聚二甲基硅氧烷／聚甲基丙烯酸甲酯互穿聚合物网络阻尼性能研究

Damping properties of polydimethylsiloxane/polymethlyacrylate interpenetrating polymer networks （PDMS/PMA IPNs）

采用同步聚合的方法，制备出聚二甲基硅氧烷／聚丙烯酸甲酯互穿聚合物网络（PDMS／PMAIPNs），并用动态力学分析和扫描电镜研究了复合体系的动态力学性能和微观形貌。结果表明，随着复合体系中PMA用量与交联剂TEOS用量的增加，复合体系的损耗峰都先增加随后下降，在PMA／PDMS=100：100，TEOS为2％PDMS时，阻尼值（tanδ）达到最大，为0．65，tanδ〉0．3的温度范围拓宽了9℃。Tanδ〉0．3的温度范围拓宽至5～51℃。对不同PMA／PDMS组分比例复合体系的SEM分析表明，对于PDMS／PMA=100：100的复合体系，PDMS与PMA呈部分双相连续的特征。所研制出的材料可用于室温区域的阻尼减震。

A series of polydimethylsiloxane/polymethlyacrylate interpenetrating polymer networks （PDMS/PMA IPNs） were prepared by simultaneously polymerization and characterized by dynamic mechanical analysis（DMA） and SEM. DMA shows that increasing the content of PMA and TEOS, the loss peak increased first and then decreased. Both the loss factor maximum, tansδmax, and the temperature range tanδ〉0.3 reached the maximum, 0.65 and 5～51℃ respectively at PMA/PDMS： 100 ： 100 and 2% TEOS. SEM shows that PDMS/PMA IPNs with PMA/PDMS=100： 100 shows double phase continuous properties. The PDMS/PMA IPNs can be used as damping materials under room temperature.