稀土β成核剂改性PPR力学与结晶性能研究  

Study on Mechanical Properties and Crystallization of PPR Modified by Rare Earth β Nucleating Agent

作　　者：丁会利[1] 张梅[1] 聂鑫[1] 张洁[1] 郑德 

机构地区：[1]河北工业大学化工学院高分子科学研究所,天津300130 [2]广东炜林纳功能材料有限公司,广东佛山528521

出　　处：《塑料科技》2011年第4期103-106,共4页Plastics Science and Technology

基　　金：河北省自然科学基金资助项目(E2010000122)

摘　　要：研究了稀土β成核(剂WBG-1改)性无规共聚聚丙烯(PPR的)力学行为,并利用热台偏光显微镜和广角X射线衍射观察和分析了WBG-1改性PPR的晶型和结晶形态。结果表明:随着WBG-1用量的增加,PPR的拉伸强度、弯曲强度和弯曲模量呈现先降后升趋势,而其冲击强度和断裂伸长率呈现先升后降的趋势,且在WBG-1用量为0.3%时均达到最大值;添加WBG-1后改,性PPR的β晶含量和结晶速度明显提高。The mechanical properties and crystallization of propylene-ethylene random copolymer （PPR） modified by rare earth β nucleating agent （WBG-1） were studied through SEM, WAXD and PLM. The results show that： with increasing of WBG-1, the tensile strength, bending strength and modulus of modified PPR decrease firstly and then increase, but the impact strength and elongation at break increase firstly and then decrease; and when the nucleating agent content is 0.3%, the properties reach to the peak value. β-crystal form contents and the rate of crystallization of modified PPR mixing WBG-1 are significantly increased .

关 键 词：无规共聚聚丙烯 稀土Β成核剂 Β晶型 力学性能 结晶 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]