摘要
采用片状六方氮化硼(h-BN)与碳化硅晶须(SiCw)复配填料填充聚砜制备导热绝缘聚砜复合材料。选用熔融混合、辊炼混合和粉末混合3种不同的复合方式研究复合方式对聚砜复合材料导热绝缘性能的影响;选用模压成型和注塑成型研究成型方式对聚砜复合材料导热绝缘性能的影响。采用扫描电子显微镜、导热分析仪、超高电阻微电流测量仪对复合材料的断面微观形貌、导热性能、电绝缘性能进行了表征。结果表明,粉末混合对复合材料导热性能的提高效果明显优于熔融混合和辊炼混合,模压成型要优于注塑成型。由于热传导机制和电导机制的不同,制备方法对电绝缘性能的影响规律与对导热性能的影响规律相反。
A new kind of thermally conductive and electrically insulating composite were obtained by mixing hexagonal boron nitride flakes(h-BN),silicon carbide whiskers(Si Cw) with polysulfone.The mixing methods included melt mixing method,roll-milled mixing method and powder mixing method,and polysulfone composites were molded by hot press molding and injection molding.The effects of mixing method and molding method on the thermal conductivity and insulating property of polysulfone composites were studied.Morphology,thermally conductive property and electrically insulating property were characterized by scanning electron microscopy(SEM),thermal conductivity analysis instrument and high resistance micro-current tester.The results indicate that the powder mixing could improve the thermal conductivity of polysulfone composites more effectively than the melt mixing and the roll-milled mixing,and the hot press molding is superior to the injection molding.Due to the difference between the thermal conduction mechanism and electrical conduction mechanism,the influence of preparation method on the insulating property of polysulfone composites is contrary to that on the thermal conductivity.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第3期153-157,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金委员会-中国工程物理研究院联合基金资助项目(11176025)
四川省教育厅重大培育项目(14CZ0011)
四川省非金属复合与功能材料省部共建国家重点实验室培育基地开放基金项目(11zxfk01
12zxfk05)
关键词
聚砜
复合材料
制备
导热性能
电绝缘性能
polysulfone
composite
preparation
thermal conduction
electrically insulation
