聚苯乙烯/聚丙烯酸丁酯自交联胶乳互穿聚合物网络的力学性能和动态力学性能

采用种子乳液聚合制备了聚苯乙烯/聚丙烯酸丁酯自交联胶乳互穿聚合物网络。拉伸实验结果表明,用双丙酮丙烯酰胺和己二酸二酰肼自交联的胶乳互穿聚合物网络(LIPN)比相应的胶乳互穿聚合物网络具有较高的拉伸强度,并且随双丙酮丙烯酰胺用量的增加,拉伸强度增加以及永久变形降低,但离子键和氢键交联的LIPN具有很高的扯断伸长率和很大的永久变形,这些说明用双丙酮丙烯酰胺和己二酸二酰肼界面共价键交联能很好地改善力学性能和抗蠕变性能。动态力学谱结果表明,用双丙酮丙烯酰胺和己二酸二酰肼交联的LIPN比相应的LIPN以及离子键和氢键交联的LIPN具有较好的组分相容性和阻尼性能。

Mechanical and dynamic mechanical properties of self-crosslinkable latex interpenetrating polymer network based on polystyrene and poly(butyl acrylate)

Self-crosslinkable latex interpenetrating polymer network (LIPN) based on polystyrene and poly(butyl acrylate) was prepared by seed emulsion polymerization. The results of tension tests showed that the LIPN crosslinked with diacetone acrylamide and adipyl dihydrazide had higher tensile strength than that of the corresponding latex interpenetrating polymer network and their tensile strength increased and permanent sets decreased with increasing the content of diacetone acrylamide, but the LIPN crosslinked by hydrogen and ionic bonds had much higher elongation at break and permanent set. These suggested that the interfacial covalent-bond crosslinked with diacetone acrylamide and adipyl dihydrazide could obviously improve mechanical and creep-resistant properties. The results of dynamic mechanical spectra showed that the self-crosslinkable LIPN crosslinked with diacetone acrylamide and adipyl dihydrazide had much more component compatibility and damping properties than the corresponding LIPN and the LIPN crosslinked by hydrogen and ionic bonds.