液体端羧基丁腈橡胶增韧改性氰酸酯树脂

复合材料学报, 2005, 22(1): 1-5. doi: 10.3321/j.issn:1000-3851.2005.01.001

液体端羧基丁腈橡胶增韧改性氰酸酯树脂

王结良 ^1, , 梁国正 ^2, , 赵雯 ^3, , 吕生华 ^4, , 任鹏刚 ^5, , 杨洁颖 ^6,

1.西北工业大学,理学院,应用化学系,西安,710072

2.西北工业大学,理学院,应用化学系,西安,710072

3.西北工业大学,理学院,应用化学系,西安,710072

4.西北工业大学,理学院,应用化学系,西安,710072;陕西科技大学,皮革工程系,咸阳,712081

5.西北工业大学,理学院,应用化学系,西安,710072

6.西北工业大学,理学院,应用化学系,西安,710072

基金项目: 西北工业大学校科研和教改项目(Z20030099) 国家自然科学基金(50273029) 陕西省教育厅资助项目(03JK080)

关键词：氰酸酯树脂 , CTBN , 增韧改性

CYANATE ESTERS MODIFIED BY CARBOXYL-TERMINATED LIQUID BUTADIENE-ACRYLONITRILE

采用液体端羧基丁腈橡胶对双酚A型氰酸酯树脂进行增韧改性,通过对体系凝胶曲线和DSC曲线分析,确定了体系的固化条件,并在与纯CE比较的基础上,通过FTIR和DSC曲线知道了CTBN在低温阶段对体系固化有较为明显的影响,而在高温阶段对CE固化影响较小.通过对固化树脂微观性能、力学性能和电性能的观测,发现当CTBN含量为15%时,改性体系的弯曲强度和冲击强度分别提高了39.47%和21. 92%,改性体系综合力学性能最佳,但电性能稍有下降.另外,固化树脂的TGA曲线和HDT曲线表明树脂的耐热性能随着CTBN用量的增大而下降,当CTBN含量从0提高到15%时,树脂体系的起始分解温度从407℃降低到383℃.

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