期刊文献+

苯并噁嗪改性氰酸酯树脂的制备及性能 被引量:6

Preparation and Performance of Benzoxazine Modified Cyanate Ester Resin
下载PDF
导出
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.
作者 周晖 王帆 刘荣鹏 朱亚平 齐会民 ZHOU Hui;WANG Fan;LIU Rong-peng;ZHU Ya-ping;QI Hui-min(School of Materials Science and Engineering,East China University of Science and Technology, Shanghai 200237,China;Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education,East China University of Science and Technology,Shanghai 200237,China;Shanghai Composite Material&Technology Co.Ltd,Shanghai 200120,China)
出处 《功能高分子学报》 CAS CSCD 北大核心 2018年第6期602-608,共7页 Journal of Functional Polymers
基金 上海航天科技创新基金(SAST2016120)
关键词 氰酸酯 苯并噁嗪 零收缩 cyanate ester benzoxazine zero shrinkage
  • 相关文献

参考文献2

二级参考文献18

共引文献10

同被引文献52

引证文献6

二级引证文献10

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部