Journal of Research Updates in Polymer Science最新文献_第10页

Formation Features of Hybrid Magnetic Materials Based on Polyphenoxazine and Magnetite Nanoparticles 基于多苯恶嗪和磁铁矿纳米颗粒的杂化磁性材料的形成特征

Journal of Research Updates in Polymer Science Pub Date : 2017-01-23 DOI: 10.6000/1929-5995.2016.05.04.2

S. Ozkan, G. Karpacheva, E. Dzidziguri, P. Chernavskii, G. Bondarenko, G. Pankina

引用次数: 3

Computer Integrated Manufacturing of Polyurethane Foams Steered by Measured and Calculated Data in Comparison 以实测数据与计算数据对比为指导的聚氨酯泡沫塑料计算机集成制造

Journal of Research Updates in Polymer Science Pub Date : 2017-01-23 DOI: 10.6000/1929-5995.2016.05.04.1

H. Horacek

{"title":"Computer Integrated Manufacturing of Polyurethane Foams Steered by Measured and Calculated Data in Comparison","authors":"H. Horacek","doi":"10.6000/1929-5995.2016.05.04.1","DOIUrl":"https://doi.org/10.6000/1929-5995.2016.05.04.1","url":null,"abstract":"Polyurethane foams were manufactured under continuous measurements of isocyanate content, temperature, expansion and viscosity. Parallel model calculations were executed based on the driving force of 50kJ/mole heat of reaction of the energy rich isocyanate group and on thermodynamic balances of weight and heat of formation as well as on a kinetic model using a first order reaction for the isocyanate consumption and a relation for the viscosity dependent on conversion and on a viscosity constant. The agreement between continuous measured and calculated data was satisfying. The parameters isocyanate content, temperature, expansion and viscosity controlled and steered the variables of the production plant, like dosage of components, temperature and conveyer speed. The kinetic model was also valid for polyurethane foams with additives, which did not react with components of foam, like flame retardants or pigments. The thermodynamic balances of weight and heat predicted residues and consumed heats by degradation under fire, which correlated with those measured by TGA and DSC. The target was to establish computer integrated manufacturing without continuous measurements but by mere model calculation. This was possible with the knowledge of the first order velocity constant and the viscosity constant.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90328692","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

Use of High- Range Water Reducer to Mitigate the Detrimental Effect of Recycled Acrylic- Based Polymers on Concrete Performance 使用高范围减水剂减轻再生丙烯酸基聚合物对混凝土性能的不利影响

Journal of Research Updates in Polymer Science Pub Date : 2017-01-23 DOI: 10.6000/1929-5995.2016.05.04.4

J. Assaad

{"title":"Use of High- Range Water Reducer to Mitigate the Detrimental Effect of Recycled Acrylic- Based Polymers on Concrete Performance","authors":"J. Assaad","doi":"10.6000/1929-5995.2016.05.04.4","DOIUrl":"https://doi.org/10.6000/1929-5995.2016.05.04.4","url":null,"abstract":"The incorporation of recycled polymers from waste latex paints (WLPs) in concrete manufacturing is very limited. In fact, this practice cannot be formally implemented without thorough assessment of the various implications that could result from WLP additions on concrete properties. This paper seeks to provide better understanding on effect of WLP constituents and substitution rates on concrete fresh and mechanical properties. It also examines the effect of incorporating naphthalene-based high-range water reducer (HRWR) to mitigate the detrimental effects associated with such additions. Tested WLPs were not randomly collected from waste collection sites; rather produced to assure full traceability of composition and then stored for around 1-year to expire. Test results have shown that workability, setting time, and hardened properties of concrete are directly affected by the polymer latex type and content including the pigment/extender ratio. The use of HRWR is efficient to control work ability and its loss over time when WLPs are disposed in concrete at relatively high rate of 10% of mixing water. The incorporation of HRWR should be coupled with certain reduction in free water to control the drop in compressive strength and bond to embedded steel bars.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87795676","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 Statistical Analysis of Epoxy Polymer Reinforced with Micro Ceramic Particles 微陶瓷颗粒增强环氧聚合物的统计分析

Journal of Research Updates in Polymer Science Pub Date : 2016-11-08 DOI: 10.6000/1929-5995.2016.05.03.3

Arthur Bernardes Lara Melo, LuÃs Fernando Lucas Paiva, JÃºlio Cesar dos Santos, T.H. Panzera, R. Freire

引用次数: 7

Effect of Non-Rubber Constituents on Guayule and Hevea Rubber Intrinsic Properties 非橡胶成分对银胶菊和橡胶树橡胶特性的影响

Journal of Research Updates in Polymer Science Pub Date : 2016-11-08 DOI: 10.6000/1929-5995.2016.05.03.1

