Microbial activity was monitored during the whole experiment, and various parameters: pH, temperature, moisture, organic matter, amount of CO2 and quantification of microorganisms. After different times of the test in soil, the polymer films showed changes in their molecular structure and morphology in different intensities. The processes of biodegradation observed in various polymer films, occurred via surface erosion. The film of PHB-V was the most susceptible to microbial attack and was completely decomposed in 30 days. The degree of crystallinity of PHB-V remained unchanged since the degradation occurred in both crystalline and amorphous phases. For films of PCL biodegradation occurred in both the amorphous phase as the interface of the polymer. The films of PP after biodegradation underwent an arrangement of the crystalline structure, known as chemi-crystallization. The biodegradation of the blends of PCL / PHB-V (4:1) and PP / PHB-V (4:1) occurred in the interphase of the two components of the blends, indicating that the immiscibility/morphology are factors that significantly influence the process of degradation.

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Kalloudis, Michail. "Thin polymer films of block copolymers and blend/nanoparticle composites." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7894.

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In this thesis, atomic force microscopy (AFM), transmission electron microscopy (TEM) and optical microscopy techniques were used to investigate systematically the self-assembled nanostructure behaviour of two different types of spin-cast polymer thin films: poly(isoprene-b-ethylene oxide), PI-b-PEO diblock copolymers and [poly(9,9-dioctylfluorene-co-benzothiadiazole)]:poly[9,9- dioctyfluorene-co-N-(4-butylphenyl)-diphenylamine], F8BT:TFB conjugated polymer blends. In the particular case of the polymer blend thin films, the morphology of their composites with cadmium selenide (CdSe) quantum dot (QD) nanoparticles was also investigated. For the diblock copolymer thin films, the behaviour of the nanostructures formed and the wetting behaviour on mica, varying the volume fraction of the PEO block (fPEO) and the average film thickness was explored. For the polymer blend films, the effect of the F8BT/TFB blend ratio (per weight), spin-coating parameters and solution concentration on the phase-separated nanodomains was investigated. The influence of the quantum dots on the phase separation when these were embedded in the F8BT:TFB thin films was also examined. It was found that in the case of PI-b-PEO copolymer thin films, robust nanostructures, which remained unchanged after heating/annealing and/or ageing, were obtained immediately after spin coating on hydrophilic mica substrates from aqueous solutions. The competition and coupling of the PEO crystallisation and the phase separation between the PEO and PI blocks determined the ultimate morphology of the thin films. Due to the great biocompatible properties of the PEO block (protein resistance), robust PEO-based nanostructures find important applications in the development of micro/nano patterns for biological and biomedical applications. It was also found that sub-micrometre length-scale phase-separated domains were formed in F8BT:TFB spin cast thin films. The nanophase-separated domains of F8BT-rich and TFB-rich areas were close to one order of magnitude smaller (in the lateral direction) than those reported in the literature. When the quantum dot nanoparticles were added to the blend thin films, it was found that the QDs prefer to lie in the F8BT areas alone. Furthermore, adding quantum dots to the system, purer F8BT and TFB nano-phase separated domains were obtained. Conjugated polymer blend thin films are excellent candidates for alternatives to the inorganic semiconductor materials for use in applications such as light emitting diodes and photovoltaic cells, mainly due to the ease of processing, low-cost fabrication and mechanical flexibility. The rather limited optoelectronic efficiency of the organic thin films can be significantly improved by adding inorganic semiconducting nanoparticles.

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Books on the topic "Polymers blend"

1

Functional polymer blends: Synthesis, properties, and performances. Boca Raton: CRC Press, 2012.

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J, Lohse David, ed. Polymeric compatibilizers: Uses and benefits in polymer blends. Munich: Hanser, 1996.

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Robeson, Lloyd M. Polymer blends: An introduction. Munich: Hanser, 2007.

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Robeson, Lloyd M. Polymer blends: A comprehensive review. Munich, Germany: Hanser, 2007.

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Utracki, L. A. Commercial Polymer Blends. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5789-0.

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Commercial polymer blends. London: Chapman & Hall, 1998.

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Utracki, L. A., and R. A. Weiss, eds. Multiphase Polymers: Blends and Ionomers. Washington, DC: American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0395.

