Modeling the structure of the hard domains in HMDI-based polyurethane elastomers
β Scribed by M. Nigar; S.N. Chvalun; J. Blackwell
- Book ID
- 101308107
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 109 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0323-7648
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π SIMILAR VOLUMES
From conformational analysis, we have determined the two lowest energy crystal structures for the hard segments of 4,4Π-diphenylmethane diisocyanate/1,4butanediol (MDI/BDO)-based polyurethane elastomer. Both crystal forms give prominent X-ray scattering at Ο³7.6 Γ . In one crystal form, (1), there is
Two series of segmented polyurethanes, one containing 50% soft segments and the other with 70% soft segments were synthesized. Chemical crosslinks were introduced through the hard segment in a controlled way. Chemical polyurethane networks were characterized by swelling. The effect of the degree of