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1999 | 95 | 4 | 677-682
Article title

Free Volume Study on Three Types of Shape Memory Polymers by Positron Annihilation

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EN
Abstracts
EN
Temperature dependence of nanoscopic environment of shape memory polymers such as polynorbornene (T_{g}≈313 K), polyurethane (T_{g}≈321 K=dynamic viscoelasticity, destruction of hydrogen bond ≈353 K) and styrene-butadiene copolymer (T_{m}=333 K) is observed in terms of free volume parameters - average size, numerical concentration and size distribution - estimated from positronium lifetime measurement, and mechanisms of their shape recoveries are discussed at a molecular level.
Keywords
EN
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Year
Volume
95
Issue
4
Pages
677-682
Physical description
Dates
published
1999-04
Contributors
author
  • Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
author
  • Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
author
  • Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
References
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bwmeta1.element.bwnjournal-article-appv95z441kz
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