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以丙烯酸酯类单体为原料,过氧化二苯甲酰为引发剂,甲苯、乙酸乙酯为溶剂,合成了聚丙烯酸酯类阻尼压敏胶。通过动态热机械分析测试(DMA)和180°剥离强度测试,研究了丙烯酸酯单体结构、增黏树脂以及固化剂对聚丙烯酸酯压敏胶阻尼和压敏性能的影响。研究结果表明:引入含有氢键结构的丙烯酸酯结构单元可明显提高聚丙烯酸酯压敏胶的损耗因子tanδmax值,这主要是氢键结构可以产生物理交联,增大分子间相互作用。增黏树脂对压敏胶阻尼性能的影响与增黏树脂的结构相关,氢化松香可提高聚丙烯酸酯压敏胶的损耗因子,而C5石油树脂、萜烯树脂和138松香甘油酯则不能。相同固化剂用量时,使用多异氰酸酯类固化剂比使用氮丙啶类固化剂交联的压敏胶具有更高的损耗因子tanδmax值。
Abstract：Polyacrylate-based damping pressure sensitive adhesive was synthesized with acrylate monomers as raw material,dibenzoyl peroxide as initiator,toluene and ethyl acetate as solvents. The effects of acrylate monomer structure,tackifying resin and curing agent on the damping properties and pressure-sensitive properties of polyacrylate pressure sensitive adhesive were studied by dynamic thermomechanical analysis(DMA)and 180° peel strength tests. The research results showed that the introduction of acrylate structural unit containing hydrogen bond structure could significantly increase the loss factor tanδmaxvalue of polyacrylate pressure sensitive adhesive,which was mainly because the hydrogen bond structure could form physical crosslinking and increase the intermolecular interaction. The influence of tackifying resin on the damping properties of pressure sensitive adhesive was related to the structure of tackifying resin. Hydrogenated rosin could improve the loss factor of polyacrylate pressure sensitive adhesive,while C5 petroleum resin,terpene resin and 138 rosin glyceride could not. With the same amount of curing agent,the pressure sensitive adhesive crosslinked by polyisocyanate curing agent had a higher loss factor tanδmaxvalue than that crosslinked by aziridine curing agent.
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基本信息:
DOI：10.13416/j.ca.2020.04.003
中图分类号:TQ436.3
引用信息:
[1]华广洲,李坚,汪称意等.聚丙烯酸酯类阻尼压敏胶的制备及其性能[J].中国胶粘剂,2020,29(04):8-14.DOI:10.13416/j.ca.2020.04.003.
基金信息: