二胺型苯并噁嗪改性双酚A环氧树脂及其玻璃纤维复合材料性能研究  

Study on properties of diamine-type benzoxazine modified bisphenol A epoxy resin and its glass fiber reinforced composites

作　　者：程圣 谢志辉 何伟韩 张跃 梁智明 黄泽 张伟[2] 冉起超[2] CHENG Sheng;XIE Zhihui;HE Weihan;ZHANG Yue;LIANG Zhiming;HUANG Ze;ZHANG Wei;RAN Qichao(Dongfang Electric Machinary Co.,Ltd.,Deyang 618000,China;College of Polymer Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]东方电气集团东方电机有限公司,德阳618000 [2]四川大学高分子科学与工程学院,成都610065

出　　处：《复合材料科学与工程》2024年第6期29-33,59,共6页Composites Science and Engineering

摘　　要：为了延长环氧树脂漆的适用期,提高其耐热性,使用苯并噁嗪树脂对其进行共混改性。以溶液共混方式制备了环氧树脂漆(EP)与苯并噁嗪树脂(BZ)的共混树脂体系(E/B-x),讨论了BZ的加入对共混树脂的黏度、流变特性、凝胶化活化能、固化行为、表面特性及玻布增强复合材料的耐热性、力学性能的影响。结果表明:BZ的加入使共混树脂的黏度明显降低,凝胶温度及凝胶活化能增加,迟滞了EP的固化反应,延长了其适用期;少量BZ的加入不会改变EP的玻璃化转变温度(Tg),当BZ加入量达到40份时,与EP复合材料相比,E/B-40复合材料的干态和湿态Tg分别提高了12.6%和11.7%;随BZ加入量的增加,复合材料的弯曲强度先下降后上升,E/B-40复合材料的弯曲强度和弯曲模量可达569 MPa和27.9 GPa,与EP复合材料相当。To extend the shelf life of epoxy resin and enhance its heat resistance,benzoxazine resin can be used for blending modification.Blending resin systems(E/B-x)of epoxy resin(EP)and benzoxazine resin(BZ)with different mass ratios were prepared in solution.Their viscosities,rheological properties,gelation activation energies and curing exothermic peaks were tested and analyzed.After the addition of BZ,the viscosities become low and the gelation activation energies increase,which delays the curing reaction to a certain degree.In addition,the copolymerization reaction was analyzed by FTIR technology.Then,the surface properties of the copolymer were investigated and showed that the water contact angle of the copolymer was gradually increased with the increase of addition of BZ.Furthermore,glass cloth reinforced composites were prepared,and their dry and wet Tgs were obtained by DMA.Compared with EP composite,dry and wet Tgs of E/B-40 composite with 40wt%of BZ increase by 12.6%and 11.7%,respectively.Moreover,its flexural strength and modulus achieve 569 MPa and 27.9 GPa,respectively.

关 键 词：环氧树脂 苯并噁嗪 共聚 湿态玻璃化转变温度 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]