增粘树脂与丙烯酸酯共存下的乳液聚合行为

将多种增粘树脂溶解在丙烯酸单体中，预乳化后参与乳液聚合。并研究了其乳液聚合反应行为，讨论了乳化剂、引发剂、保护胶体、增粘树脂选择以及其最佳用量，确定了最佳反应条件，得到与塑料粘结力高且贮存稳定性高、单体转化率达到99%以上的丙烯酸酯共聚物乳液。并用IR和DSC分析表征了溶有增粘树脂的丙烯酸乳液聚合物，可以证明的是单体都参与了聚合反应，加入的增粘树脂种类不同会影响聚合物的Tg值。通过试验发现当两种增粘树脂配比达到最佳值时，可以得到性能最好的胶粘剂。

Effect of tackifiers on the emulsion polymerization of acrylate

Acrylate monomers have been mixed with a variety of tackifiers and,after pre-emulsification,converted to acrylate copolymer latex adhesives by emulsion polymerization.The emulsion polymerization process was studied in detail in order to optimize the choice and amount of emulsifier,initiator,protective colloid,and tackifier.Polyacrylate latex adhesives with good cohesion and stability were prepared,with the conversion being over 99%.IR and DSC measurements indicated that complete polymerization of the monomers occurred and that the Tg value varied with the nature of the tackifier.Latex adhesives with the optimum combination of properties were obtained by using a mixture of two tackifiers in appropriate proportions.