Shape-memory polyurethanes (PUs) were synthesized by 4,4 -diphenylmethane diisocyanate (MDI), 1,4-butanediol (BD), and poly(tetramethyl oxide)glycol (PTMO). The morphology of PUs was studied using DSC, DMA, and TEM. The results indicated that the PUs would show different morphology by changing the m
Polyether-based thermoplastic polyurethanes. I. Effect of the hard-segment content
β Scribed by R. J. Zdrahala; R. M. Gerkin; S. L. Hager; F. E. Critchfield
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 419 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0021-8995
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Polyurethanes based on PPG 2000 with variable concentrations of TDI and TMP were prepared and used for sorption studies, employing homologous series of hydrocarbons such as benzene, toluene and xylene. The sorption was observed to be non-Fickian in nature. The solubility parameter of the polyurethan
A series of polyurethane compositions with soft and hard segments were prepared, and the damping and mechanical properties of these materials were studied. The damping of polyurethane was decreased and shifted to the higher temperature with the content of butanediol (BD) used as a chain extender. Th
## Abstract Two series of poly(ether urethane)s and one series of poly(ester urethane)s were synthesized, containing, respectively, poly(oxytetramethylene) diol (PTMO) of __M__~__n__~ = 1000 and 2000 and poly(Ξ΅βcaprolactone) diol of __M__~__n__~ = 2000 as soft segments. In each series the same hard