嵌段共聚物PEO—PPO—PEO增韧环氧树脂的研究

采用嵌段共聚物PEO—PPO-PEO对环氧树脂进行增韧改性。结果表明，PEO—PPO—PEO对环氧树脂具有较好的增韧改性作用，PEO—PPO—PEO／EP／MeTHPA体系的冲击强度随着嵌段共聚物含量的增加而增大，而对拉伸强度影响较小。当F38质量分数为20％时，固化物的冲击强度能提高190％，而拉伸强度仅下降6．2％。TG测试结果表明，PEO—PPO—PEO的加入对环氧固化物的热性能影响不大。

Modification of epoxy resin by addition amphiphilic diblock copolymer PEO-PPO-PEO

Epoxy resin was modified by addition amphiphilic diblock copolymer PEO-PPO-PEO.The results showed that the impact strength of modified resin increased with increasing of content of the diblock copolymer,while the tensile strength reduced a little.When content of diblock copolymer F38 is 20%,by weight,the impact strength of cured resin can be improved by 190%),with only 6.2%reducing of tensile strength.The TG results of the modified resin indicated that addition of the diblock copolymer has little effect on ...