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Open Chemistry

formerly Central European Journal of Chemistry


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Volume 11, Issue 12

Issues

Volume 13 (2015)

Shape memory polyurethanes based on recycled polyvinyl butyral. I. Synthesis and morphology

Tsvetomir Tsonev / Michael Herzog / Sanchi Nenkova
Published Online: 2013-09-26 | DOI: https://doi.org/10.2478/s11532-013-0331-3

Abstract

Shape memory polyurethanes (SMPUs) were synthesized by 4,4′-diphenylmethane diisocyanate (MDI), hexane-1,6-diol (HD), polypropylene glycol (PPG), and recycled polyvinyl butyral (PVB). Dynamic mechanical analysis, differential scanning calorimetry and Fourier transformation infrared attenuated total reflection spectroscopy was used to characterize the poly (vinylbutyral-urethanes). Micro-phase domain separation of hard and soft segments and phase inversion were investigated. Increasing the hard segment content, i.e., average hard segment molecular weight, leads to an increase in the degree of micro-phase separation, hard domain order and crystallinity. The crystalline hard segment structures combined with the elastic nature of soft segment matrix provide enough physical and chemical crosslinks to have shape memory effect.

Keywords: Polyvinyl butyral; Shape memory; Polyurethanes; Thermal analysis; IR spectroscopy

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About the article

Published Online: 2013-09-26

Published in Print: 2013-12-01


Citation Information: Open Chemistry, Volume 11, Issue 12, Pages 2058–2065, ISSN (Online) 2391-5420, DOI: https://doi.org/10.2478/s11532-013-0331-3.

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© 2013 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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