合成了端环氧基硅油与聚醚胺（D-230）的嵌段共聚物。采用端环氧基硅油和嵌段共聚物对双酚A型环氧树脂（E-51）进行改性。结果表明,采用端环氧基硅油和D-230的嵌段共聚物改性环氧树脂（EP）,效果优于端环氧基硅油改性的方式。采用4份端环氧基硅油预反应改性EP后,Tg由未改性的163.23℃提高到164.81℃。除耐热性有所提高外,其拉伸强度也几乎能保持不变,断裂伸长率由38.62%降低到30.53%,冲击强度由20.23 kJ/m2提高到32.51 kJ/m2。
Dimethyl siloxane and polyether amine（D-230） of block copolymers were synthesized.Modification on bisphenol A epoxy resin（E-51） was conducted by epoxy-terminated silicone and block copolymer separately.The results show that,using the epoxy-terminated silicone and D-230 of the block copolymer modified epoxy resin（EP） is better than epoxy-terminated silicone of the way epoxy modified.After pre-reaction on EP by epoxy-terminated silicone,the systems containing m（EP）∶m（epoxy-terminated silicone）=100∶4 is found that its Tg reaches 164.81 ℃,which is higher than that of unmodified EP with 1.58 ℃.In addition to improved thermal resistance,the tensile strength almost remains unchanged and elongation rate decreases 38.62% to 30.53%.The impact strength increases from 20.23 kJ/m2 to 32.51 kJ/m2.
参考文献
| [1] | K. Mimura;H. Ito;H. Fujioka .Toughening of epoxy resin modified with in situ polymerized thermoplastic polymers[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(22):9223-9233. |
| [2] | Particle toughening of polymers by plastic void growth[J].Composites science and technology,2010(6):p.885. |
| [3] | Harada M;Aoyama K;Ochi M .Influence of the loading rate on liquid-crystal line epoxy resin systems[J].Journal of Polymer Science, Part B. Polymer Physics,2005(11):1296-1302. |
| [4] | Zheng Y;Chonung K;Wang GL;Wei P;Jiang PK .Epoxy/Nano-Silica Composites: Curing Kinetics, Glass Transition Temperatures, Dielectric, and Thermal-Mechanical Performances[J].Journal of Applied Polymer Science,2009(2):917-927. |
| [5] | Honglu Liang;Demei Yu;Yunchuan Xie .Preparation of Nano-Ag Particles and Their Modification on the Mechanical and Dielectric Properties of Epoxy Resin[J].Polymer engineering and science,2009(11):2189-2194. |
| [6] | Yang, XT;Yi, FP;Xin, ZR;Zheng, SX .Morphology and mechanical properties of nanostructured blends of epoxy resin with poly(epsilon-caprolactone)-block-poly(butadiene-co-acrylonitrile)-block- poly(epsilon-caprolactone) triblock copolymer[J].Polymer: The International Journal for the Science and Technology of Polymers,2009(16):4089-4100. |
| [7] | Serrano E;Tercjak A;Kortaberria G;Pomposo JA;Mecerreyes D;Zafeiropoulos NE;Stamm M;Mondragon I .Nanostructured thermosetting systems by modification with epoxidized styrene-butadiene star block copolymers. Effect of epoxidation degree[J].Macromolecules,2006(6):2254-2261. |
| [8] | A.B.Cherian;E.T.Thachil .Modification of unsaturated polyesters using polyethylene glycol[J].Plastics, Rubber and Composites,2007(3):128-133. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%