液体端羧基丁腈橡胶增韧改性氰酸酯树脂  

CYANATE ESTERS MODIFIED BY CARBOXYL-TERMINATED LIQUID BUTADIENE-ACRYLONITRILE

作　　者：王结良[1] 梁国正[1] 赵雯[1] 吕生华[1] 任鹏刚[1] 杨洁颖[1] 

机构地区：[1]西北工业大学理学院应用化学系,西安710072

出　　处：《复合材料学报》2005年第1期1-5,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(50273029);西北工业大学研究生创业种子基金(Z20030099);陕西省教育厅专项科研基金(03JK080)

摘　　要：　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℃。Cyanate esters were modified by carboxyl-terminated liquid butadiene-acrylonitrile (CTBN) to improve their toughness. Optimized curing parameters were obtained by gel time curves and differential scanning calorimetry (DSC) of the systems. Fourier transform infrared spectrometry (FTIR) and DSC were employed to show the curing behavior of the systems. It was observed, by comparison with purified cyanate esters, that the addition of CTBN has great influence on the curing behavior of the systems at lower temperature, but little influence at higher temperature. Scanning electron microscopy (SEM) was employed to show the micro properties of the cured matrixes; mechanical properties and dielectric properties of the cured resin were measured. It showed that when 15% CTBN was added to cyanate ester, the best modified system was gotten; its flexural strength and impact strength were increased by 39.47% and 21.92% respectively. Additionally, as shown in the TGA curves of the systems, with the increasing content of CTBN from 0 to 15%, the thermal degradation temperature decreased from 407°C to 383°C.

关 键 词：氰酸酯树脂 CTBN 增韧改性 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ323.5[化学工程—合成树脂塑料工业]