Preparation of an acrylics-grafted polyester and its aqueous dispersion - Structural study of acrylics-grafted polyesters

Structural study of two grafted polyesters, which were different in mechani cal properties, was investigated by DMA, TEM, and high-resolution solid-sta te C-13- NMR. Using DMA and TEM, a separated phase larger than 100 nm was n ot found in the grafted polyesters. The main chain and the side chain seeme d miscible. Analysis of T(1 rho H)s and their distributions made the differ ence of microstructure in the grafted polyesters clear. P(EA-AA)-grafted po lyester, which was very brittle, had a separated phase in the grafted polye ster. The separated phase was estimated to be at a size of about 3 nm. On t he other hand, P(St-DEF-Manh)-grafted polyester, which was very ductile, ha d a homogeneous microstructure. The difference in the microstructures of th e grafted polyesters seemed to effect the mechanical properties of the graf ted polyesters. (C) 2000 John Wiley & Sons, Inc.