Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Hydrophilic Modification of PET by Using Block Copolymer -Molecular Structure and Hydrophilicity of PET-PEG Block Copolymers-

블록 공중합체를 이용한 PET의 친수화 연구 - PET-PEG 블록공중합체의 구조에 따른 친수성의 비교 -

  • 우상원 (한양대학교 공과대학 섬유공학과, 신소재공정공학원) ;
  • 조창기 (한양대학교 공과대학 섬유공학과, 신소재공정공학원)
  • Published : 1999.03.01

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Abstract

Multi-block copolymers of poly(ethylene terephthalate) (PET) and poly(ethylene glycol) (PEG) were synthesized. Similarly, triblock copolymers of PET and poly(ethylene glycol) methyl ether (MPEG) were synthesized. PEG and MPEG of various molecular weights were used. Obtained block copolymers were made into film, and conditioned at 65% RH at $25^{\circ}C$ after vacuum drying. Water contact angle measurement indicated the enrichment of PET domain on the film surface after vacuum drying, and the enrichment of PEG domain on the film surface after conditioning. The hydrophilicity of the film increased as the molecular weight of PEG block increased. Also, the surface energy increased as the molecular weight of PEG increased, and this increase was mainly due to the increase in the polar component of surface energy. In spite of lower PEG contents, triblock copolymers showed relatively good hydrophilicity.

Keywords

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