振动外场和β成核剂用量对等规聚丙烯β晶含量和力学性能的影响  

Effects of Vibration Field and β-Nucleating Agent Contents on β-Crystal Contents and Mechanical Properties of iPP

作　　者：吴萍萍[1] 李晓光[1] 杨其[1] 黄亚江[1] 孔米秋 廖霞[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065 [2]四川大学空天科学与工程学院,四川成都610065

出　　处：《塑料科技》2017年第10期55-60,共6页Plastics Science and Technology

基　　金：高等学校学科创新引智计划(教育部基金)

摘　　要：利用自制装置研究了不同温度下机械振动外场和β成核剂TMB-5用量对等规聚丙烯(iPP)β晶相含量和力学性能的影响。结果表明:当TMB-5用量为0.1%时,iPP的β晶相对含量达到最大值;150℃(固态)下施加振动会提高β晶的相对含量,而在190℃(熔融态)下施加振动则会减少β晶的相对含量;150℃下施加振动外场可使得试样断裂伸长率增大、拉伸强度下降,而190℃下则使试样的拉伸强度提高、断裂伸长率减小。A self-designed apparatus was used to investigate the effects of mechanical vibration field and the β-form nucleating agent（TMB-5） contents on the β-crystal contents and mechanical properties of isotactic polypropylene（iPP） at different processing temperature. The results indicate that： β-iPP content reaches the highest when β-form nucleating agent content is 0.1%. And vibration field can increase the relative contents of β-i PP processed at 150℃（solid state） and decrease the relative contents of β-i PP if samples prepared at 190℃（melt state）. Eventually, the mechanical properties of samples processed under different conditions become diverse from each other, sacrificing strength for toughness at 150℃ but the other way around at 190℃.

关 键 词：聚丙烯 振动 Β成核剂 固态加工 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]