【摘 要】
：
To improve creep resistance of directional polytetrafluoroethylene (PTFE) films, epoxy grafted nano-SiO2 is mixed with PTFE powder before sintering and calender
【机 构】
：
Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,DSAPM Lab,S
【出 处】
：
Chinese Journal of Polymer Science
论文部分内容阅读
To improve creep resistance of directional polytetrafluoroethylene (PTFE) films, epoxy grafted nano-SiO2 is mixed with PTFE powder before sintering and calender rolling. The aligned macromolecular chains (especially those in amorphous region) of the composite films can be bundled up by the nanoparticles to share the applied stress together. In addition, incorporation of silica nanoparticles increases crystallinity of PTFE and favors microfibrillation of PTFE in the course of large deformation. As result, PTFE films exhibit lower creep strain and creep rate, and higher tensile strength and hardness. The work is believed to open an avenue for manufacturing high performance fluoropolymers by nano-inclusions.
The improved macromolecular chains (particularly those in amorphous regions) of the composite films can be bundled up by the nanoparticles To addition, incorporation of silica nanoparticles increase crystallinity of PTFE and favors microfibrillation of PTFE in the course of large deformation. As result, PTFE films exhibit lower creep strain and creep rate, and higher tensile strength and hardness. The work is believed to open an avenue for manufacturing high performance fluoropolymers by nano-inclusions.
其他文献
北运河是海河北系的一条重要河流,发源于北京市境内的燕山南麓,自西北向东南流经昌平、顺义、朝阳、通州4个区,出境经河北至天津入海河。干流在北京市境内长89.4 km,流域面积
Numbers of hydrate-based new techniques require the algorithm to be able to perform multiphase flash calculation where one phase is a gas hydrate phase.Tetrahyd
2月26日,天津市鑫卫化工有限责任公司获批登记国内企业第1个烯丙苯噻唑制剂产品——8%颗粒剂,登记作物和防治对象为水稻稻瘟病。此前,只有1家国外企业在我国登记有烯丙苯噻唑
请下载后查看，本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
9月15日,随着空气压缩机隆隆的轰鸣声戛然而止,辽河油田曙光采油厂为期8天的稠油注空气辅助蒸汽吞吐开采技术区块同注宣告成功。“与以往在单井上成功实施
September 15, wi
粘连是引起术后病率的主要原因.50%的妇科手术后形成新的粘连[1],严重的术后粘连可以引起肠梗阻、不育和疼痛.因此,人们越来越认识到粘连及预防粘连的重要性,于是一门新兴的亚学科--腹膜外科学在近20余年的时间里迅速发展起来.腹膜外科学主要是研究腹膜的愈合及修复、粘连的形成机制及粘连预防措施的学科,广义的腹膜外科学还包括腹膜肿瘤的临床及基础研究.这一学科的发展及应用,将会进一步推动外科手术学的进步,
目的 :探讨促使卵泡发育的经济有效的方法。方法 :选择在我中心就诊查因后诊断为排卵障碍的不孕症患者 180人 ,随机分为 3组 :A组于月经来潮第 5天口服克罗米酚 (CC) 5 0mg/d
目的 探讨重症神经精神性狼疮 (NPLE)急性期影响预后的因素。方法 1991—1999年在中山医科大学附属第一医院住院的重症NPLE 136例。运用回顾性队列研究策略 ,以病人入院日
为加强和提高生殖医学领域临床医生对男女不孕、不育症的认识和临床、实验室诊疗水平,从2002年起编辑部组织举办了数次全国男女不孕不育诊疗研习班,学员们都获益非浅。但还有
目的建立中国5~14岁儿童呼气峰值流速(PEFR)正常值范围和预测值方程式。方法根据中国地理分布选取5个研究中心:华南(广州)、华东(苏州)、西南(成都)、西北(西安)、华北(北京)