用液体端羧基丁腈橡胶(CTBN)对固体环氧树脂(EP)进行改性,合成了CTBN-EP预聚物,研究了CTBN-EP/HTP-305体系的微观形貌、力学性能和热性能.研究结果表明,随着CTBN含量的增大,冲击强度及断裂伸长率显著提高,说明通过CTBN化学预聚改性的EP韧性提高,而体系的拉伸强度和热性能略有下降.动态热机械分析(DMA)测试体系的动态力学性能结果表明,体系出现了两相结构(Tg对应温度分别是-60℃和80℃～100℃).扫描电镜(SEM)分析表明,固化过程中析出了橡胶相并均匀分散在环氧树脂基体中,形成了剪切空洞变形结构.
参考文献
| [1] | Yingfeng Yu;Minghai Wang;David Foix .Rheological Study of Epoxy Systems Blended with Poly(ether sulfone)of Different Molecular Weights[J].Industrial & Engineering Chemistry Research,2008(23):9361-9369. |
| [2] | 范宏,王建黎.PBA／PMMA型核壳弹性粒子增韧环氧树脂研究[J].高分子材料科学与工程,2001(01):121-124. |
| [3] | Liu J;Sue HJ;Thompson ZJ;Bates FS;Dettloff M;Jacob G;Verghese N;Pham H .Nanocavitation in Self-Assembled Amphiphilic Block Copolymer-Modified Epoxy[J].Macromolecules,2008(20):7616-7624. |
| [4] | Raju Thomas;Ding Yumei;He Yuelong .Miscibility,morphology,thermal,and mechanical properties of a DGEBA based epoxy resin toughened with a liquid rubber[J].Polymer: The International Journal for the Science and Technology of Polymers,2008(1):278-294. |
| [5] | 石敏先,黄志雄,郦亚铭,杨国瑞.端羧基丁腈橡胶改性环氧树脂的结构与性能[J].高分子材料科学与工程,2008(02):47-50. |
| [6] | 孙振华,罗辉阳,赵世琦.橡胶增韧环氧树脂的增韧力学模型综述[J].高分子材料科学与工程,2001(02):1-4. |
| [7] | Thomas R;Durix S;Sinturel C;Omonov T;Goossens S;Groeninckx G;Moldenaers P;Thomas S .Cure kinetics, morphology and miscibility of modified DGEBA-based epoxy resin - Effects of a liquid rubber inclusion[J].Polymer: The International Journal for the Science and Technology of Polymers,2007(6):1695-1710. |
| [8] | Wise C.W. .CTBN rubber phase precipitation in model epoxy resins[J].Polymer: The International Journal for the Science and Technology of Polymers,2000(12):4625-4633. |
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