SYNTHESIS OF POLY(ETHYLENE TEREPHTHALATE-co-ETHYLENE ADIPATE) CATALYZED BY RARE EARTH ACETATES
乙酸稀土盐催化缩聚合成聚(对苯二甲酸乙二酯-co-己二酸乙二酯)

Rare earth (Nd,Y,La,Dy) acetates have been synthesized and used as single component catalysts for the polycondensation of dimethyl terephthalate,adipic acid and ethylene glycol first preparing aromatic/aliphatic copolyester are poly(ethylene terephthalate-co-ethylene adipate) (PETA) with high molecular weights.The copolyesters catalyzed by different rare earth acetates were characterized by means of 1H-NMR,DSC,SEC and mechanical testing.The compositions of the coplyesters calculated by the peak integrals of...