Hao Jiyuan, Lu Xuehong, Lau Soo Khim, Liu Songlin, Chua Yang Choo
School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
J Nanosci Nanotechnol. 2006 Dec;6(12):3981-4. doi: 10.1166/jnn.2006.653.
Poly(ethylene terephthalate) (PET)/Clay hybrids were prepared via in situ polymerization, in which the clay was modified with 12-aminododecanoic acid (ADA). Three types of bifunctional compounds were introduced into the system, respectively, as compatibilizers between PET and ADA-Clay. The three compounds contain 1 degree, 2 degree, and 3 degree amino groups, respectively, that could form ionic complex with carboxylic acid of ADA. They also contain an ester group that could react with PET chains through transesterification. The results show that adding the compound with 3 degree amino group can improve clay dispersion significantly, while the ones with 1 degree and 2 degree amino groups are not effective compatibilizers. The possible underlying mechanism is discussed.
通过原位聚合制备了聚对苯二甲酸乙二酯（PET）/粘土杂化材料，其中粘土用12-氨基十二烷酸（ADA）进行了改性。分别向体系中引入了三种双功能化合物，作为PET与ADA-粘土之间的增容剂。这三种化合物分别含有伯氨基、仲氨基和叔氨基，它们可以与ADA的羧酸形成离子络合物。它们还含有一个酯基，该酯基可以通过酯交换反应与PET链发生反应。结果表明，添加含叔氨基的化合物可以显著改善粘土的分散性，而含伯氨基和仲氨基的化合物不是有效的增容剂。文中讨论了可能的潜在机理。
