Journal of Polymer Science and Engineering最新文献_第2页

Exact analysis of MHD Walters’-B fluid flow with non-singular fractional derivatives of Caputo-Fabrizio in the presence of radiation and chemical reaction 用Caputo-Fabrizio非奇异分数阶导数精确分析辐射和化学反应下MHD Walters ' -B流体流动

Journal of Polymer Science and Engineering Pub Date : 2018-08-28 DOI: 10.24294/JPSE.V1I2.599

Muhammad Imran Asjad, Maryam Aleem, M. Riaz

{"title":"Exact analysis of MHD Walters’-B fluid flow with non-singular fractional derivatives of Caputo-Fabrizio in the presence of radiation and chemical reaction","authors":"Muhammad Imran Asjad, Maryam Aleem, M. Riaz","doi":"10.24294/JPSE.V1I2.599","DOIUrl":"https://doi.org/10.24294/JPSE.V1I2.599","url":null,"abstract":"The present article reports the applications of Caputo-Fabrizio time-fractional derivatives. This article generalizes the idea of unsteady MHD free convective flow in a Walters.-B fluid with heat and mass transfer study over an exponential isothermal vertical plate embedded in a porous medium. The governing equations are converted into dimensionless form and extended to fractional model. The generalized Walters-B fluid model has been solved analytically using the Laplace transform technique. From the general solutions we reduce limiting solutions when to the similar motion for Newtonian fluid. The corresponding expressions for and Nusselt and Sherwood numbers are also assessed. Numerical results for velocity, temperature and concentration are demonstrated graphically for various factors of interest and discussed. As a result, we have plotted the influence of fractional parameter on fluid flow and drawn comparison between fractional Walters’-B and fractional Newtonian fluid and found that fractional Newtonian fluid is faster than fractional Walters’-B fluids.","PeriodicalId":169794,"journal":{"name":"Journal of Polymer Science and Engineering","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125883439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Reaction Mechanism and kinetics of In-Situ Polymerization of Pyrrole onto Textiles: A Review 纺织品上吡咯原位聚合反应机理及动力学研究进展

Journal of Polymer Science and Engineering Pub Date : 2018-08-28 DOI: 10.24294/JPSE.V1I2.500

S. Maity

{"title":"Reaction Mechanism and kinetics of In-Situ Polymerization of Pyrrole onto Textiles: A Review","authors":"S. Maity","doi":"10.24294/JPSE.V1I2.500","DOIUrl":"https://doi.org/10.24294/JPSE.V1I2.500","url":null,"abstract":"Research of electro-conductive textiles based on conductive polymers like polypyrrole, has increased in the recent years due to their high potential applications in various field. Conductive polymers behave like insulator in their neutral states with typical electrical conductivity in the range 10-10 to 10-25 Scm-1. These neutral polymers can be converted into semi-conductive or conductive states with conductivities range of 1 Scm-1 to 10-4 Scm-1 through chemical or electro-chemical redox reactions. By the applications of these polymers onto a textile surface, we can be able to obtain novel composites which are strong, flexible, light weight and highly electro-conductive. These textile composites are suitable for applications such as heating pads, sensors, corrosion-protecting materials, actuators, electrochromic devices, EMI shielding etc. The methods of applications of conductive polymers onto the textile surface such as in-situ chemical, in-situ electro-chemical, in-situ vapor phase, in-situ polymerization in a supercritical fluid, solution coating process are described here briefly. Merits and demerits of these methods are mentioned here. Reaction mechanisms of chemical and electro-chemical polymerization proposed by the different researcher are described. Different factors affecting the kinetics of chemical and electro-chemical polymerization are accounted. Influence of textile materials on the kinetics of chemical polymerization is reviewed and reported.","PeriodicalId":169794,"journal":{"name":"Journal of Polymer Science and Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127907113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polyblends and composites of poly (lactic acid) (PLA): a review on the state of the art 聚乳酸(PLA)的共混物和复合材料的研究进展

Journal of Polymer Science and Engineering Pub Date : 2018-08-28 DOI: 10.24294/jpse.v1i3.723

