注射工艺对稀土β成核剂改性PP力学性能影响  

Influence of Injection Processing Condition on Mechanics Properties of Polypropylene Modified by Rare EarthβNucleating Agent

作　　者：李雪峰[1] 郭绍辉[1] 冯嘉春[2] 郑德 钱玉英 

机构地区：[1]中国石油大学(北京)化学科学与工程学院,北京102249 [2]复旦大学高分子科学系,上海200433 [3]广东炜林纳功能材料有限公司,广东佛山528521

出　　处：《现代塑料加工应用》2008年第1期11-15,共5页Modern Plastics Processing and Applications

基　　金：国家自然科学基金资助(50673021);上海市自然科学基金(06ZR14007)

摘　　要：考察了工艺参数对稀土β成核剂改性聚丙烯(β-PP)力学性能的影响。当注射速率在20～80 mm/s变动时,β-PP冲击强度的最大值与最小值相比提高了12.2%,熔体温度在190～250℃、保压压力在20～50 MPa和保压时间在2～60s变动时,冲击强度相对应的提高幅度分别为22.2%,31.8%和97.7%;同时对比了不同工艺条件对α-PP(未添加β成核剂聚丙烯)和β-PP冲击性能影响的差异。结果表明,β-PP对注射工艺条件的变化更敏感。The influence of injection processing parameters on the mechanical properties of polypropylene modified by a rare earth β nucleating agent was investigated. Within the range of injection speed varied from 20 mm/s to 80 mm/s, the increment between the maximum and minimum of impact strength is 12.2% ,while that value of increased range of impact strength corresponding to melting temperature changing from 190 ℃ to 250 ℃, holding pressure from 20 MPa to 50 MPa and holding time from 2 s to 60 s are 22.2%, 31.8%and 97.7 % respectively. The effects of the injection condition on the impact strength of α-PP and β-PP system were comparatively studied. The results show that β-PP modified by rare earth nucleating agent is more sensitive to the change of injection process condition than α-PP.

关 键 词：聚丙烯 注射工艺 稀土Β成核剂 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] U465.41[一般工业技术—材料科学与工程]