摘要
以聚乙二醇(PEG)为插层剂,通过机械球磨法制备了PEG插层剥离改性氮化硼。以低密度聚乙烯(LDPE)为基体,PEG插层剥离改性氮化硼为导热填料,采用双辊开炼、压片成型制备LDPE/PEG插层剥离改性氮化硼导热复合材料,研究了改性氮化硼用量及粒径对复合材料导热性能、力学性能和电绝缘性能的影响。结果表明:随着PEG插层剥离改性氮化硼用量的增加,复合材料的导热性能提高,拉伸强度和弯曲强度提高,悬臂梁缺口冲击强度下降;粒径较大的PEG插层剥离改性氮化硼对复合材料导热性能的提高更显著;复合材料的表面电阻下降,但仍保持在1010数量级,具有优异的电绝缘性能。
Polyethylene glycol(PEG)was added to prepare PEG-intercalated boron nitride(BN)via mechanical ball grinding which was added into low density polyethylene(LDPE)as thermal conductive filler to obtain LDPE/PEG intercalated BN thermal conductive composites via two-roller,open-mill and compressing molding.The effects of the amount and particle size of the modified BN on the thermal conductivity,mechanical properties and electrical insulation of the composites were observed.The results show that the thermal conductivity,tensile strength and bending strength of the composites are improved with the increasing amount of PEG-intercalated BN,while whose Notched Izod impact strength falls.The PEG-intercalated BN with larger particle size can improve the thermal conductivity of the polymer more effectively.The composite materials perform excellently in electrical insulation at 10^(10)Ω although whose surface resistance drops.
作者
杨菁菁
向萌
缪鑫凯
周仕龙
Yang Jingjing;Xiang Meng;Miu Xinkai;Zhou Shilong(School of Materials Engineering,Jiangsu University of Technology,Changzhou 213001,China)
出处
《合成树脂及塑料》
CAS
北大核心
2021年第2期15-19,共5页
China Synthetic Resin and Plastics
基金
国家自然科学基金(21908086)
江苏省高校自然科学面上项目(19KJB610011)。
关键词
低密度聚乙烯
六方氮化硼
聚乙二醇
导热系数
low density polyethylene
hexagonal boron nitride
polyethylene glycol
thermal conductivity
