摘要
为研究增塑剂邻苯二甲酸二辛酯(DOP)在丙烯酸酯压敏胶中的扩散行为,制备了丙烯酸异辛酯(2-EHA)、丙烯酸甲酯(MA)和丙烯酸(AA)体系的压敏胶.采用分子量分布(GPC)、动态力学分析(DMA)、热失重分析(TG)和力学测试等方法,考察了引发剂用量、不同增塑剂浓度下交联剂用量,以及同一交联剂用量下不同增塑剂和增黏树脂用量对压敏胶性能的影响.研究结果表明:随着胶样分子量的增加,增塑剂DOP的扩散行为会减缓并趋于平衡;随着胶样交联程度的提高,增塑剂DOP的扩散行为会明显减缓;同时改变交联剂与DOP用量时,交联剂和DOP均会使初粘力和剥离强度降低;DOP进入含增黏树脂体系丙烯酸酯胶层后,粘接升降行为还会随增黏树脂含量而改变.
Abstract
In order to investigate the diffusion behavior of plasticizer dioctyl phthalate(DOP)in acrylate pressure sensitive adhesive,the pressure sensitive adhesive system consisting of 2-ethylhexyl acrylate(2-EHA),methyl acrylate(MA),and acrylic acid(AA)was prepared.Using methods such as molecular weight distribution(GPC),dynamic mechanical analysis(DMA),thermogravimetric analysis(TG),and mechanical testing,the effects of initiator content,crosslinking agent content at different plasticizer concentrations,and different plasticizer and tackifying resin contents under the same crosslinking agent content on the performance of pressure sensitive adhesive were investigated.The research results showed that when the molecular weight increased,the diffusion behavior of plasticizer DOP slowed down and tended towards equilibrium.As the crosslinking degree of adhesive sample increased,the diffusion behavior of plasticizer DOP would be significantly slowed down.When the contents of crosslinking agent and DOP were changed simultaneously,both crosslinking agent and DOP would reduce the initial tack and peel strength.After DOP entered the acrylate adhesive layer containing the tackifying resin system,the adhesion behavior would also change with the content of the tackifying resin.
NETL
NSTL
万方数据