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Structure of polyurethane elastomers. X-ray diffraction and conformational analysis of MDI-propandiol and MDI-ethylene glycol hard segments

โœ Scribed by J. Blackwell; M.R. Nagarajan; T.B. Hoitink

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
726 KB
Volume
22
Category
Article
ISSN
0032-3861

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Conformational analysis of the crystal s
Conformational analysis of the crystal structure for MDI/BDO hard segments of polyurethane elastomers
โœ Chris W. Patterson; David Hanson; Antonio Redondo; Stephen L. Scott; Neil Henson ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 354 KB ๐Ÿ‘ 1 views

From conformational analysis, we have determined the two lowest energy crystal structures for the hard segments of 4,4ะˆ-diphenylmethane diisocyanate/1,4butanediol (MDI/BDO)-based polyurethane elastomer. Both crystal forms give prominent X-ray scattering at ฯณ7.6 ร…. In one crystal form, (1), there is