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Bate, David Malcolm. Kinetics and mechanisms of the thermal degradation of some acrylic polymers and polymer blends. Birmingham: University of Birmingham, 1998.

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Walsh, D. J. Polymer Blends and Mixtures. Dordrecht: Springer Netherlands, 1985.

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E, Nesterov A., ed. Thermodynamics of polymer blends. Lancaster, PA: Technomic Pub., 1997.

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Book chapters on the topic "Polymers blend"

1

Gooch, Jan W. "Blend." In Encyclopedic Dictionary of Polymers, 85. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_1393.

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Gooch, Jan W. "Polymer Blend." In Encyclopedic Dictionary of Polymers, 563. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9121.

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Gooch, Jan W. "Intimate Blend." In Encyclopedic Dictionary of Polymers, 395. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_6426.

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Gooch, Jan W. "Dry Blend." In Encyclopedic Dictionary of Polymers, 245. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_4040.

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Gooch, Jan W. "Dry-Blend." In Encyclopedic Dictionary of Polymers, 245. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_4041.

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Gooch, Jan W. "Sandwich Blend." In Encyclopedic Dictionary of Polymers, 645. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10275.

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Gooch, Jan W. "Powder Blend." In Encyclopedic Dictionary of Polymers, 581. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9330.

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Gooch, Jan W. "Melt Blend." In Encyclopedic Dictionary of Polymers, 450. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7285.

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Nayak, Ganesh Chandra, and Chapal Kumar Das. "LCP Based Polymer Blend Nanocomposites." In Liquid Crystalline Polymers, 251–72. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22894-5_8.

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Covas, Jose A., Luiz Antonio Pessan, Ana V. Machado, and Nelson M. Larocca. "Polymer Blend Compatibilization by Copolymers and Functional Polymers." In Encyclopedia of Polymer Blends, 315–56. Weinheim, Germany: Wiley-VCH Verlag & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527805242.ch7.

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Conference papers on the topic "Polymers blend"

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Akhilesan, S., Susy Varughese, and C. Lakshmana Rao. "Electromechanical Behavior of Conductive Polyaniline/Poly (Vinyl Alcohol) Blend Films Under Uniaxial Loading." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-7937.

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Polyaniline (PANI) an electronically conducting polymer, and its charge transfer complexes are interesting engineering materials due to their unique electronic conductivity, electrochemical behavior, low raw material cost, ease of synthesis and environmental stability in comparison with other conjugated polymers. The main disadvantage of PANI is its limited processability. Blending of conducting polymers with insulating polymers is a good choice to overcome the processability problem. In this study a solution-blend method is adopted to prepare conductive polyaniline/polyvinyl alcohol (PANI/PVA) blend films at various blend ratios. Interest in applications for polyaniline (PANI) has motivated investigators to study its electro mechanical properties, and its use in polymer composites or blends with common polymers. The work described here looks at the uniaxial deformation behavior of the conducting polymer films and the anisotropic dependency of electrical conductivity of the blend films exposed to static and dynamic loading conditions. The relation between mechanical strain, electrical conductivity and film microstructure is investigated on PANI/PVA blend films.

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Song, Janice J., Jennifer Kowalski, and Hani E. Naguib. "Synthesis and Characterization of a Bio-Compatible Shape Memory Polymer Blend for Biomedical and Clinical Applications." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7452.

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Shape memory polymers (SMP) are a class of stimuli-responsive materials that are able to respond to external stimulus such as heat by altering their shape. Bio-compatible SMPs have a number of advantages over existing SMP materials and are being studied extensively for biomedical and clinical applications. Polymer blending has proved to be an effective method to improve the mechanical properties of polymers (such as tensile strength and toughness) as well as shape memory properties. In this study, we investigate the effect of blending two bio compatible polymers, thermoplastic polyurethane (TPU), a polymer with a high toughness and percent elongation, and poly-lactic acid (PLA), a stiff and strong polymer. The thermal, mechanical and thermo-mechanical (shape memory) properties of TPU/PLA blends were characterized in the following weight percent compositions: 80/20, 65/35, and 50/50 TPU/PLA. The TPU/PLA SMP blending was achieved with melt-blending and the tensile samples were fabricated with compression molding. The mechanical properties of each blend were studied at three different temperatures. The following thermo-mechanical (or shape memory) properties were also studied at each temperature: the shape fixity rate (Rf), shape recovery rate (Rr) and the effect of recovery temperature on the shape memory behavior. The microstructure of the polymer blends were investigated with an environmental scanning electron microscope (SEM). The results showed that the glass transition temperatures of the blends were similar to pure PLA. The toughness of the SMP blend increased with increasing TPU concentration and the tensile strength of the blend increased with PLA composition. The shape fixity rate of the TPU/PLA blend increased with increasing TPU content and the shape recovery rate increased with increasing deformation and recovery temperature. The various TPU/PLA SMP blends characterized in this study have the potential to be developed further for specific biomedical and clinical applications.

