Synthesis of AB2 Star-shaped Miktoarms Copolymers and Their Crystallization Behavior

Chem. J. Chinese Universities

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Synthesis of AB₂ Star-shaped Miktoarms Copolymers and Their Crystallization Behavior

WANG Kang-Cheng¹, HUANG Wei²*, ZHOU Yong-Feng², YAN De-Yue²*

1. Department of Chemistry, Huzhou Teacher College, Huzhou 313000, China;
2. College of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240, China

Received:2007-02-25 Revised:1900-01-01 Online:2007-07-10 Published:2007-07-10
Contact: HUANG Wei

Abstract

Abstract:

A small molecule (GMS-SA₂) with one alkyl chain and two terminal carboxyl groups was synthesized successfully via the reaction of glyceryl monostearate with excessive succinic anhydride. Then, the small molecule was used as a coupling agent to condensate with polyethylene glycols (PEG) with different molecular weights or polyethylene glycol monomethyl ether (PEGm) in the presence of stannous octoate as the catalyst and diphenyl ether the as azeotropic agent to remove water. Thus, the AB₂ star-shaped miktoarms copolymers were obtained successfully, and were characterized via ¹H NMR, DSC, GPC, XRD, FTIR and micropolariscope, etc. DSC and XRD measurements indicate that the crystallizing temperature and the melting temperature of the AB₂ star-shaped miktoarms copolymers were different from those of the corresponding linear PEGs because the existing of GMS-SA₂ altered its crystallizing velocity and the perfect degree of crystal. It is very important to control the crystal shape of the star-shaped copolymers through introducing the miktoarms into the copolymers and changing its content in copolymers.

Key words: Star-shaped copolymer, Miktoarms, Glyceryl monostearate, PEG, Crystallization

CLC Number:

O633.1

TrendMD:

WANG Kang-Cheng¹, HUANG Wei²*, ZHOU Yong-Feng², YAN De-Yue²*. Synthesis of AB₂ Star-shaped Miktoarms Copolymers and Their Crystallization Behavior[J]. Chem. J. Chinese Universities, doi: .

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Synthesis of AB₂ Star-shaped Miktoarms Copolymers and Their Crystallization Behavior

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