Crystallization Behavior of PET Modified by Pentanediol units

Pentanediol unit로 개질된 PET의 결정화 거동

  • Lee, Sun-Hui (Dept. of Chemical Engineering, Seoul City University) ;
  • Sim, Mi-Ja (Dept. of Chemical Engineering, Seoul City University) ;
  • Kim, Sang-Wook (Dept. of Chemical Engineering, Seoul City University)
  • 이선희 (서울시립대학교 화학공학과) ;
  • 심미자 (서울시립대학교 화학공학과) ;
  • 김상욱 (서울시립대학교 화학공학과)
  • Published : 1992.04.01


Polyethylene terephthalate(PET) is a well known commercial polymer widely available as fibre and as a major polymer with diverse applications. In this experiment, for the modification of PET, the pentanediol isomers, 1,5-pentanediol(1,5-PD) and neopentyl glycol(NPG), were introduced as third monomers. Crystallization rate decreased by the added NPG of PET modified by NPG units. In the case of PET modified by 1,5-PD, crystallization rate had been slightly increased at all temperatures until the 1,5-PD was added about 10 mol%. The decreased crystallization rate is thought to be due to branched from methyl group of neopentyl, which greatly retards the crystallization by growing onto the crystal surface of the diffused polymer chain.