中国塑料 ›› 2007, Vol. 21 ›› Issue (3): 30-34.

• 材料与性能 • 上一篇    下一篇

相对分子质量及其分布对成核聚丙烯性能的影响

张敏敏1,2,鲁圣1,2,何敏1,2,张天水2,3,于杰1,2*,陈兴江2   

  1. 1.贵州大学材料科学与冶金工程学院,贵州贵阳550003;
    2.国家复合改性聚合物材料工程技术研究中心,贵州贵阳,550014;
    3.华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海200237
  • 出版日期:2007-03-26 发布日期:2021-04-06

Effect of Molecular Weight and Its Distribution on Properties of Nucleating Polypropylene

ZHANG MIN-min1,2,LU SHENG1,2,HE MIN1,2,ZHANG TIAN-shui2,3,YU JIE1,2*,CHEN XING-jiang2   

  1. 1.School of Materials Science and Metallurgical Engineering, Guizhou University, Guiyang 550003,China;
    2. National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, China;
    3.Key Laboratory for Ultrafine Materials of Ministry of Education,East China University of Science and Technology,School of Materials Science and Engineering,Shanghai 200237, China
  • Online:2007-03-26 Published:2021-04-06

摘要: 通过加人过氧化二异丙苯(DCP)来改变聚丙烯(PP)的相对分子质量及其分布,研究了成核PP相对分子质量及其分布对其性能的影响。结果表明:加人DCI〕后,成核PP的相对分子质量降低、分布变窄,促使PP结晶速度进一步提高,晶体尺寸进一步减小,成核PP中的俘晶型消失。当成核剂TM-3和降解剂DCI〕的含量分别为0.4%和0.05%时,成核PP的透明性最好。随成核PP的相对分子质量降低、分布变窄,成核PP的力学性能略微下降。

关键词: 相对分子质量, 相对分子质量分布, 聚丙烯, 成核, 性能

Abstract: The effect of molecular weight and molecular weight distribution( MWD) on the properties of polypropylene(PP)was studied by addition of DCP. The reaction of DCP resulted in lower molecular weight and narrower MWD of PP, and the crystallization rate increased, the spherulite size decreased and β phase vanished, which improved the transparency. When the content of the nucleating agent(TM-3)and theDCP were 0.4%and 0.05%,respectively, the best transparency of PP was ob- served. However, the mechanical properties of PP decreased slightly with reduced molecular weight and narrowed MWD.

Key words: molecular weight, molecular weight distribution, polypropylene, nucleation;property

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