BPA-PA酚醛环氧树脂导电胶的合成与性能研究  

Studyon synthesis and performance of BPA-PA phenolic epoxy resin conductive adhesive

作　　者：郭睿[1] 李平安 赵云飞 GUO Rui;LI Pingan;ZHAO Yunfei(Key Laboratory of Auxiliary Chemistry and Technology for Light Chemicals, Ministry of Education,Shaanxi University of Science and Technology, Xi'an 710021, China)

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《功能材料》2022年第3期3167-3174,共8页Journal of Functional Materials

基　　金：陕西省重点研发计划项目(2017GY-185,2017ZDXM-GY-087)。

摘　　要：以双酚A多聚甲醛酚醛树脂(BPA-PA酚醛树脂)和环氧氯丙烷为原料,通过亲核取代反应得到BPA-PA酚醛环氧树脂。采用FT-IR、^(1)HNMR进行结构确证。通过单因素和正交实验得到BPA-PA酚醛环氧树脂的最佳合成工艺条件:在环氧氯丙烷用量为80 g,催化剂用量为0.5 g,反应温度为80℃,反应时间为3 h,10%(质量分数)NaOH用量为15 g条件下,环氧值达到0.565。然后结合非等温DSC、T-β外推直线和FTIR分析研究了最佳固化工艺条件。最后以BPA-PA酚醛环氧树脂为基体树脂,加以导电填料和助剂,制备出中温型导电胶。对其导电胶进行拉伸剪切强度、体积电阻率、热重和扫描电镜测试分析。结果显示:自制BPA-PA酚醛环氧树脂导电胶拉伸剪切强度达到17.04 MPa、体积电阻率达到8.65×10^(-4)Ω·cm、残碳量达到65.28%。相对市售E-51环氧树脂所制导电胶,自制BPA-PA酚醛环氧树脂导电胶拉伸剪切强度提高2.59 MPa,体积电阻率降低2.65×10^(-4)Ω·cm,残炭量提高3.88%。Using bisphenol A paraformaldehyde phenolic resin(BPA-PA phenolic resin)and epichlorohydrin as raw materials,BPA-PA phenolic epoxy resin is obtained through nucleophilic substitution reaction.FTIR and ^(1)HNMR are used to confirm the structure.The optimal synthesis process conditions of BPA-PA novolac epoxy resin are obtained through single factor and orthogonal experiments:the amount of epichlorohydrin of 80 g,the amount of catalyst of 0.5 g,the reaction temperature of 80℃and the reaction time of 3 h.When the amount of 10 wt%NaOH is 15 g,the epoxy value reaches 0.565.Then combined non-isothermal DSC,T-βextrapolation line and FT-IR analysis,the best curing process conditions are studied.Finally,the BPA-PA phenolic epoxy resin is used as the matrix resin,and conductive fillers and additives are added to prepare a medium-temperature conductive adhesive.Tensile shear strength,volume resistivity,thermogravimetry and scanning electron microscopy test are conducted for its conductive adhesive.The results show that the self-made BPA-PA phenolic epoxy resin conductive adhesive has a tensile shear strength of 17.04 MPa,a volume resistivity of 8.65×10^(-4)Ω·cm,and a residual carbon content of 65.28%.Compared with the commercially available conductive adhesive made of E-51 epoxy resin,the self-made BPA-PA phenolic epoxy resin conductive adhesive has increased tensile shear strength by 2.59 MPa,reduced volume resistivity by 2.65×10^(-4)Ω·cm,and increased carbon residue by 3.88%.

关 键 词：BPA-PA酚醛环氧树脂导电胶 环氧值 固化工艺条件 粘结性能 导电性能 耐热性能 

分 类 号：TQ433[化学工程]