On the effect of heat and solvent exposure on the microstructure properties of auxetic foams: A preliminary study

被引：26
|
作者：
Gatt, Ruben [1 ]
Attard, Daphne [1 ]
Manicaro, Elaine [1 ]
Chetcuti, Elaine [1 ]
Grima, Joseph N. [1 ]
机构：
[1] Univ Malta, Dept Chem, Msida 2080, Malta
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2011年 / 248卷 / 01期
关键词：
acetone; auxetic foam; Poisson's ratios; polyurethane; solvent; temperature; NEGATIVE POISSON RATIOS; ALTERNATIVE EXPLANATION; DEFORMATION MECHANISMS; ELASTIC PROPERTIES; BEHAVIOR; TRANSITION; POLYMERS; MODEL; SIO2;
D O I：
10.1002/pssb.201083978
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The effect of elevated temperature and solvent exposure on the microstructure of auxetic polyurethane foams is investigated. It is shown that such effects result in an expansion of the auxetic foams accompanied by the removal of the highly convoluted features in the microstructure of auxetic foams with the result that such foams lose their auxetic characteristics. It is also shown that such changes do not occur if the foams are subjected to the high temperature or solvent exposure in a contained state which does not permit the expansion. This means that auxetic foams can still be used in such environments provided that the right precautions are taken (e.g. putting them in a cover thereby constraining them to retain their volume). (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：39 / 44
页数：6
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