Shape recovery and secondary-shape forming in polyurethane-shape memory polymer

被引：0

作者：

Tobushi, H. ^{[1
]}

Ejiri, Y. ^{[1
]}

Hayashi, S. ^{[2
]}

Miwa, N. ^{[3
]}

机构：

[1] Aichi Inst Technol, Dept Mech Engn, 1247 Yachigusa, Yakusa, Toyota 4700392, Japan

[2] DiAPLEX Co Ltd, Shibuya Ku, Tokyo 1500022, Japan

[3] Churyo Engn Co Ltd, Nakamura Ku, Nagoya, Aichi 4530862, Japan

来源：

ENGINEERING PLASTICITY AND ITS APPLICATIONS FROM NANOSCALE TO MACROSCALE, PTS 1 AND 2 | 2007年 / 340-341卷

关键词：

shape memory polymer; shape recovery; shape fixity; secondary-shape forming; polyurethane; strain-holding condition;

D O I：

10.4028/www.scientific.net/KEM.340-341.1217

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of the strain-holding conditions on shape recovery and secondary-shape forming was investigated. The results obtained are summarized as follows. (1) If strain is held at holding temperature T-h = T-g+20K in a short time, irrecoverable strain starts to appear at the holding time t(h)=0.5h and strain is not recovered at all at t(h)=8h. In the case of T-h = T-g+10K, irrecoverable strain appears in a short holding time if holding strain is large and the rate of secondary-shape forming S is 42% at t(h)=8h. (2) If strain of 50% is held at T-h = T-g+10K in a long time, strain becomes not to be recovered and S is 93% at t(h)=12h. In the case of T-h = T-g, the increasing rate of S increases if th is longer than 40h. If T-h is lower than T-g-10K for t(h)=72h, strain is recovered perfectly by heating and secondary-shape forming does not appear.

引用

页码：1217 / +

页数：2