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KMID : 1059519900340020197
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Journal of the Korean Chemical Society
1990 Volume.34 No. 2 p.197 ~ p.202
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Synthesis and Physical Properties of Biocompatible and Biodegradable Polypeptide Copolymers. (1) Synthesis of Poly(ethylene glycol) grafted Polypeptides
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Kang Inn-Kyu
Kwon Dae-Ryong
Cho Chong-Su
Sung Yong-Kiel
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Abstract
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Polyethylene glycol (PEG) grafted poly γ-benzyl L-glutamate (PBLG) were prepared from esterification or substitution reaction of PBLG with PEG having hydroxyl group at one end or primary amino groups at both ends. The viscosity of these polymer solution was decreased with decrease of polymer concentration. But in more dilute solution the viscosity was increased with decrease of polymer concentration. PEG-grafted PBLG polymers showed smaller water contact angles than PBLG homopolymer, and the water contact angles of the surface of PEG-grafted PBLG polymers were largely dropped by reacting with aminoethanol, resulting in hydrogel surfaces.
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