Characterization of poly(L-lactic acid)-polyethylene glycol copolymers synthesized by melt copolymerization

Jing Che; Rongjie Yang

Characterization of poly(L-lactic acid)-polyethylene glycol copolymers synthesized by melt copolymerization

Jing Che, Rongjie Yang^*

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Prepolymers were prepared through a dehydration process from L-lactic acid. Poly(L-lactic acid)-polyethylene glycol(PLLA-PEGs) copolymers were prepared by the direct melt polymerization of prepolymer and polyethylene glycol using TSA/SnCl₂/Sn(Oct)₂ as catalyst. FT-IR and ¹H-NMR spectra show that the structures of copolymers are mainly PLLA-PEGs. DSC results show that the glass transition temperature, melting point and crystallinity of the copolymer are lower than those of neat PLLA. The optical rotation of L-lactic acid decreases during the polymerization. The rheological analysis shows that the tenacity of copolymer increases.

Original language	English
Pages (from-to)	155-158+163
Journal	Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering
Volume	28
Issue number	12
Publication status	Published - Dec 2012

Keywords

Copolymerization
Melt polymerization
Poly(L-lactic acid)
Polyethylene glycol

Cite this

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abstract = "Prepolymers were prepared through a dehydration process from L-lactic acid. Poly(L-lactic acid)-polyethylene glycol(PLLA-PEGs) copolymers were prepared by the direct melt polymerization of prepolymer and polyethylene glycol using TSA/SnCl2/Sn(Oct)2 as catalyst. FT-IR and 1H-NMR spectra show that the structures of copolymers are mainly PLLA-PEGs. DSC results show that the glass transition temperature, melting point and crystallinity of the copolymer are lower than those of neat PLLA. The optical rotation of L-lactic acid decreases during the polymerization. The rheological analysis shows that the tenacity of copolymer increases.",

keywords = "Copolymerization, Melt polymerization, Poly(L-lactic acid), Polyethylene glycol",

author = "Jing Che and Rongjie Yang",

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T1 - Characterization of poly(L-lactic acid)-polyethylene glycol copolymers synthesized by melt copolymerization

AU - Che, Jing

AU - Yang, Rongjie

PY - 2012/12

Y1 - 2012/12

N2 - Prepolymers were prepared through a dehydration process from L-lactic acid. Poly(L-lactic acid)-polyethylene glycol(PLLA-PEGs) copolymers were prepared by the direct melt polymerization of prepolymer and polyethylene glycol using TSA/SnCl2/Sn(Oct)2 as catalyst. FT-IR and 1H-NMR spectra show that the structures of copolymers are mainly PLLA-PEGs. DSC results show that the glass transition temperature, melting point and crystallinity of the copolymer are lower than those of neat PLLA. The optical rotation of L-lactic acid decreases during the polymerization. The rheological analysis shows that the tenacity of copolymer increases.

AB - Prepolymers were prepared through a dehydration process from L-lactic acid. Poly(L-lactic acid)-polyethylene glycol(PLLA-PEGs) copolymers were prepared by the direct melt polymerization of prepolymer and polyethylene glycol using TSA/SnCl2/Sn(Oct)2 as catalyst. FT-IR and 1H-NMR spectra show that the structures of copolymers are mainly PLLA-PEGs. DSC results show that the glass transition temperature, melting point and crystallinity of the copolymer are lower than those of neat PLLA. The optical rotation of L-lactic acid decreases during the polymerization. The rheological analysis shows that the tenacity of copolymer increases.

KW - Copolymerization

KW - Melt polymerization

KW - Poly(L-lactic acid)

KW - Polyethylene glycol

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M3 - Article

AN - SCOPUS:84872583247

SN - 1000-7555

VL - 28

SP - 155-158+163

JO - Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering

JF - Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering

IS - 12

ER -

Characterization of poly(L-lactic acid)-polyethylene glycol copolymers synthesized by melt copolymerization

Abstract

Keywords

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