Journal of Research Updates in Polymer Science最新文献_第8页

Effect of Side Chain Length on Segregation of Squalane between Smectic Layers Formed by Rod-Like Polysilanes 侧链长度对棒状聚硅烷近晶层间角鲨烷分离的影响

Journal of Research Updates in Polymer Science Pub Date : 2018-05-07 DOI: 10.6000/1929-5995.2018.07.01.1

T. Tanaka, Itsuki Kato, K. Okoshi

引用次数: 1

Comparative Study on Experimental and Kerner Model Predictions of Viscoelastic Properties of Polyamide 6/ Polyvinyl Alcohol Blends 聚酰胺6/聚乙烯醇共混物粘弹性实验与Kerner模型预测的比较研究

Journal of Research Updates in Polymer Science Pub Date : 2018-05-07 DOI: 10.6000/1929-5995.2018.07.01.3

K. G. Pradeepa, G. M. Shashidhara

{"title":"Comparative Study on Experimental and Kerner Model Predictions of Viscoelastic Properties of Polyamide 6/ Polyvinyl Alcohol Blends","authors":"K. G. Pradeepa, G. M. Shashidhara","doi":"10.6000/1929-5995.2018.07.01.3","DOIUrl":"https://doi.org/10.6000/1929-5995.2018.07.01.3","url":null,"abstract":"The Polyamide 6 (PA6) / Polyvinyl alcohol (PVOH) blends of different compositions (80/20, 60/40 and 50/50) were prepared by melt mixing in a Haake Rheomixer. The selected blend systems (80/20 and 60/40) were modified with dicumyl peroxide (DCP) and tertiary butyl cumyl peroxide (TBCP). The dynamic mechanical properties of blends were systematically investigated with special reference to the effect of blend ratio and effect of presence of peroxide over a temperature range -20°C to 110°C. The effect of change in the composition of the polymer blends on tan ? was studied to understand the damping characteristics. The mean field theory developed by Kerner has been used to estimate the dynamic properties and the estimated values are compared with the experimental values. The loss tangent curve of the blend exhibited single transition peak corresponding to the glass transition temperature (T g ) of Polyamide 6. Kerner model was found to satisfactorily predict the viscoelastic properties of the blends with polyamide content in the range 50 to 80 wt% assuming PA6 as matrix and for all compositions except 80/20 assuming PVOH as matrix. The Kerner model predictions for the selected blend systems with peroxides are not satisfactory and the co-continuous morphology of the peroxide treated blends were revealed by SEM observations.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89012623","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: 1

Generation of Energy from a Single Fuel Cell Using Synthesized Solid Electrolyte Membrane from Functionalized Polyisoprene/ Carbon Nanotubes 利用功能化聚异戊二烯/碳纳米管合成固体电解质膜从单个燃料电池中产生能量

Journal of Research Updates in Polymer Science Pub Date : 2018-05-05 DOI: 10.6000/1929-5995.2018.07.01.2

C. A. Idibie, K. J. Awatefe, R. O. Ogboru

{"title":"Generation of Energy from a Single Fuel Cell Using Synthesized Solid Electrolyte Membrane from Functionalized Polyisoprene/ Carbon Nanotubes","authors":"C. A. Idibie, K. J. Awatefe, R. O. Ogboru","doi":"10.6000/1929-5995.2018.07.01.2","DOIUrl":"https://doi.org/10.6000/1929-5995.2018.07.01.2","url":null,"abstract":"Study on the electrical energy generated from a single fuel cell using a synthesized solid electrolyte membrane from polyisoprene that was impregnated with carbonanotubes was carried out. The initial functionalization of the polymer yielded an ion exchange capacity (IEC) of 4.04, 7.82, 11.1 and 15.53 mmol/g with their corresponding degrees of sulphonation (DS) of 10.93, 21.1, 30.03 and 42.02 %, respectively. The later but highest DS achieved water uptake of 49.23 wt % and proton conductivities of 4.3 x 10 -3 , 1.2 x 10 -3 and 2.6 x 10 -2 S/cm for membrane of thickness 250, 215 and 120 mm, respectively. The performance testing of the membrane in a single fuel cell achieved an open circuit voltage (OCV) of 647.23 mV with the synthesised membrane of 35 wt % catalyst loading, 589.79 mV and 410.48 mV of 25 wt % and 15 wt % catalyst loading, respectively at constant DS (42.02 %). Their corresponding power densities achieved were 68.67, 49.20 and 35.83 Mw/cm 2 , respectively. Thus the functionalization of polyisoprene impregnated with carbon nanotubes through the process of sulphonation with chlorosulphonic acid resulted into the development of solid polymer electrolyte membrane for fuel cell application.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77379289","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