Krishna Prasad Rajan1, Selvin P. Thomas12, Aravinthan Gopanna2, Ahmed Al-Ghamdi1, Murthy Chavali3

{"title":"Polyblends and composites of poly (lactic acid) (PLA): a review on the state of the art","authors":"Krishna Prasad Rajan1, Selvin P. Thomas12, Aravinthan Gopanna2, Ahmed Al-Ghamdi1, Murthy Chavali3","doi":"10.24294/jpse.v1i3.723","DOIUrl":"https://doi.org/10.24294/jpse.v1i3.723","url":null,"abstract":"Polymers obtained from renewable sources are gaining popularity over their petroleum based counter parts in recent years due to their capability to address the environmental pollution related concerns emanating from the widespread usage of synthetic polymers. Even though the polymers from renewable sources are attractive in an environmental point of view, some of the property limitations and the high cost of these materials pose limitations for their extensive commercial applications. These aspects opened the door for a large chunk of research activities in development of polyblends and composites containing polymers from renewable sources as one of the components. Poly (lactic acid) (PLA) is one of the most discussed and commercialized polymer originated from renewable resources. Even though it has many useful properties, certain disadvantages like high brittleness, low impact resistance etc. limit the wide spread commercialization of PLA. In this review article, the recent research activities which are aimed to fill this gap by various modifications of PLA are discussed with special emphasis on the latest research advancements in the field of biodegradable and non biodegradable systems containing PLA.","PeriodicalId":169794,"journal":{"name":"Journal of Polymer Science and Engineering","volume":"215 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115511047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Application of vegetable oil-based biopolyols in manufacturing of rigid polyurethane foams – short review 植物油基生物多元醇在硬质聚氨酯泡沫制造中的应用综述

Journal of Polymer Science and Engineering Pub Date : 2018-08-28 DOI: 10.24294/JPSE.V1I3.648

A. Hejna

引用次数: 2

Preparation of defect free TFC FO membranes using robust and highly porous ceramic substrate 利用坚固和高多孔陶瓷衬底制备无缺陷TFC - FO膜

Journal of Polymer Science and Engineering Pub Date : 2018-08-28 DOI: 10.24294/JPSE.V1I4.413

J. Su, Yanyan Wei, Hui Li

{"title":"Preparation of defect free TFC FO membranes using robust and highly porous ceramic substrate","authors":"J. Su, Yanyan Wei, Hui Li","doi":"10.24294/JPSE.V1I4.413","DOIUrl":"https://doi.org/10.24294/JPSE.V1I4.413","url":null,"abstract":"In this study, robust and defect-free thin film composite (TFC) forward osmosis (FO) membranes have been successfully fabricated using ceramic hollow fibers as the substrate. Polydopamine (PDA) coating under controlled conditions is effective to reduce the surface pores of the substrate and make the substrate smooth enough for the interfacial polymerization. The pure water permeability (A), solute permeability (B) and structural parameter (S) of the resultant FO membrane are 0.854 L·m-2h-1bar-1 (LMH/Bar) 0.186 L·m-2h-1 (LMH) and 1720 µm, respectively. The water flux and reverse draw solute flux are measured using NaCl and proprietary ferric sodium citrate (FeNaCA) draw solutions at low and high osmotic pressure ranges. With increasing the osmotic pressure, higher water flux is obtained but its increase is not directly proportional to the increase in the osmotic pressure. At the membrane surface, the effect of dilutive concentration polarization is much less serious for FeNaCA draw solutions. At an osmotic pressure of 89.6 bar, the developed TFC membrane generates water fluxes of 11.5 and 30.0 LMH using NaCl and synthesized FeNaCA draw solutions. The corresponding reverse draw solute flux is 7.0 g·m-2h-1 (gMH) for NaCl draw solution but it is not detectable for FeNaCA draw solution. This means that the developed TFC FO membranes are defect free and their surface pores are at molecular level. The performance of the developed TFC FO membranes are also demonstrated for the enrichment of BSA protein.","PeriodicalId":169794,"journal":{"name":"Journal of Polymer Science and Engineering","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123464743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0