Journal of Elastomers and Plastics最新文献_第7页

Synthesis and Investigation of Glycolysates and Obtained Polyurethane Elastomers 糖酵解物及所得聚氨酯弹性体的合成与研究

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-03-01 DOI: 10.1177/0095244309354368

J. Datta

{"title":"Synthesis and Investigation of Glycolysates and Obtained Polyurethane Elastomers","authors":"J. Datta","doi":"10.1177/0095244309354368","DOIUrl":"https://doi.org/10.1177/0095244309354368","url":null,"abstract":"The polyurethane (PU) intermediates were obtained by glycolysis of waste PU foam in the reaction with 1,6-hexamethylene glycol (HDO). The effects of different weight ratios of HDO to PUR foam on selected physicochemical properties were also determined. The polyurethanes were synthesized from the obtained intermediates by a two-step method using diisocyanate and a glycolysis product in the molecular mass range 700—1000. Hexamethylene glycol, 1,4-butylene, and ethylene glycol were used as chain extenders. The influence of the NCO group concentration in prepolymer on the glass transition temperature (Tg) and storage modulus of PU elastomers were investigated by the DMTA method. Thermal decomposition of the obtained glycolysates and polyurethanes was investigated by thermogravimetry coupled with Fourier transform infrared spectroscopy (FTIR). Tensile strength and elongation at break of polyurethanes were determined using Zwick universal tensile tester. FTIR spectra showed that main decomposition occurs at about 400°C in both glycolysates and PU elastomers. The main products of thermal decomposition are carbon monoxide, carbon dioxide, compounds containing ether and hydroxyl groups, and probably acetaldehyde. The synthesized PU’s had tensile strength in the range 13.4—15.6 MPa and elongation at break in the range 59.3—122.9%.","PeriodicalId":15644,"journal":{"name":"Journal of Elastomers and Plastics","volume":"10 1","pages":"117 - 127"},"PeriodicalIF":1.7,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76897428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 57

Properties of Natural Rubber Filled with Ultra Fine Acrylate Rubber Powder 超细丙烯酸酯胶粉填充天然橡胶的性能研究

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-03-01 DOI: 10.1177/0095244310362733

P. Sae-oui, C. Sirisinha, K. Hatthapanit

{"title":"Properties of Natural Rubber Filled with Ultra Fine Acrylate Rubber Powder","authors":"P. Sae-oui, C. Sirisinha, K. Hatthapanit","doi":"10.1177/0095244310362733","DOIUrl":"https://doi.org/10.1177/0095244310362733","url":null,"abstract":"Properties of natural rubber (NR) filled with various loadings of ultra-fine vulcanized acrylate rubber powder (ACMP) were investigated. ACMP loading was varied from 0 to 20 phr and, after compounding, the compound properties were determined. Results reveal that increasing ACMP loading leads to improved processability, as evidenced by the reduction of both mixing energy and Mooney viscosity. ACMP, however, has negative effect on cure, that is, both scorch time and optimum cure time are prolonged while the state of cure is reduced with increasing ACMP loading. Due to the reinforcing effect of the fine ACMP particles, both modulus and hardness are found to increase consecutively with increasing ACMP loading. The tensile strength is also found to improve with increasing ACMP loading up to 10 phr. However, due to the cure retardation effect and the high thermoplastic nature, the presence of ACMP causes deterioration of elasticity. As ACMP is highly polar and fully saturated, the addition of ACMP enhances the resistance to oil and thermal aging of the NR vulcanizate. Significant improvement of thermal aging resistance is found when 10 phr or more of ACMP is added.","PeriodicalId":15644,"journal":{"name":"Journal of Elastomers and Plastics","volume":"78 1","pages":"139 - 150"},"PeriodicalIF":1.7,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89150647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Essential Work of Fracture Evaluation of Compression-Molded Polypropylene/Ethylene and 1-Octene Copolymer Blends 压缩成型聚丙烯/乙烯共聚物及1-辛烯共聚物共混物断裂评价的基础性工作

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-03-01 DOI: 10.1177/0095244309354369

Lei Wang, Bang-hu Xie, Wei Yang, Yue-Xin Shen, Ming‐bo Yang

引用次数: 3

Effects of Interphase and Short Fiber on Puncture and Burst Properties of Short-fiber Reinforced Chloroprene Rubber 间相和短纤维对短纤维增强氯丁橡胶穿刺爆裂性能的影响

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-03-01 DOI: 10.1177/0095244310362397

S. Ryu, D. Lee

引用次数: 7

Mechanical, Thermal, and Morphological Properties of Polylactic Acid/Linear Low Density Polyethylene Blends 聚乳酸/线性低密度聚乙烯共混物的力学、热学和形态学特性

