摘要
以聚丙烯(PP)为基材,滑石粉和聚硅氧烷为添加剂,通过熔融共混制备滑石粉/聚硅氧烷/PP,研究了滑石粉/聚硅氧烷和不同比例滑石粉对PP物理力学性能和耐刮擦性能的影响。结果表明:与纯PP相比,添加滑石粉的试样弯曲和冲击强度都得到提高,拉伸强度均有所下降。添加聚硅氧烷对PP的冲击强度和断裂伸长率有一定的改善,拉伸强度略下降。经滑石粉改性后PP的结晶形态和形貌均被破坏,而聚硅氧烷不影响PP的结晶;添加滑石粉和聚硅氧烷会改善PP的结晶性能,在其基体中仍存在完整的球晶结构,结晶峰面积也明显减小,有利于晶体形成。对于添加滑石粉/聚硅氧烷的PP,一方面滑石粉增加PP的硬度从而改善PP的耐刮擦性能,另一方面聚硅氧烷在PP中既充当相容剂使得PP与滑石粉相容性好,又包覆在滑石粉表面充当耐刮擦剂降低材料表面的摩擦系数,从而两者协同进一步提高了PP的耐刮擦性能。
Using polypropylene(PP)as the substrate,talc and polysiloxane as additives,talc/polysiloxane/PP was prepared by melt blending.The effects of talc/polysiloxane and talc of different proportions on the PP physical and mechanical properties and scratch resistance were studied.The results showed that compared with pure PP,the bending strength and impact strength of the samples with talc powder were improved,while the tensile strength was reduced.The addition of polysiloxane led to certain improvements in PP’s bending strength,impact strength and elongation at break,and the tensile strength decreased slightly.The crystal morphology and morphology of PP modified by talc were destroyed,and polysiloxane did not affect the crystallization of PP.However,the addition of talc and polysiloxane would improve the crystallization performance of PP.There was a complete spherulite structure in its matrix,and the crystalline peak area was also significantly reduced,which was conducive to crystal formation.By adding talc powder and polysiloxane PP at the same time,on one hand,talc powder increased the hardness of PP to improve the scratch resistance of PP,on the other hand,polysiloxane acted as a compatibilizer in PP,resulting in the good compatibility of PP and talc powder by coating on the surface of talc powder to act as a scratch-resistant agent to reduce the friction coefficient of the material surface,so that the two cooperated to further improve the scratch resistance of PP.
作者
罗林园
冯建湘
刘跃军
陈艺锋
雷鑫
彭思梅
毛龙
LUO Linyuan;FENG Jianxiang;LIU Yuejun;CHEN Yifeng;LEI Xin;PENG Simei;MAO Long(Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou Hunan 412007,China;Key Laboratory of Polymer Processing Principles and Application of Xiamen City,Xiamen University of Technology,Xiamen Fujian 361024,China)
出处
《包装学报》
2020年第2期30-38,共9页
Packaging Journal
基金
国家自然科学基金资助项目(11872179,51805524)
福建省科技计划基金资助项目(2018H6024)
湖南省自然科学基金资助项目(2018JJ4072)
石化新材料与资源精细利用国家地方联合工程实验室开放基金资助项目(KF201806)。
关键词
滑石粉
聚硅氧烷
聚丙烯
抗划伤
talc
polysiloxane
polypropylene
scratch resistance
