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  • 1
    ISSN: 0887-624X
    Keywords: interpenetrating polymer networks ; poly(urethane carbonate) ; polyvinyl pyridine ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Simultaneous interpenetrating polymer networks (IPN's), pseudo IPN's, and liner blends of aliphatic poly(carbonate-urethane) (PCU) and polyvinyl pyridine (PVP) have been prepared and characterized by DSC, DMA, and TEM. The full IPN's of PCU and PVP had a single phase morphology only above 50 wt % PCU, as determined by both DSC and DMA and confirmed by transmission electron microscopy (TEM). However, in both pseudo IPN's of PCU and PVP and in their linear blends there exist multiple glass transitions and melting points seen by DSC and DMA indicating phase incompatibility. The full IPN's exhibited superior ultimate mechanical properties and solvent resistance as compared to the pseudo IPN's, liner blends, and the pure crosslinked PCU and PVP networks.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    ISSN: 0887-624X
    Keywords: interpenetrating polymer networks ; polycarbonate-urethane ; polybutadiene ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Interpenetrating polymer networks (IPN's), pseudo IPN's and linear blends of urethane-containing aliphatic polycarbonate (PCU) and polybutadiene (PB) have been prepared and characterized. The simultaneous full IPN's of PCU and PB over the whole composition range (15-85% by weight PCU) exhibit a single phase morphology even though the linear chain blends are completely immiscible, as determined by DSC and confirmed by transmission electron microscopy (TEM). However, in both pseudo IPN's of PCU and PB there appeared multiple (melting and glass) transitions in DSC measurements and phase separation was observed by TEM. © 1992 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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