Abstract
Interfacial structures of syndiotactic poly(methyl methacrylate) (st-PMMA)/alumina nanoparticles mixtures prepared from tetrahydrofuran (THF) suspension were investigated by X-ray diffraction and differential scanning calorimetry. Whereas an amorphous structure, containing trans-rich PMMA chains, was formed in the film prepared by annealing the mixed sample, an amorphous structure, containing gauche-rich PMMA chains, was formed in the film prepared from THF suspension of the mixed sample, and these two amorphous structures were different from that in the bulk sample without alumina. The amorphous structure containing gauche-rich chains changed to that containing trans-rich chains by heating the THF sample without alumina at the temperature higher than the glass transition temperature of st-PMMA. However, the interfacial interaction between st-PMMA and alumina prevented the change of the amorphous structures.
