Journal
POLYMER INTERNATIONAL
Volume 54, Issue 5, Pages 854-859Publisher
WILEY
DOI: 10.1002/pi.1785
Keywords
polyurethane; shape memory; thermomechanical properties; shape memory behavior; mechanical properties; crosslinked
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A series of shape memory polyurethanes (SMPUs) was prepared from polycaprolactone diol (PCL) 4000, 1,4-butanediol (BDO), dimethylol propionic acid (DMPA), triethylamine, and 4,4'-diphenylmethane diisocyanate (MDI), to which excess MDI or glycerin were added to obtain crosslinked shape memory polyurethanes. Their mechanical, thermomechanical, thermal and shape memory properties were investigated by using differential scanning calorimetry (DSC), Fourier-transform (FTIR) spectroscopy, dynamic mechanical analysis (DMA) and tensile testing. The results showed that crosslinked SMPUs have better thermal and thermomechanical properties than those prepared from linear polyurethanes and display good shape memory effects. (c) 2005 Society of Chemical Industry.
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