摘要
采用原位聚合法制备了环氧树脂/纳米S iO2灌封材料。用透射电镜(TEM)、扫描电镜(SEM)、差热扫描量热法(DSC)等方法研究了材料的结构与性能。结果表明,环氧树脂/纳米S iO2灌封材料的冲击强度和弯曲强度随纳米S iO2含量而变化,当其含量为3%(质量分数)时二者出现最大值,与纯环氧树脂固化物相比冲击强度和弯曲强度分别提高了98%和112%。同时纳米S iO2的加入也使灌封材料的电性能和热性能得到改善,线膨胀系数明显降低,环氧树脂的粘度稍有增加。
Epoxy resin/nano-silica encapsulating materials were obtained from in situ polymerization, and microstructure and properties of the materials were investigated by transmission electron microscopy （TEM）, scanning electron microscopy （SEM） and differential scanning calorimetry（DSC） . The results showed that the interracial interactions differed between material systems,whereas impact strength and flexural strength of encapsulating materials were all improved by adding pretreated nano-silicas by an optimal content of 3~//00 （mass fraction）. The encapsulating materials containing pretreated nano-silicas had slightly higher viscosities, higher electricity properties and lower linear thermal expansion coefficiency compared with neat epoxy resin. DSC analyses showed that the addition of nano-silica increased the viscosity of epoxy resin.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2005年第8期32-34,38,共4页
Journal of Materials Engineering
关键词
原位聚合法
环氧树脂
纳米SIO2
灌封材料
in situ polymerization
epoxy resin
nano-silica
encapsulating material
