利用扫描电镜(SEM),差示扫描量热法(DSC)和动态热机械分析(DMA)研究了双酚A环氧树脂与酚封端的聚氨酯在微波照射下体系的相行为以及相容性.SEM结果显示EP/PU体系微波固化后呈两相结构.DSC和DMA研究结果表明,在EP和PU相之间存在过渡区域.组成一定时,过渡区域的玻璃化转变温度(Tg)随微波功率的增加而增加,随EP和PU含量接近而变宽.比较热固化和420 W的微波固化的DMA,热固化产品过渡区和EP相的Tg及宽度均低于微波固化产品,这说明微波固化能提高体系各组分之间的相容性.
参考文献
| [1] | 金钦汉;戴树珊;黄卡玛.微波化学[M].北京:科学出版社,2000:144-147. |
| [2] | Mijovic J;Wijaya J .Comparative Calorimetric Study of Epoxy Cure by Microwave vs.Thermal Energy[J].MACROMOLECULES,1990,23(15):3671-3674. |
| [3] | Jordan C;Galy J;Pascault JP et al.Comparison of Mi crowave and Thermal Cure of an Epoxy/Amine Matrix[J].Polymer Engineering and Science,1995,35(03):233-239. |
| [4] | Meuse M T;Ryan C L .The Microwave Processing of Polymeric Materials[J].Advances in Polymer Technology,1993,12(02):197-203. |
| [5] | Bai S L;Djafari V;Andreani M;Francois D .A Comparative Study of the Mechanical Behavior of an Epoxy Resin Cured by Microwaves with One Cured Thermally[J].European Polymer Journal,1995,31(09):875-884. |
| [6] | Jullien H;Volat H.Polyurethane Curing by a Pulsed Microwave Field[J].POLYMER,1985(26):506-510. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%