Fabrication and Characterization of Antibacterial and Biodegradable Facial Tissue Papers Using Bio-Based Raw Materials: Effect of Glycerin 用生物基原料制备抗菌和可生物降解面巾纸及其性能:甘油的作用

Journal of Research Updates in Polymer Science Pub Date : 2017-12-28 DOI: 10.6000/1929-5995.2017.06.04.2

Khandaker Umaiya, A. Chowdhury, R. Khan

引用次数: 1

Direct Impedimetric Detection and Isolation of Bacillus Cereus using Modified Platinum Electrode 修饰铂电极直接阻抗法检测分离蜡样芽孢杆菌

Journal of Research Updates in Polymer Science Pub Date : 2017-12-28 DOI: 10.6000/1929-5995.2017.06.04.1

Aashis S. Roy, Praveen C Ramamurthy

{"title":"Direct Impedimetric Detection and Isolation of Bacillus Cereus using Modified Platinum Electrode","authors":"Aashis S. Roy, Praveen C Ramamurthy","doi":"10.6000/1929-5995.2017.06.04.1","DOIUrl":"https://doi.org/10.6000/1929-5995.2017.06.04.1","url":null,"abstract":"Abstract: This work proposes a technique for isolation of bacteria using magnetic nanoparticles. The magnetic nanoparticles that are prepared by a sol-gel method using citric acid and nano-ferrites are characterized for structural and morphology by X-ray diffraction (XRD) and Transmission electron microscope (TEM), respectively. The prepared nano-ferrites coated with poly vinyl alcohol (PVA) over platinum electrode are used for detection of Bacillus Cereus. The isolated bacterial cells from colloidal solution are treated with zinc ferrite for 12 h, and it is observed that the cells are coagulated with the nanoparticle when allowed to settle down. This is further filtered by different size of filter paper to get less than 0.1% of cells in water. Various electrochemical parameters like cyclovoltammetry (CV), sweep step function, Tafel plot, AC impedance are studied employing the modified platinum electrode. It is observed through CV graph that the peaks are formed at -0.25 V due to the oxidation of bacterial cells, which is further supported by sweep step function graph. Therefore, this is one of the economically efficient techniques to detect and isolate the Bacillus cereus from a colloidal solution.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91291610","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

A Review Study on the Traditional Machining of Composite Materials 复合材料传统加工研究综述

Journal of Research Updates in Polymer Science Pub Date : 2017-12-28 DOI: 10.6000/1929-5995.2017.06.04.4

H. M. Ali

引用次数: 1

Using Riboflavin as Low Molecular Mass Gelator for the Preparation of a New Network Structure Having Spiroacetal Moieties 以核黄素为低分子质量凝胶制备具有螺缩醛基团的新型网状结构

Journal of Research Updates in Polymer Science Pub Date : 2017-12-28 DOI: 10.6000/1929-5995.2017.06.04.3

A. Diaconu, A. Rusu, L. Nita, A. Chiriac, I. Neamţu

引用次数: 3

Long-Term Performance of Electrodes Based on Vinyl Acetate Homo-Polymer Binder 基于醋酸乙烯基聚合物粘结剂电极的长期性能研究

Journal of Research Updates in Polymer Science Pub Date : 2017-10-04 DOI: 10.6000/1929-5995.2017.06.03.1

P. Prosini, M. D. Carli, L. D. Seta, M. Carewska, Ivan Fuso Nerini

{"title":"Long-Term Performance of Electrodes Based on Vinyl Acetate Homo-Polymer Binder","authors":"P. Prosini, M. D. Carli, L. D. Seta, M. Carewska, Ivan Fuso Nerini","doi":"10.6000/1929-5995.2017.06.03.1","DOIUrl":"https://doi.org/10.6000/1929-5995.2017.06.03.1","url":null,"abstract":"In this work we propose the use of a hydro-dispersible polymer such as the poly vinyl acetate as a binder for the production of electrodes for lithium-ion batteries. To increase the film forming properties of the polymer the poly vinyl was added with triacetin that acts as a plasticizer. The electrochemical stability of the polymer was tested by a polarizing electrode, formed by mixing the polymer with carbon. Subsequently, an electrode tape was prepared by using LiNi 0.5 Mn 1.5 O 4 as the active material and characterized by SEM, EDS and TGA. Lithium metal cells were assembled and tested to evaluate specific capacity, power and energy density at various discharge rates. The cycle life of the cell was evaluated by galvanostatic charge/discharge cycles. The tests showed that the electrodes prepared with PVA plasticized with triacetin have very good electrochemical performance in terms of capacity retention as a function of the discharge rate and the cycle number. Our work demonstrates that the use of triacetin to plasticize the PVA allows to increase the electrochemical stability of the electrode likely due to an improvement of the slurry filmability. The proposed method could represent a promising technology for the production of long-term performance lithium batteries.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87362675","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

