摘要
以聚丙烯(PP)为基体材料,采用熔融共混工艺制备不同含量的PP/有机改性蒙脱土(OMMT)复合材料,研究OMMT含量对PP复合材料结晶性能和冲击性能的影响。结果表明:加入OMMT能够有效提高PP复合材料的冲击强度,尤其是添加质量分数为2.5%的OMMT的PP复合材料的冲击强度较纯PP提升40%。加入OMMT能够促进PP的结晶温度、熔融温度向高温方向移动,而降低结晶度和半结晶时间,PP复合材料的结晶性能得到改善,有助于提高PP复合材料的冲击强度。同时,OMMT也使PP的晶体衍射峰向小角度迁移,说明OMMT插层到PP晶格中引发晶格发生畸变。OMMT能够提高PP复合材料的储能模量和损耗模量,同时造成PP复合材料的复数黏度下降。
Using polypropylene(PP)as the matrix material,PP/organically modified montmorillonite(OMMT)composites with different OMMT content were prepared by melt-blending process.The effect of OMMT content on the crystallization and impact properties of PP composites was investigated.The results show that the impact strength of PP composites can be effectively improved by adding OMMT,especially the impact strength of PP composites added with OMMT with mass fraction of 2.5%is 40%higher than that of pure PP.The crystallization temperature and melting temperature of PP can be promoted to move to high temperature,while the crystallinity and semicrystallization time of PP composites can be reduced.It shows that the improvement of crystallization properties of PP composites is helpful to improve the impact strength of PP composites.At the same time,OMMT also makes the diffraction peak of PP shift to a small angle,indicating that OMMT intercalation into PP lattice causes lattice distortion.OMMT can improve the storage modulus and loss modulus of PP composites,while causing the complex viscosity of PP composites to decrease.
作者
吴珊
曾婷婷
陈杏荷
WU Shan;ZENG Tingting;CHEN Xinghe(School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550018,China)
出处
《塑料科技》
北大核心
2025年第9期27-31,共5页
Plastics Science and Technology
基金
贵州省省级科技计划项目(黔科合基础ZK[2021]一般252)
贵州省普通高等学校青年科技人才成长项目(黔教合KY[2021]244)
2020年贵州师范学院博士基金项目(2020BS029)
贵州省高等学校先进功能电子材料重点实验室(黔教技[2023]021)。
关键词
聚丙烯
蒙脱土
结晶性能
冲击性能
Polypropylene
Montmorillonite
Crystallization properties
Impact properties
