摘要
采用二甲基二乙氧基硅烷(DMDES)通过物理和化学改性两种方法改性双酚A型环氧树脂。通过对两种方法得到的固化物的玻璃化转变温度(Tg)、拉伸强度及断裂伸长率进行了分析测定,探讨了改性方法、有机硅含量等对材料性能的影响。结果表明,化学改性环氧树脂产物具有更为优良的性能,环氧树脂E-44通过二甲基二乙氧基硅烷(DMDES)化学反应改性(质量比为100:8)后,拉伸强度达到63.13MPa,断裂伸长率达到11.68%,Tg达到166.07℃;比未改性的纯环氧树脂分别提高了14.19MPa,4.94%,13.54℃。
Bisphenol A epoxy resin was modified by dimethyldiethoxysilane （DMDES） by means of physical and chemical modification. Analytical testing was carried out of vitrification transition temperature （Tg）, tensile strength and fracture elongation of the cured materials obtained by way of the above-mentioned two methods and effects of modification methods and silicone content on material performance were discussed. Testing results showed that chemically modified epoxy resin displayed more superior properties. Epoxy resin E-44 modified chemically by DMDES （mass ratio of epoxy resin to DMDES was 100 ： 8） attained to a tensile strength of 63.13 MPa, fracture elongation of 11.68% and Tg of 166.07℃, more than those of unmodified pure epoxy resin by 14.19 MPa. 4.94%, 13.54℃.
出处
《化学建材》
2008年第5期23-25,共3页
Chemical Materials for Construction
基金
广州市科技局重点攻关资助项目(项目编号:2006Z3-D0301)
