Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Effect of Terephthalic Acid Esters on the Polycondensation Reaction of Bis(2-hydroxyethyl) Terephthalate

비스(2-히드록시에틸) 테레프탈레이트의 축합중합반응에 미치는 테레프탈산 에스테르의 영향

  • 하완식 (서울대학교 공과대학 섬유고분자공학과) ;
  • 인성남 (서울대학교 공과대학 섬유고분자공학과, 한국과학기술연구원 고분자연구부)
  • Published : 1996.06.01

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Abstract

The effect of several kinds of terephthalic acid esters (di-o-chlorophenyl terephthalate, di-m-chlorophenyl terephthalate, diphenylethyl terephthalate, dimethyl terephthalate, bis (2-hy-droxyethyl) terephthalate (BHET), and diphenyl terephthalate (DPI)) on the polycondensation reaction of BHET was investigated. Terephthalic acid esters were added at the moment when thermal degradation started. The highest increase of molecular weight was observed when DPT was used. With other terephthalic acid esters the molecular weights were rather decreased or were similar to that of PET polycondensated without any added terephthalic acid esters. It was identified that the rate constants of ester interchange reactions of terephthalic acid esters and the reactivates of byproducts during polycondensation had a marked influence on the polycondensstion reaction of BHET. The results of GPC analysis suggested that the molecular weight distributions of PET samples should be affected by the addition of terephthalic acid esters.

Keywords

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