Shirin Monadjemi, C. McMahan, K. Cornish

{"title":"Effect of Non-Rubber Constituents on Guayule and Hevea Rubber Intrinsic Properties","authors":"Shirin Monadjemi, C. McMahan, K. Cornish","doi":"10.6000/1929-5995.2016.05.03.1","DOIUrl":"https://doi.org/10.6000/1929-5995.2016.05.03.1","url":null,"abstract":"To meet the increasing demand for natural rubber (NR), currently sourced from the tropical rubber tree Hevea brasiliensis , and address price volatility and steadily increasing labor costs, alternate rubber-producing species are in commercial development. One of these, guayule ( Parthenium argentatum ), has emerged on the market as a commercial source of high quality rubber. Non-rubber constituents play an important role in the physical properties of NR products. The intrinsic composition of the two NR materials differs and these differences may be a principal cause of the performance differences between them. We have compared the effect of non-rubber constituents, such as protein, lipids, resin and rubber particle membranes. Firstly, a film casting method was developed to obtain rubber films with a uniform thickness. Secondly, the glass transition temperature of different rubbers was determined by dynamic mechanical analysis, and tensile properties were tested for uncompounded materials. Guayule natural rubber (GNR), from which most of the membranes were removed while in latex form (MRGNR) was found to have higher intrinsic strength than GNR or gel-free NR (FNR). An acetone extraction was performed to quantify the resin and free lipids in the rubber samples.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85252223","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: 16

Soy Protein Isolate/Poly (Vinyl Alcohol) Films with IPN Structure by Crosslinkage of Ferulic Acid 阿魏酸交联制备IPN结构大豆分离蛋白/聚乙烯醇膜

Journal of Research Updates in Polymer Science Pub Date : 2016-11-08 DOI: 10.6000/1929-5995.2016.05.03.4

J. Su, Yingyuan Wang, Shan Han, Xiao-long Zhang

引用次数: 1

A Review of Backup Mechanism for Reducing Delamination when Drilling Composite Laminates 复合材料层合板钻孔时减少分层的后备机制研究进展

Journal of Research Updates in Polymer Science Pub Date : 2016-11-08 DOI: 10.6000/1929-5995.2016.05.03.2

C. Tsao, H. Hocheng

引用次数: 4

Use of Hydrophilic Monomers to Avoid Secondary Particle Nucleation in Miniemulsion Polymerizations of Methyl Methacrylate 在甲基丙烯酸甲酯微乳液聚合中使用亲水单体避免二次粒子成核

Journal of Research Updates in Polymer Science Pub Date : 2016-08-22 DOI: 10.6000/1929-5995.2016.05.02.2

A. Peixoto, I. Campos, H. Ferraz, J. C. Pinto

引用次数: 8

Microwaves Devulcanization of SBR Containing Carbon Black 含炭黑SBR的微波脱硫研究

Journal of Research Updates in Polymer Science Pub Date : 2016-08-22 DOI: 10.6000/1929-5995.2016.05.02.1

D. Hirayama, C. H. Scuracchio, C. Saron

{"title":"Microwaves Devulcanization of SBR Containing Carbon Black","authors":"D. Hirayama, C. H. Scuracchio, C. Saron","doi":"10.6000/1929-5995.2016.05.02.1","DOIUrl":"https://doi.org/10.6000/1929-5995.2016.05.02.1","url":null,"abstract":"Polymer recycling has been the most suitable alternative for management of plastics waste that are responsible by serious environmental damages. However, the recycling of some polymer materials, such as vulcanized elastomers, is not a trivial process. The recycling of elastomers is a process more complex than the recycling of thermoplastic polymers because the elastomers cannot be remolded by simple heating after vulcanization. Methods for rubber devulcanization has been developed as an interesting alternative for recover flow properties of elastomers, allowing other molding cycle. The aim of this work was to evaluate the effect of the presence of carbon black on devulcanization of styrene-butadiene rubber (SBR) by microwaves and analyze properties of recycled material. The devulcanization by microwaves showed efficiency for rubber compositions with higher content of carbon black incorporated as well as the properties of recycled material showed satisfactory performance for reuse in other products. Microwaves devulcanization of SBR is an important alternative for reuse of rubber waste and decrease of the environmental problem generated with discard of these materials.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75229539","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: 8

Novel Polycarbonates via Phosgenation of Unsaturated Diols 不饱和二醇光催化合成新型聚碳酸酯

Journal of Research Updates in Polymer Science Pub Date : 2016-08-22 DOI: 10.6000/1929-5995.2016.05.02.3

N. Al-muaikel

引用次数: 0