复合暖通交联聚乙烯复合材料的制备及性能分析
Preparation and Performance Analysis of Composite HVAC Crosslinked Polyethylene Composites
赖莉琼 1刘超婧 1黄国祥2
作者信息
- 1. 闽北职业技术学院,福建 南平 353000
- 2. 福建省南平市建筑设计研究院,福建 南平 353000
- 折叠
摘要
为提高交联聚乙烯(PEX)的力学性能和热稳定性,以聚乙烯为基体,以硅烷偶联剂(乙烯基三甲氧基硅烷)改性后的蒙脱土为填料,复配制备改性蒙脱土/PEX复合材料,研究不同改性蒙脱土掺量对PEX复合材料力学及热性能的影响.结果表明:掺入质量分数1.0%的改性蒙脱土有效提升了PEX复合材料的拉伸强度、弯曲强度及简支梁冲击强度,提升了PEX复合材料的热稳定性.在此掺量条件下,PEX复合材料的拉伸强度、弯曲强度及简支梁冲击强度分别为16.21 MPa、21.96 MPa和10.31 kJ/m2,电场击穿强度达到最高,为32.21 kV/mm,维卡软化温度为120.91℃.因此,适量掺入改性蒙脱土能够有效改善PEX复合材料的力学性能和热稳定性.
Abstract
In order to improve the mechanical properties and thermal stability of crosslinked polyethylene(PEX),modified montmorillonite/PEX composites were prepared using polyethylene as matrix and silane coupling agent(vinyltrimethoxysilane)modified montmorillonite as filler,and the effect of different modified montmorillonite dosages on the mechanical and thermal properties of the PEX composites were investigated.The results showed that the moderate doping of 1.0%mass fraction modified montmorillonite effectively enhanced the tensile strength,flexural strength and simple beam impact strength of PEX composites,and improved the thermal stability of PEX composites.Under this doping condition,the tensile strength,flexural strength and simply supported beam impact strength of PEX composites were 16.21 MPa,21.96 MPa and 10.31 kJ/m2,respectively,the electric field breakdown strength reached the maximum of 32.21 kV/mm,and the Vicat softening temperature was 120.91℃.Therefore,the appropriate amount of modified montmorillonite can effectively improve the mechanical properties and thermal stability of PEX composites.
关键词
交联聚乙烯/蒙脱土/偶联剂Key words
Crosslinked polyethylene/Montmorillonite/Coupling agent引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据