Poly(ethylene terephthalate-bisphenol S) (Copolyester BPS) and poly (ethylene terephthalate-isophthalate) (Copolyester IPA) were respectively chloromethylated and aminated with trimethylamine stepwise in order to impart an affinity for aciddyes to polyester. The melting points of copolyesters were decreased while the crystallization temperatures were increased with the mole percentage of the comonomer (Bis phenol S and dimethyl isophthalate) in the feed. It was found that the copolyester BPS was successfully chloromethylated with chloromethyl ether in the presence of zinc chloride. The nitrogen content of the copolyester BPS aminated with trimethylamine was increased with the mole percentage of the comonomer. The moisture regain of the modified copolyester BPS was significantly increased and the dyeability to acid dye (Acid Orange Ⅱ) was conspicously improved in proportion to the mole percentage of the comonomer.

폴리에스테르에 bisphenol S, isophthalate구조를 포함하는 copolyester BPS, copolyester IPA를 각각 chloromethylation하고 trimethylamine과 반응시켜 산성염료에 대한 친화력을 검토하였다. 중합체중 개질제 bisphenol S, dimethyl isophthalate의 몰 %가 증가할수록 copolyester의 융점은 감소하고 결정화온도는 증가하였다. copolyester BPS는 chloromethylether와 zinc chloride를 촉매로 사용하였을 때 chloromethylation이 잘 되었다. Trimethylamine과 반응시킨 copolyester BPS는 개질제의 몰 %가 증가할수록 질소함량이 증가하였다. 개질된 copolyester BPS는 흡습성이 상당량 증가하였고 산성염료 Acid Orange Ⅱ에 대한 염색성은 개질제의 몰% 증가에 따라 크게 증가하였다.