Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Preparation of PLA/PEG Block Copolymer via Melt Blend

용융블렌드를 이용한 PLA/PEG 블록 공중합체의 제조

  • Yoon, Cheol-Soo (Department of Textile Engineering, Dankook University) ;
  • Ji, Dong-Sun (Department of Textile Engineering, Dankook University)
  • 윤철수 (단국대학교 섬유공학과) ;
  • 지동선 (단국대학교 섬유공학과)
  • Published : 2006.10.31
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Abstract

PLA/PEG blends composed of poly(lactic acid) (PLA) and poly (ethylene glycol) (PEG) were prepared via melt blending for bioabsorbable filament sutures. The effects of blend composition and blending time on the alcoholysis or esterification in the PLA/PEG blends were investigated. Their properties due to PLA/PEG block copolymer were characterized by $^1$H-NMR, GPC, and DSC analyses. Consequently, PLA/PEG block copolymers were formed during the melt blending by alcoholysis or esterification from a new peak due to -CH$_2$(c') appeared at 4.3 ppm. In addition, the molecular weights of the blends processed in Haake Rheomix for 10$\sim$30 minutes at 220 $^{\circ}C$ under screw speed 20 rpm decreased with increasing PEG contents and blending time. Their thermal properties such as melting temperature and heat of fusion due to PLA in the blends decreased with increasing PEG contents and blending time. However, their melting temperature and heat of fusion due to PEG increased with an increase of PEG content under constant blending time.

Keywords

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