Shape memory behavior of poly(methyl methacrylate)-graft-poly(ethylene glycol) copolymers

被引：34
|
作者：
Inomata, Katsuhiro [1 ]
Nakagawa, Keisuke [1 ]
Fukuda, Chieko [1 ]
Nakada, Yoshimi [1 ]
Sugimoto, Hideki [1 ]
Nakanishi, Eiji [1 ]
机构：
[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan
来源：
POLYMER | 2010年 / 51卷 / 03期
基金：
日本学术振兴会;
关键词：
Shape memory polymers; Graft copolymers; Entanglement; CHAIN CRYSTALLIZATION BEHAVIOR; AMORPHOUS MAIN-CHAIN; COMB POLYMER MELTS; GRAFT-COPOLYMERS; VISCOELASTIC PROPERTIES; IMPRESSION RECOVERY; STRESS-RELAXATION; SIDE-CHAINS; RHEOLOGY; POLYSTYRENES;
D O I：
10.1016/j.polymer.2009.12.021
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This paper describes a shape memory behavior of graft copolymers poly(methyl methacrylate)-graft-poly(ethylene glycol) (PMMA-g-PEG). In shape memory test, the sample was deformed from its original shape to a temporary shape above glass transition temperature (T,), cooled below T. to fix the temporary shape, and subsequently heated above T. for spontaneous recovery to the original shape. By grafting PEG onto PMMA backbone, shape memory ability was drastically enhanced than PMMA homopolyrner. The shape recovery ratio was decreased with the increase in the shape deformation temperature. With considering a good miscibility of backbone and side chain in PMMA-g-PEG, this shape memory ability may be related to a physically cross-linked network structure by chain entanglement of the comb-like graft copolymer. Stress relaxation measurements were investigated in order to confirm the effect of the graft chains on the shape memory behavior. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：793 / 798
页数：6
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