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Prakash, Asit, and Monica Katiyar. "White polymer light emitting diode using blend of fluorescent polymers." In 16th International Workshop on Physics of Semiconductor Devices, edited by Monica Katiyar, B. Mazhari, and Y. N. Mohapatra. SPIE, 2012. http://dx.doi.org/10.1117/12.928008.

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Hwang, Ho-Sang, Bum-Kyoung Seo, and Kune-Woo Lee. "Strippable Core-Shell Polymer Emulsion for Decontamination of Radioactive Surface Contamination." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40193.

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In this study, the core-shell composite polymer for decontamination from the surface contamination was synthesized by the method of emulsion polymerization and blends of polymers. The strippable polymer emulsion is composed of the poly(styrene-ethyl acrylate) [poly(St-EA)] composite polymer, poly(vinyl alcohol) (PVA) and polyvinylpyrrolidone (PVP). The morphology of the poly(St-EA) composite emulsion particle was core-shell structure, with polystyrene (PS) as the core and poly(ethyl acrylate) (PEA) as the shell. Core-shell polymers of styrene (St)/ethyl acrylate (EA) pair were prepared by sequential emulsion polymerization in the presence of sodium dodecyl sulfate (SDS) as an emulsifier using ammonium persulfate (APS) as an initiator. Related tests and analysis confirmed the success in synthesis of composite polymer. The products are characterized by FT-IR spectroscopy, TGA that were used, respectively, to show the structure, the thermal stability of the prepared polymer. Two-phase particles with a core-shell structure were obtained in experiments where the estimated glass transition temperature and the morphologies of emulsion particles. Decontamination factors of the strippable polymeric emulsion were evaluated with the polymer blend contents.

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5

Mistretta, M. C., M. Ceraulo, F. P. La Mantia, and M. Morreale. "Compatibilization of a polyethylene/polyamide 6 blend nanocomposite." In TIMES OF POLYMERS (TOP) AND COMPOSITES 2014: Proceedings of the 7th International Conference on Times of Polymers (TOP) and Composites. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4876871.

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Zicans, Janis, Remo Merijs Meri, Tatjana Ivanova, Rita Berzina, Martins Kalnins, and Roberts Maksimovs. "Nanoclay modified polycarbonate blend nanocomposites: Calorimetric and mechanical properties." In TIMES OF POLYMERS (TOP) AND COMPOSITES 2014: Proceedings of the 7th International Conference on Times of Polymers (TOP) and Composites. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4876861.

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Mohammadi, Mohsen, Ali A. Yousefi, Morteza Ehsani, A. D’Amore, Domenico Acierno, and Luigi Grassia. "Investigation of PE blend films through CIE L∗C∗h color scale." In V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2010. http://dx.doi.org/10.1063/1.3455628.

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Chervanyov, A. I. "Polymer mediated interactions between fillers immersed in a polymer blend." In 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045907.

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Mallick, Shoaib, Zubair Ahmad, and Farid Touati. "Polymer Nanocomposite-based Moisture Sensors for Monitoring of the Water Contents in the Natural Gas Pipelines." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0073.