Consecutive Removal of Hazardous Dyes from Aqueous Solutions by Composite hydrogels Based on Rice Straw 秸秆复合水凝胶连续去除水溶液中有害染料的研究

Journal of Research Updates in Polymer Science Pub Date : 2017-10-04 DOI: 10.6000/1929-5995.2017.06.03.4

G. Mahmoud, S. Abdel-Aal, A. Elbayaa, N. Badway, Doaa. F. Ahmed

{"title":"Consecutive Removal of Hazardous Dyes from Aqueous Solutions by Composite hydrogels Based on Rice Straw","authors":"G. Mahmoud, S. Abdel-Aal, A. Elbayaa, N. Badway, Doaa. F. Ahmed","doi":"10.6000/1929-5995.2017.06.03.4","DOIUrl":"https://doi.org/10.6000/1929-5995.2017.06.03.4","url":null,"abstract":"The composite hydrogels based on rice straw (RS) and N-vinyl-2-pyrrolidone (NVP) or acrylamide (AAm) were successfully prepared by gamma irradiation. The effect of the radiation dose and the monomer content on the gel percent was studied. The composite hydrogels were confirmed by (FTIR), (TGA) and (SEM). It was found that the diffusion of water into the prepared composites was Fickian character. The removal of congo red (CR) and methyl orange (MO) dyes by (NVP/RS) and (AAm/RS) composite hydrogels were investigated as a function of the pH, contact time, initial dye concentration solution and temperature. It was achieved that the adsorption capacity of (NVP/RS) composite hydrogel towards (CR) and (MO) was higher than (AAm/RS) one. The kinetic data was tested by the pseudo-ﬁrst-order and the pseudo-second-order kinetic models. The adsorption isotherm was closely fitted with the Freundlich model for adsorption of CR and MO onto (NVP/RS) and the Langmuir model for adsorption of the dyes onto (AAm/RS). A high adsorption capacity was obtained in the second adsorption cycle of MO onto the composite hydrogels loaded with CR. Improvement in the adsorption of MO onto (NVP/RS) and (AAm/ RS) composite hydrogels loaded with Co(II).","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84641245","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

Preparation and In Vitro Drug Release Behavior of 1,10-Phenanthroline/Î²-cyclodextrinâ€“poly (Glycidyl Methacrylate) Drug-Loaded Microspheres 1,10-菲罗啉/Î²-环糊精<e:2> -聚甲基丙烯酸缩水甘油酯载药微球的制备及体外释药行为

Journal of Research Updates in Polymer Science Pub Date : 2017-10-04 DOI: 10.6000/1929-5995.2017.06.03.3

Ya Li, W. Zhen

{"title":"Preparation and In Vitro Drug Release Behavior of 1,10-Phenanthroline/Î²-cyclodextrinâ€“poly (Glycidyl Methacrylate) Drug-Loaded Microspheres","authors":"Ya Li, W. Zhen","doi":"10.6000/1929-5995.2017.06.03.3","DOIUrl":"https://doi.org/10.6000/1929-5995.2017.06.03.3","url":null,"abstract":"In this study, novel star-shaped polymers of I²-cyclodextrin (I²-CD)â€“poly (glycidyl methacrylate) (PGMA) were prepared by atom transfer radical polymerization (ATRP), formed from GMA and I²-CD. In addition, the structure, properties and hydrophilicity of the I²-CD-PGMA polymers thus prepared were systematically analyzed. 1,10-phenanthroline monohydrate (Phen)/I²-CD-PGMA drug-loaded microspheres were prepared by emulsion solvent evaporation. The optimum preparation conditions were determined by orthogonal tests. Analysis results indicated that the performance of star-shaped polymers of I²-CD-PGMA clearly changes, resulting in the increase of the contact angle from 17Â° to 72.5Â°, and their thermal degradation temperature was enhanced from 260 Â°C to 401 Â°C. Moreover, I²-CD-PGMA drug-loaded microspheres with a smooth, spherical surface were successfully prepared, and the drug-loading capacity and average particle size of drug-loaded microspheres were 26.67 % and 10 I¼m, respectively. Drug release tests indicated that the release behavior of I²-CD-PGMA drug-loaded microspheres conformed to Higuchi release kinetics, which exhibited a significant drug delivery capability. The release rate and utilization of I²-CD-PGMA were greater than that of I²-CD, demonstrating that I²-CD-PGMA was more suitable as a drug delivery material.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80284192","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