文献类型：期刊文献

中文题名：苯并噁嗪改性氰酸酯树脂的制备及性能

英文题名：Preparation and Performance of Benzoxazine Modified Cyanate Ester Resin

作者：周晖[1];王帆[1,2];刘荣鹏[3];朱亚平[1];齐会民[1,2]

机构：[1]华东理工大学材料科学与工程学院,上海200237;[2]华东理工大学特种功能高分子材料及相关技术教育部重点实验室,上海200237;[3]上海复合材料科技有限公司,上海200120

年份：2018

卷号：31

期号：6

起止页码：602

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：上海航天科技创新基金(SAST2016120)

语种：中文

中文关键词：氰酸酯;苯并噁嗪;零收缩

外文关键词：cyanate ester;benzoxazine;zero shrinkage

摘要：采用溶剂混合法制备了苯并噁嗪质量分数不同的苯并噁嗪改性氰酸酯树脂体系,采用差示扫描量热法(DSC)考察改性树脂的固化行为,采用密度法研究了改性树脂固化过程的收缩情况,考察了改性树脂的热稳定性和耐湿热性能等。结果表明:改性树脂体系的固化温度比氰酸酯树脂的固化温度至少降低25℃,具有自催化效果;苯并噁嗪开环聚合与氰酸酯发生环三嗪环的环三聚反应,改性树脂在固化过程中无收缩,固化物密度减小。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℃左右,1 000℃时热解残留率提高0.2%;改性树脂吸湿率低,其在沸水中放置72h时吸湿率小于3%;改性树脂浇铸体弯曲强度达144.6MPa,弯曲模量为4.44GPa,经湿热老化后弯曲强度保留率达到63%,弯曲模量上升到4.62GPa,具有良好的耐湿热性能。
Benzoxazine(BO)resin modified cyanate ester(CE)resins were prepared by solvent blending method.Their curing behaviors were studied by Differential Scanning Calorimetry(DSC).Their curing shrinkages were investigated by density measurement.The thermal properties,hygrothermal resistance and mechanical properties of the modified resins were also investigated.The results showed that the modified resins offered good processability which could be cured without any catalyst.Their onset temperatures of curing reaction decreased by more than 25℃with outstanding autocatalysis.The resins were cured with no shrinking but slight swelling 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(T g)and onset decomposed temperature of 5%benzoxazine modified cyanate ester resins decreased by 20℃,and the char yield increased by 0.2%at 1 000℃compared to the cyanate ester resin.The water uptake rate of the cured resins was lower than 3%after 72 h in boiling water.Flexural strength of the cured resin reached 144.6 MPa,and flexural modulus was 4.44 GPa.The retention rate of flexural strength was 63%after wet and heat aging and the flexural modulus rose to 4.62 GPa,which showed good humidity and heat resistance.