摘要
以丙烯酸丁酯(BA),丙烯酸异辛酯(2-EHA),丙烯酸羟丙酯(HPA)以及甲基丙烯酸甲酯(MMA)为聚合单体,采用普通自由基聚合合成了一系列溶剂型丙烯酸酯共聚物压敏胶。讨论了交联剂MDI用量不同对压敏胶热性能与使用性能的影响,并研究了加入氢化松香树脂对压敏胶性能的影响。用TGA以及DSC对其热性能进行了表征,并测试了得到的压敏胶的力学性能。结果表明,增加交联剂量能提高压敏胶的玻璃化转变温度与热稳定性,当MDI用量不超过单体总质量的0.5%时,增大MDI用量能有效改善压敏胶的力学性能;同时,发现加入氢化松香树脂能够较明显提高压敏胶的玻璃化转变温度,压敏胶的热稳定性能在初始添加氢化松香树脂时明显变好,但是随氢化松香树脂添加量的增加,分解温度没有明显变化,不过加入氢化松香树脂能够改善压敏胶的内聚力及180°剥离强度。
With using butyl acrylate （BA）, methyl methacrylate （MMA）, 2-ethylhexyl acrylate （2-EHA） and hydroxypropyl acrylate （HPA） as the monomers, the solvent based polyacrylate pressure sensitive adhesives （PSAs） were prepared by conventional radical polymerization with azobisisobutyronitrile （AIBN） as initiator. The effects of the amount of cross-linking agent diphenylmethane-4,4＇ -di-isocyanate （MDI） and the addition of hydrogenated rosin on the properties of the PSAs were researched, and the thermal properties were studied with using thermogravimetric analysis （TGA） and differential scanning calorimetry （DSC）, and the mechanical properties were also tested. It was concluded that the glass transition temperature （Tg） and the thermal stability of the PSAs were improved after increasing the amount of cross-linking agent, and when the mass ratio of MDI added was not exceeding 0.5wt% of the whole feeding monomers, the mechanical properties of the PSAs had also been improved. On the other hand, after modified by different amounts of hydrogenated rosin, the Tgs had been elevated obviously, whereas when the hydrogenated rosin was added, the thermal stability of the PSAs were improved obviously at the beginning, but the thermal stability did not change as the amount of hydrogenated rosin increased. However, the addition of hydrogenated rosin could improve the cohesion and 180° peel strength.
出处
《化学与粘合》
CAS
2011年第5期14-17,共4页
Chemistry and Adhesion
关键词
丙烯酸酯
压敏胶
热性能
力学性能
Acrylate
pressure sensitive adhesive
thermal properties
mechanical properties
