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| 1 | 动态硫化NR/LDPE热塑性弹性体的制备及性能研究显示文摘以天然橡胶(NR)和低密度聚乙烯(LDPE)为基本材料,采用动态和静态硫化法在开炼机上分别制备了NR/LDPE共混物。通过万能材料试验机、扫描电镜及差示扫描量热仪对比研究了动态硫化和静态硫化NR/LDPE共混物的力学性能、相态分布和结晶情况等,并探究了硫磺用量、橡塑比和不同混合工艺对动态硫化NR/LDPE热塑性弹性体性能的影响。结果表明,对于动态硫化NR/LDPE热塑性弹性体,当共混体系中硫磺的质量分数为2.5%时,热塑性弹性体的力学性能和重复加工性能较好;当橡塑比为50/50时,热塑性弹性体的综合性能较佳。并且,母胶法制备的热塑性弹性体较橡塑预混法的力学性能更优异。 | 赵军钗 王彬 李凯华 | 2016 | 石家庄铁道大学学报(自然科学版)2016，29，3： | 0 |
| 2 | The Relationship between Pendant Phosphate Groups and Mechanical Properties of Polyisoprene Rubber显示文摘It is still a great challenge to mimic the structure and function of natural rubber by introducing polar components into synthetic polyisoprene.In order to explore the function of phosphate groups on the mechanical properties of polyisoprene rubber,a terminally functionalized compound(PIP-P)containing phosphate groups was synthesized and further vulcanized to prepare the model compound V-PIP-P.Through analyzing the test results,it was found that these phosphate groups formed polar aggregates in non-polar polyisoprene rubber matrix,serving as an additional dynamic cross-linking sites,which increases the cross-linking density and improves mechanical properties.The influence of the phosphate groups on the strain-induced crystallization(SIC)was further investigated via synchrotron wide-angle X-ray diffraction(WAXD)experiment.These phosphate group aggregates not only reduced the onset strain of SIC,but also slowed down the molecular chain mobility,which hinder the crystal lateral growth.The above results help us to gain a deeper understanding for the function of phosphate groups in the formation of'naturally occurring network'and guide the molecular design of next generation polyisoprene rubber. | Shi-Qi Li Mao-Zhu Tang Cheng Huang Rong Zhang Guang-Su Huang Yun-Xiang Xu | 2021 | Chinese Journal of Polymer Science2021，39，4： | 0 |
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