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-02-24 DOI: 10.1177/0095244310362403

Harintharavimal Balakrishnan, Azman Hassan, M. U. Wahit

{"title":"Mechanical, Thermal, and Morphological Properties of Polylactic Acid/Linear Low Density Polyethylene Blends","authors":"Harintharavimal Balakrishnan, Azman Hassan, M. U. Wahit","doi":"10.1177/0095244310362403","DOIUrl":"https://doi.org/10.1177/0095244310362403","url":null,"abstract":"Melt blending of polylactic acid (PLA) and linear low density polyethylene (LLDPE) was performed to investigate the effects of LLDPE loadings on the morphology, mechanical and thermal properties of PLA/LLDPE blends. LLDPE was blended with PLA from 5—15 wt% and prepared by counterrotating twin-screw extruder followed by injection molding into test samples. The mechanical properties of the blends were assessed through tensile, flexural and impact testings while thermal properties were analyzed using differential scanning calorimetry (DSC) and thermogravimetric analysis. Scanning electron microscope was used to study the dispersion and particle size of LLDPE in PLA matrix. The impact strength of PLA improved by 53% with addition of 10 wt% LLDPE. However, the tensile modulus and strength, and elongation at break of PLA/LLDPE blends decreased with increasing weight ratio of LLDPE. Similarly, flexural modulus and strength also dropped with addition of LLDPE. DSC results showed that glass transition temperature (Tg) and crystallinity (X c) of PLA increased with blending of LLDPE. The LLDPE particles size was seen to increase with increasing loadings of LLDPE which explains the unexpected decrease of impact strength after 10 wt%.","PeriodicalId":15644,"journal":{"name":"Journal of Elastomers and Plastics","volume":"35 1","pages":"223 - 239"},"PeriodicalIF":1.7,"publicationDate":"2010-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81955819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 64

Influence of Hard Segment Structure on Degradation of Cross-linked Poly(ether urethanes) Elastomers 硬段结构对交联聚醚聚氨酯弹性体降解的影响

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-02-03 DOI: 10.1177/0095244310362732

S. Oprea

引用次数: 9

Thanks to Reviewers 感谢审稿人

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-01-01 DOI: 10.1177/0095244309359363

引用次数: 0

Characteristics of Acrylic Rubber Composites with Mica and Carbon Black 云母与炭黑复合材料的性能研究

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-01-01 DOI: 10.1177/0095244309349476

R. M. Fernandes, L. Visconte, R. Nunes

引用次数: 14

Surface Graft Modification of Styrene—Butadiene—Styrene Triblock Copolymer Membrane by Ultraviolet Irradiation 紫外辐照对苯乙烯-丁二烯-苯乙烯三嵌段共聚物膜表面接枝改性的研究

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-01-01 DOI: 10.1177/0095244309349473

Wen-Fu Lee, Heng-Hsien Lee

{"title":"Surface Graft Modification of Styrene—Butadiene—Styrene Triblock Copolymer Membrane by Ultraviolet Irradiation","authors":"Wen-Fu Lee, Heng-Hsien Lee","doi":"10.1177/0095244309349473","DOIUrl":"https://doi.org/10.1177/0095244309349473","url":null,"abstract":"To improve the wettability or hydrophilicity of the styrene— butadiene—styrene (SBS) triblock copolymer membrane using as transdermal patches, a series of graft copolymers were prepared by grafting hydrophilic monomers onto SBS membrane through ultraviolet irradiation technique. The characterization of the grafted membranes and the influence of various grafting factors on grafting percentage were studied. Infrared and X-ray photoelectron spectroscopy techniques were used to elucidate the surface properties of the grafted membrane. Scanning electron microscopy was used to observe the surface morphology of the grafted membrane. Experimental results showed that the grafting percentage and extent of grafting per area (mg/ cm2) were about linearly increased with an increase of the molar ratio of hydrophilic monomer. In addition, the grafting percentage and extent of grafting per area for the grafted membranes were also approximately linearly increased with increase in irradiation time until 40 min. Decreasing contact angle and increasing equilibrium water content confirmed that the wettability of modified SBS membrane was improved.","PeriodicalId":15644,"journal":{"name":"Journal of Elastomers and Plastics","volume":"72 1","pages":"49 - 64"},"PeriodicalIF":1.7,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90479430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Influence of Reaction Volume on the Properties of Natural Rubber-g-Methyl Methacrylate 反应体积对天然橡胶-甲基丙烯酸甲酯性能的影响

IF 1.7 4区材料科学

Journal of Elastomers and Plastics Pub Date : 2010-01-01 DOI: 10.1177/0095244309345410

E. Kalkornsurapranee, K. Sahakaro, Azizon Kaesaman, C. Nakason

引用次数: 10