Poly(ethylene terephthalate)/clay nanocomposites based on aminododecanoic acid-modified clay: effect of compatibilizer reactivity on clay dispersion

• Published in: Journal of nanoscience and nanotechnology Vol. 6; no. 12; p. 3981
• Main Authors: Hao, Jiyuan, Lu, Xuehong, Lau, Soo Khim, Liu, Songlin, Chua, Yang Choo
• Format: Journal Article
• Language: English
• Published: United States 01-12-2006
• Subjects: Aluminum Silicates - chemistry; Clay; Colloids - chemistry; Crystallization - methods; Lauric Acids - chemistry; Macromolecular Substances - chemistry; Materials Testing; Molecular Conformation; Nanostructures - chemistry; Nanostructures - ultrastructure; Nanotechnology - methods; Particle Size; Polyethylene Glycols - chemistry; Polyethylene Terephthalates; Surface Properties
• ISSN: 1533-4880
• 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.