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In this study, the polymer-based humidity sensors were investigated for humidity sensing applications. The key advantages of polymers that have garnered this attraction are their lightweight, easy preparation, and low cost of both materials and fabrication process. Different techniques are used to enhance the surface morphology and sensitivity of polymeric films, which include synthesis of nanocomposites, copolymerization techniques, and blending of polymers. The incorporation of nanoparticles to the polymer matrix improves the electrical and mechanical properties of the polymeric film. We have investigated different polymer nanocomposites based humidity sensors on enhancing the sensitivity of the sensor, on achieving faster response and recovery time and lower hysteresis loss as compared to the polymeric humidity sensors. In the first phase, we investigated the PLA-TiO2 nanocomposite for humidity sensing applications. We have optimized the concentration of TiO2 in the PLA-TiO2 nanocomposite and apply acetone for the surface treatment of the sensing film. In the second phase, we studied the PVDF-TiO2 nanocomposite-based humidity sensor, achieved a linear response of the sensor, and optimized the concentration of PVDF. In the third phase, we incorporated the BaTiO3 nanoparticles within optimized PVDF and studied the dielectric property of the nanocomposite film. PVDF-BaTiO3 sensors show a smaller hysteresis response. In the 4th phase, we blend the PVDF with SPEEK polymer; the optimized concentration of SPEEK improves the sensitivity of the humidity sensors at a lower humidity level.

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Zhang, Wei, Donggang Yao, and Jack G. Zhou. "Controllable Growth of Gradient Structures for Biomedical Applications." In ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13122.

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Co-continuous phase structures of immiscible polymers can be developed under appropriate melt-blending conditions. Because of the presence of interfacial tension, such co-continuous structures start to coarsen when heated to a temperature higher than the melting/softening temperature of both phases. In this article, a systemic study of controllable growth of gradient porous structures utilizing variable coarsening rates in either a gradient temperature field or a gradient shear field is presented. Based on experimental results, the gradient of shear viscosity is identified as the mechanism for generating variable coarsening rates inside a co-continuous blend. By controllable variation of the shear viscosity distribution in a blend, a spatially varied and controllable gradient in phase structure is created. After dissolution of one of the two phases, the desired porous structure of the remaining polymer is obtained. A poly (lactic acid) (PLA)/polystyrene (PS) 50/50 wt% blend was used as a model system. By designing proper thermal and/or dynamic boundary conditions and introducing different thermal/shear rate gradients during annealing, several gradient porous structures of PLA were created.

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Reports on the topic "Polymers blend"

1

Mulkern, Thomas J., Donovan Harris, and Alan R. Teets. Epoxy Functionalized Hyberbranched Polymer/Epoxy Blends. Fort Belvoir, VA: Defense Technical Information Center, December 1999. http://dx.doi.org/10.21236/ada372416.

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2

Rafailovich, M., and J. Sokolov. Surface and interfacial properties of polymer blends. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/6048397.

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Datta, A., J. P. De Souza, A. P. Sukhadia, and D. G. Baird. Processing Studies of Blends of Polypropylene with Liquid Crystalline Polymers. Fort Belvoir, VA: Defense Technical Information Center, January 1991. http://dx.doi.org/10.21236/ada232961.

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Fabish, T. J., W. F. Lynn, R. J. Passinault, A. Vreugdenhil, and B. Metz. High Performance Flat Coatings Through Compatibilized Immiscible Polymer Blends. Fort Belvoir, VA: Defense Technical Information Center, July 1999. http://dx.doi.org/10.21236/ada375878.

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Chu, B. Phase transition in polymer blends and structure of ionomers. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/5362446.

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Anastasiadis, S. H., I. Gancarz, and J. T. Koberstein. Interfacial Tension of Immiscible Polymer Blends: Temperature and Molecular Weight Dependence. Fort Belvoir, VA: Defense Technical Information Center, February 1988. http://dx.doi.org/10.21236/ada192463.

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Naslund, Robert A., and Phillip L. Jones. Characterization of Thermotropic Liquid Crystalline Polymer Blends by Positron Annihilation Lifetime Spectroscopy. Fort Belvoir, VA: Defense Technical Information Center, July 1992. http://dx.doi.org/10.21236/ada253616.

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Yang, Arthur, Roman Domszy, and Jeff Yang. A New Generation of Building Insulation by Foaming Polymer Blend Materials with CO₂. Office of Scientific and Technical Information (OSTI), March 2016. http://dx.doi.org/10.2172/1244652.

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9

Rafailovich, M., and J. Sokolov. Determination of concentration profiles at interfaces and surfaces of partially miscible polymer blends. Office of Scientific and Technical Information (OSTI), April 1993. http://dx.doi.org/10.2172/6583481.

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Rafailovich, M., and J. Sokolov. Surface and interfacial properties of polymer blends. Progress report, September 25, 1990--December 24, 1991. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/10107795.

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