Exploration of Properties of Polyester Catalyzed by Different Al-Si Compounds

Different Al-Si compounds and Sb2O3 catalysts for polyester polycondensation were studied.Also the properties of polyesters were characterized by means of GPC,chromatic value,DSC and TG.The results showed that molecular weight and molecular weight distribution of polyester catalyzed by Al-Si compounds(quality ratio is equal to 4:1) was close to those of catalyzed by Sb2O3 and L value of polyester catalyzed by Al-Si compounds was higher than by Sb2O3,b value of polyester catalyzed by Al-Si compounds was lower than that of polyester catalyzed by Sb2O3,glass transition temperature(Tg) of polyester catalyzed by Al-Si compounds were a little lower than that of polyester catalyzed by Sb2O3,caystallization ability of polyester catalyzed by Al-Si compounds were stronger than that of polyester catalyzed by Sb2O3,thermal performance of polyester catalyzed by Al-Si compounds were similar to polyester catalyzed by Sb2O3.