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.
作者
娄立娟
王艳芳
张丽洋
杜斌
陈商涛
姜凯
俞炜
黄强
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)
出处
《合成树脂及塑料》
CAS
北大核心
2017年第3期80-84,共5页
China Synthetic Resin and Plastics
关键词
高流动抗冲共聚聚丙烯
相结构
流变学
相分离
high flow impact polypropylene
phase structure
rheology
phase separatio
