【作者】 杨乐； 张纯； 罗筑； 龚维； 何力；

【Author】 LE Yang;CHUN Zhang;ZHU Luo;WEI Gong;LI He;College of Materials & Metallurgy,Guizhou University;National Engineering Research Center for Compounding and Modification of Polymer materials;

【机构】 贵州大学材料与冶金学院； 国家复合改性聚合物材料工程技术研究中心；

【摘要】 以转矩流变仪为反应器制备了长支链聚丙烯,研究了不同引发剂及接枝单体TMPTA用量对PP熔融支化反应的影响,考察了PP样品的流变特性。结果表明,半衰期不同的引发剂对PP熔融支化反应的影响不同,改变TMPTA的含量能使反应的机理随之变化。改性PP与纯PP的流变性能存在显著差异,集中表现为低频储能模量升高,损耗角减小以及松弛时间变长等。更多还原

【Abstract】 A research on the impact factors,including initiators’ categories and the grafting monomerTMPTA’s dosages,of molten polypropylene(PP)’s branching reaction was implemented in a torque rheometer.The modified polypropylene was fabricated,and its rheology properties were investigated.The results indicated that initiators with different half-lives made diverse influences on the branching reaction of PP.The alteration of TMPTA’s dosagecan change the reaction mechanism.The difference of rheology properties of modified PP and pure PP is obvious,such as higher low-frequency storage modulus,smaller loss angle and longer relaxation time.更多还原