在宽温度范围内具备低模量压敏胶的制备和性能研究  

Preparation and properties of low modulus pressure sensitive adhesive in a wide temperature range

作　　者：乔立根 巫柯 白永平 Qiao Ligen;Wu Ke;Bai Yongping(Guangzhou Lushan New Materials Co.,Ltd.,Guangzhou 510530,Guangdong,China;School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China)

机构地区：[1]广州鹿山新材料股份有限公司,广东广州510530 [2]哈尔滨工业大学化工与化学学院,黑龙江哈尔滨150001

出　　处：《中国胶粘剂》2024年第7期43-47,58,共6页China Adhesives

摘　　要：使用丙烯酸异辛酯(2-EHA)作为软单体,丙烯酸甲酯(MA)作为硬单体,4-羟基丁基丙烯酸酯缩水甘油醚(4-HBAGE)、丙烯酸羟乙酯(2-HEA)作为官能单体,1,6-己二醇二丙烯酸酯(HDDA)作为内交联单体,醚化氨基树脂(L-109-65)作为热固化交联剂,采用溶剂法自由基连锁加聚工艺制得聚丙烯酸酯压敏胶。探讨了原胶配方中软硬单体的比例、HDDA的添加量、热固化交联剂的添加量对压敏胶性能、不同温度下弹性模量的影响。研究结果表明:(1)硬单体(MA)质量比的增加,会造成丙烯酸酯压敏胶的初粘力不断降低,持粘力不断增加,剥离强度先增加后降低;储能模量均随着样品温度的逐渐升高而逐渐降低。综合压敏胶性能和不同温度下的模量数据,选择软硬单体的质量比为89∶11较好。(2)当过氧化苯甲酸叔丁酯(TBPB,引发剂C)添加量为0.2%、HDDA添加量为0.3%时,制备的丙烯酸酯压敏胶的重均分子量(Mw)可以达到1.02×10^(6),数均分子量(Mn)可以达到3.10×10^(5)。(3)探究了热固化交联剂添加量对压敏胶性能和不同温度下模量的影响,热固化交联剂的添加量选择0.45%(质量分数)为宜。(4)所制备的丙烯酸酯压敏胶在原胶拥有高分子量的同时,还能够兼顾较好的高温(80℃)持粘力,初粘力较好,剥离强度较高,是一款压敏性能优异、在宽温度范围内具备低模量的溶剂型丙烯酸酯压敏胶。Polyacrylate pressure sensitive adhesive was prepared by using 2-ethylhexyl acrylate(2-EHA)as the soft monomer,methyl acrylate(MA)as the hard monomer,4-hydroxybutyl acrylate glycidyl ether(4-HBAGE)and hydroxyethyl acrylate(2-HEA)as the functional monomers,1,6-hexanediol diacrylate(HDDA)as the internal crosslinking monomer,etherified amino resin(L-109-65)as the thermosetting crosslinking agent through solvent-based free radical chain addition polymerization process.The effects of the ratio of soft and hard monomers in the original adhesive formula,the addition amount of HDDA,and the addition amount of thermosetting crosslinking agent on the pressure sensitive adhesive performance and elastic modulus at different temperatures were explored.The research results showed that,(1)The increase in the mass ratio of hard monomer(MA)would cause a continuous decrease in the tack of acrylic pressure sensitive adhesive,an increase in holding power,and first an increase in peel strength followed by a decrease.The storage modulus gradually decreased as the sample temperature increased.Based on the comprehensive performance of pressure sensitive adhesive and modulus data at different temperatures,a mass ratio of 89∶11 for soft and hard monomers was selected preferably.(2)When the addition amount of tert-butyl peroxybenzoate(TBPB,initiator C)was 0.2%and the addition amount of HDDA was 0.3%,the weight average molecular weight(Mw)of the prepared acrylic pressure sensitive adhesive could reach 1.02×10^(6),and the number average molecular weight(Mn)could reach 3.10×10^(5).(3)The effects of the addition amount of thermosetting crosslinking agent on the properties of pressure sensitive adhesive and modulus at different temperatures were investigated.The appropriate addition amount of thermosetting crosslinking agent was 0.45%(mass fraction).(4)The prepared acrylic pressure sensitive adhesive not only had high molecular weight in the original adhesive,but also had good high-temperature(80℃)holding power,good initial tack,and high p

关 键 词：丙烯酸酯压敏胶 低模量 高分子量 溶剂型 

分 类 号：TQ436.3[化学工程]