丙烯酸酯乳液压敏胶剥离强度稳定性的研究

Study on the Peel Strength Stability of Acrylic Emulsion Pressure Sensitive Adhesive

为解决乳液压敏胶剥离强度随粘贴时间延长而增大的问题,采用乳液聚合方法合成丙烯酸酯乳液压敏胶,研究玻璃化转变温度和粒子结构对剥离强度稳定性的影响;又采用悬浮聚合方法合成微米级粘性粒子,并掺混到乳液压敏胶中,进一步探究压敏胶的剥离强度变化规律。结果表明:玻璃化转变温度的增加和粒子结构对乳液压敏胶剥离强度的稳定性有一定的改善效果,但效果有限;掺混粘性微球可有效解决压敏胶的后增强问题,但对粘接强度有明显的降低作用。

In order to solve the problem that the peel strength of the emulsion pressure sensitive adhesive increases with the extension of the pasting time,firstly,the acrylic emulsion pressure sensitive adhesive was synthesized by the emulsion polymerization method,and the effect of the glass transition temperature and the particle structure on the peel strength stability was studied.On this basis,micron-sized viscous particles were synthesized by the suspension polymerization method and blended into the emulsion pressure sensitive adhesive to further explore the peel strength of the pressure sensitive adhesive.The results show that the increase of the glass transition temperature and the particle structure have a certain effect on the stability of the peel strength of the emulsion pressure sensitive adhesive,but the effect is limited.Blending of viscous microspheres can effectively solve the post-reinforcement problem of pressure-sensitive adhesives,but leads to a significant decrease in bonding strength.