高流动抗冲共聚聚丙烯相结构的流变学  

Rheological study about phase structure of high flow impact PP

作　　者：娄立娟[1] 王艳芳[1] 张丽洋[1] 杜斌[1] 陈商涛[1] 姜凯[1] 俞炜[2] 黄强[1] Lou Lijuan;Wang Yanfang;Zhang Liyang;Du Bin;Chen Shangtao;Jiang Kai;Yu Wei;Huang Qiang(Petrochemical Research Institute,PetroChina Company Limited,Beijing 102206,China;Shanghai Jiao Tong University,Shanghai,200240,China)

机构地区：[1]中国石油天然气股份有限公司石油化工研究院,北京市102206 [2]上海交通大学,上海市200240

出　　处：《合成树脂及塑料》2017年第3期80-84,共5页China Synthetic Resin and Plastics

摘　　要：将核磁序列分析法、傅里叶变换红外光谱法与聚合物流变学方法相结合,研究了典型的高流动抗冲共聚聚丙烯的相结构。结果表明:高流动抗冲共聚聚丙烯K9928和K7726H的乙烯-丙烯无规共聚物的结构非常接近;乙烯总含量不同导致乙烯-丙烯无规共聚物含量的差异,以及乙烯-丙烯嵌段共聚物含量和结构的差异;K9928和K7726H属于具有低共熔温度的共聚物,利用时温叠加原理流变学黏弹性评价方法可知,K9928的相分离温度较K7726H低,相同温度下,K9928较K7726H的相分离现象显著。The phase structures of high flow impact polypropylene(PP),K9928and K7726H,wereinvestigated by polymer rheology coupled with nuclear magnetic resonance(NMR)analysis and Frontier transforminfrared spectrum(FTIR).The results indicate that the random ethylene-propylene copolymer(EPR)in K9928and K7726H have similar structure.Different total ethylene contents lead to the different contents of EPR andvarious content and structure of ethylene/propylene block copolymer in two samples.Both K9928and K7726Hfeature low eutetic temperature,however,rheology viscoelastic properties evaluation based on time-temperaturesuperposition has shown that the phase separation temperature of K9928is lower than that of K7726H,whichinduces more phase separation in K9928than that in K7726H at same temperature.

关 键 词：高流动抗冲共聚聚丙烯 相结构 流变学 相分离 

分 类 号：O632.12[理学—高分子化学]