摘要
利用溶液插层法制备了膨胀石墨/硅橡胶(EG/VMQ)导热复合材料,对比普通熔融共混法研究了EG/VMQ的热稳定性。将碳纤维(CF)、SiC、BN、Al2O3等作为第三组分加入到EG/VMQ体系中,考察了第三组分对复合材料热稳定性和热空气老化性能的影响。结果表明,溶液插层法(最大质量损失速率对应温度Tmax为555.8℃)在改善EG/VMQ复合材料热稳定性方面优于普通熔融共混法(Tmax为527℃);第三组分CF在提高溶液插层法EG/VMQ复合材料的热稳定性(Tmax为561℃)和热空气老化性能方面均优于其它填料。
Solution intercalation was used to prepare the EG/VMQ thermally conductive compo-sites.In contrast with the conventional compo-sites prepared by melt mixing,the thermal stability of the composites was studied.The third component（such as CF,SiC,BN and Al2O3 et al.） was added into solution intercalation prepared EG/VMQ systems to study the thermal stability and hot air aging performance.It was found that solution intercalation prepared VMQ/EG（Tmax,555.8 ℃） showed higer thermal stability than melt mixing method（Tmax,527 ℃）.And CF furtherly improved the thermal stability（Tmax,561 ℃） and hot air aging performance of solution intercalation prepared VMQ/EG composites.
出处
《弹性体》
CAS
北大核心
2011年第3期6-9,30,共5页
China Elastomerics
基金
山东省自然科学基金项目(2009ZRB02340)
关键词
硅橡胶
热导率
膨胀石墨
碳纤维
热空气老化
silicone rubber
themal conductivity
expanded graphite（EG）
carbon fiber（CF）
hot air aging
