乙烯基三乙氧基硅烷(VTES)改性APAO-V基热熔胶及其性能研究  

Study on the modification of APAO-V based hot melt adhesive with vinyl triethoxysilane(VTES)and its properties

作　　者：胡媛 杨宏 李士娟 李秋影 郭卫红[1] Hu Yuan;Yang Hong;Li Shijuan;Li Qiuying;Guo Weihong(School of Materials Science and Engineering,East China University of Science and Technology,Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Key Laboratory of Advanced Polymeric Materials,Shanghai 200237,China)

机构地区：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海市先进聚合物材料重点实验室,上海200237

出　　处：《中国胶粘剂》2024年第6期15-22,40,共9页China Adhesives

基　　金：上海市科委“揭榜挂帅”项目(YDZX20223100004006)。

摘　　要：使用乙烯基三乙氧基硅烷(VTES)对聚α-烯烃(APAO)基热熔胶进行接枝改性,制备了高粘接强度、耐溶剂性、耐热性稳定的反应型聚α-烯烃-乙烯基三乙氧基硅烷(APAO-V)基热熔胶。探究了不同质量分数下VTES改性APAO后对所制备热熔胶体系各性能的影响,从而确定最佳配比。研究结果表明:(1)FT-IR曲线表明VTES发生水解进行自交联,VTES改性APAO成功;XRD衍射曲线表明VTES接枝APAO并未对其结晶形态产生影响。(2)当VTES的质量分数为8%时,VTES改性APAO基热熔胶的软化点、旋转黏度均达到最大值,分别为147.7℃、7025 mPa·s,APAO基热熔胶热稳定性能最好。(3)使用8%VTES改性APAO所制备的反应型APAO-V基热熔胶,改性后热熔胶的粘接强度在常温、高温(60℃)以及低温(-20℃)状态下均有提升,其中常温下粘接提升效果最好,剥离强度提升了15.0 N/cm。改性后热熔胶在浸水28 d后剥离强度仍能达到22.3 N/cm。(4)使用8%VTES改性APAO所制备的反应型APAO-V基热熔胶,比较热熔胶对4种不同塑料基材(PE、PVC、PP和ABS)的单搭接剪切强度,改性后APAO所制备的热熔胶的粘接性能均有很大程度的提升。A reactive poly alpha olefin vinyl triethoxysilane(APAO-V)based hot melt adhesive with high bonding strength,solvent resistance,and heat stability was prepared by grafting modification of poly alpha olefin(APAO)based hot melt adhesive with vinyl triethoxysilane(VTES).The effects of different mass fractions of VTES modified APAO on the various properties of the prepared hot melt adhesive system were explored,in order to determine the optimal ratio.The research results showed that:(1)The FT-IR curves indicated that VTES underwent hydrolysis and self-crosslinking,and VTES modified APAO successfully.The XRD diffraction curves indicated that VTES grafted APAO had no effect on its crystal morphology.(2)When the mass fraction of VTES was 8%,the softening point and rotational viscosity of VTES modified APAO based hot melt adhesive reached their maximum values,which were 147.7℃and 7025 mPa·s,respectively.APAO based hot melt adhesive had the best thermal stability performance.(3)The reactive APAO-V based hot melt adhesive prepared by modifying APAO with 8%VTES showed improved bonding strength at room temperature,high temperature(60℃),and low temperature(−20℃),among which the best bonding enhancement effect was at room temperature and the peel strength increased 15.0 N/cm.After being immersed in water for 28 days,the peel strength of the modified hot melt adhesive could still reach 22.3 N/cm.(4)The reactive APAO-V based hot melt adhesive prepared by modifying APAO with 8%VTES showed that,the single lap shear strength of hot melt adhesive on four different plastic substrates(PE,PVC,PP and ABS)was compared,the bonding performance of hot melt adhesive prepared by APAO after modification was greatly improved.

关 键 词：热熔胶 乙烯基三乙氧基硅烷 APAO-V基热熔胶 耐热性 粘接强度 

分 类 号：TQ436.4[化学工程]