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投稿时间：2018-02-04 修订日期：2018-03-12
投稿时间：2018-02-04 修订日期：2018-03-12
中文摘要: 通过溶剂混合法制备了不同配比的苯并噁嗪改性氰酸酯树脂体系，通过差示扫描量热法（DSC）研究改性树脂的固化行为，采用密度法研究了改性树脂的固化过程收缩情况，并对研究了改性树脂的热稳定性、耐湿热性能等。结果表明：改性树脂体系的固化温度比氰酸酯树脂降低了25°C以上，具有自催化效果；苯并噁嗪的开环聚合反应与氰酸酯形成环三嗪环的环三聚反应的作用，使得改性树脂固化过程无收缩，固化物密度小。改性树脂固化物的耐热性能略有下降，玻璃化转变温度Tg与起始分解温度Td5均下降20°C左右，1000°C热解残留率提高0.2%；改性树脂吸湿率低，沸水中72h吸湿率小于3%；改性树脂浇铸体弯曲强度达144MPa，弯曲模量4.44GPa，经湿热老化后强度保留率63%，具有良好的耐湿热性能。
Abstract:Benzoxazine (BO) resin modified cyanate ester (CE) resins excluding catalyst was prepared by solvent blending method. Their curing behavior was studied by differential scanning calorimetry (DSC). Their curing shrinkage was investigated by density measurement. The thermal properties, hygrothermal resistance and mechanical properties of the modified resins were mainly investigated. The results showed that the modified resins offers good processability which could be cured without any catalyst. Their onset temperature of curing reaction decreased more than 25°C with outstanding autocatalysis. The resins cured with no shrinking but little swell to form low density cured resins. The heat resistant performance of the cured resins slightly decreased compared to the cyanate ester resin. The glass-transition temperature (Tg) and onset decomposed temperature (Td5) of 5wt% benzoxazine modified cyanate ester resins decreased 20°C, and the char yield increased by 0.2% at 1000°C compared to the cyanate ester resin. The water uptake rate of the cured resins was lower than 3% after 72h in boiling water. Flexural strength of the cured resin was reach to 144MPa, and flexural modulus was 4.44GPa. The retention rate of flexural strength was 63% after wet and heat aging and the flexural modulus raised to 4.62GPa.
文章编号：20180204001 中图分类号：TB332 文献标志码：
基金项目:上海航天科技创新基金
| Author Name | Affiliation | Address |
| ZHOU Hui | East China University of Science and Technology | 上海市徐汇区梅陇路130号华东理工大学 |
| WANG Fan | East China University of Science and Technology | |
| LIU Rongpeng | East China University of Science and Technology | |
| ZHU Yaping | East China University of Science and Technology | |
| QI Huimin | East China University of Science and Technology | 上海市徐汇区梅陇路130号华东理工大学 |
引用本文：
周晖,王帆,刘荣鹏,朱亚平,齐会民.苯并噁嗪改性氰酸酯树脂的制备及性能[J].功能高分子学报,DOI:Doi:10.14133/j.cnki.1008-9357.20180204001.
ZHOU Hui,WANG Fan,LIU Rongpeng,ZHU Yaping,QI Huimin.Preparation and Performance of Benzoxazine Modified Cyanate Ester Resin[J].Journal of Functional Polymers,DOI:Doi:10.14133/j.cnki.1008-9357.20180204001.
周晖,王帆,刘荣鹏,朱亚平,齐会民.苯并噁嗪改性氰酸酯树脂的制备及性能[J].功能高分子学报,DOI:Doi:10.14133/j.cnki.1008-9357.20180204001.
ZHOU Hui,WANG Fan,LIU Rongpeng,ZHU Yaping,QI Huimin.Preparation and Performance of Benzoxazine Modified Cyanate Ester Resin[J].Journal of Functional Polymers,DOI:Doi:10.14133/j.cnki.1008-9357.20180204001.
