醋酸乙烯酯对聚丙烯酸酯压敏胶性能的影响  

Effect of vinyl acetate on the performance of polyacrylate pressure-sensitive adhesive

作　　者：张鑫 黄鹤 Zhang Xin;Huang He(College of Chemistry,Chemical Engineering and Materials Science of Soochow University,State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials,Suzhou 215123,Jiangsu,China)

机构地区：[1]苏州大学材料与化学化工学部,新型功能高分子材料国家地方联合工程实验室,江苏苏州215123

出　　处：《中国胶粘剂》2025年第3期10-16,共7页China Adhesives

摘　　要：醋酸乙烯酯是介于传统的丙烯酸酯软、硬单体之间的一类中间单体,常常用于聚丙烯酸酯压敏胶的制备中,但通过改变醋酸乙烯酯的量来调节丙烯酸酯压敏胶的性能尚无系统的研究报道。为此,本文通过中间单体醋酸乙烯酯与传统的丙烯酸酯软、硬单体的溶液共聚合,制备了聚丙烯酸酯压敏胶。详细研究了中间单体醋酸乙烯酯对聚丙烯酸酯压敏胶性能的影响,并与传统的硬单体甲基丙烯酸甲酯进行了对比。研究结果表明:(1)随着醋酸乙烯酯用量的增大,压敏胶的内聚力增大,与基材的黏附性降低。当醋酸乙烯酯用量达9.5%时,呈现界面破坏,剥离强度能达到18.78 N/25 mm,此时持粘力、初粘力分别为1.10 h、4#球。(2)相对于传统的硬单体甲基丙烯酸甲酯,中间单体醋酸乙烯酯的使用,对压敏胶的初粘力及持粘力贡献都没有优势,但可提高剥离强度达20%左右。Vinyl acetate is a kind of intermediate monomer between traditional soft and hard acrylate monomers,and is often used in the preparation of polyacrylate pressure-sensitive adhesive.However,there is no systematic study report on adjusting the performance of polyacrylate pressure-sensitive adhesive by changing the amount of vinyl acetate.Therefore,in this paper,polyacrylate pressure-sensitive adhesive was prepared by solution copolymerization of intermediate monomer vinyl acetate with traditional soft and hard acrylate monomers.The effect of intermediate monomer vinyl acetate on the performance of polyacrylate pressure-sensitive adhesive was studied in details and it was compared with that of the traditional hard monomer methyl methacrylate.The research results showed that,(1)As the amount of vinyl acetate increased,the cohesion of pressure-sensitive adhesive increased,and the adhesion to the substrate decreased.When the amount of vinyl acetate reached 9.5%,interface failure occurred,and the peel strength could reach 18.78 N/25 mm.At this time,the holding power and initial tack were 1.10 h and 4#ball,respectively.(2)Compared to traditional hard monomer methyl methacrylate,the use of intermediate monomer vinyl acetate had no advantage in contributing to the initial tack and holding power of pressure-sensitive adhesive,but could increase the peel strength by about 20%.

关 键 词：溶液聚合 聚丙烯酸酯 压敏胶 醋酸乙烯酯 

分 类 号：TQ436.3[化学工程]