含碳硼烷耐高温环氧树脂的合成与性能  

Synthesis and Properties of High Temperature Resistant Epoxy Resin Containing Carborane

作　　者：韩苇召 张锋锋 王锦艳[1] 蹇锡高[1] Weizhao Han;Fengfeng Zhang;Jinyan Wang;Xigao Jian(Department of Polymer,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院高分子系,辽宁大连116024

出　　处：《高分子材料科学与工程》2021年第11期22-28,共7页Polymer Materials Science & Engineering

基　　金：石油化工联合重点基金(B类)(U1663226)。

摘　　要：以1,2-双(4-羟基苯基)-邻碳硼烷(BHCB)为原料,一锅法合成了碳硼烷环氧树脂(DECB),选用市售环氧树脂AG80与DECB和本课题组的含杂萘联苯酮结构的四官能度环氧(TEPZ)进行复配,以DDS为固化剂制备固化产品。利用差示扫描量热分析探究了复配体系的固化反应动力学,并由此确定了固化条件;借助红外测试证实了该固化过后环氧基团反应完全。流变测试表明,少量DECB的加入能够使复配体系的加工窗口进一步拓宽,在150℃恒温条件下,复配体系黏度低于10Pa·s的时间可以维持2h,便于加工成型;动态力学热分析(DMA)表明,少量低环氧值DECB的加入对玻璃化转变变温T_(g)影响不大,保持在278℃以上;热失重分析(TGA)表明,少量DECB的加入即可明显提升800℃的残碳率;力学性能测试结果显示,大体积碳硼烷结构的加入可以增加固化交联网络结构的刚性,复配体系的弯曲强度最高至142.3MPa。Carborane epoxy resin(DECB)was synthesized with 1,2-bis(4-hydroxy phenyl)-o-carborane(BHCB)by one-pot method.The curing product was prepared by using commercially available epoxy resin AG-80,DECB and tetrafunctional epoxy(TEPZ)as curing agent.DSC test was used to explore the curing reaction kinetics of the composite system,and the curing conditions were determined according to FT-IR.Rheological tests show that a small amount of DECB can further expand the processing window of the complex system.The viscosity of the complex system is lower than 10 Pa·s for 2 h at 150℃,which is convenient for processing and molding.Dynamic mechanical analysis(DMA)show that the addition of DECB has little effect on the glass transition temperature(T_(g)),which remains above 278℃.Thermogravimetric analysis(TGA)show that the char yield at 800℃could significantly increase with the addition of DECB.The mechanical properties test results show that the addition of large volume structure carborane can increase the rigidity of the cured crosslinked network,and the bending strength of the composite system is up to 142.3 MPa.

关 键 词：碳硼烷 环氧树脂 流变性能 残碳率 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]