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

• Authors: Tsvetomir Tsonev , Michael Herzog , Sanchi Nenkova
• Languages of publication: EN

Abstracts

EN

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

EN

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

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2013
• Volume: 11
• Issue: 12
• Pages: 2058-2065

Dates

published

1 - 12 - 2013

online

26 - 9 - 2013

Contributors

author

Tsvetomir Tsonev

• University of Applied Sciences Wildau, 15745, Wildau, Germany

author

Michael Herzog

• University of Applied Sciences Wildau, 15745, Wildau, Germany

author

Sanchi Nenkova

• University of Chemical Technology and Metallurgy Sofia, 1756, Sofia, Bulgaria

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Identifiers

DOI

10.2478/s11532-013-0331-3