Several polyurethanes were prepared from polyethylene adipate glycol, 4,4'-diphenylmethane diisocyanate, 1.4-butanedio1, and 3,3'-dichloro-4,4'-diaminodiphenylmethane. The temperature dependence of swelling and dynamic mechanical properties were determined. Analysis of the data shows that microphase
Microphase separation and properties of urethane elastomers
β Scribed by W. Nierzwicki; E. Wysocka
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 427 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
Several polyurethanes were prepared from poldethylene adipate) glycol, 4,l'diphenylmethane diisocyanate (MDI), and 1,4-butanediol. The overall NCO/OH ratio was allowed to vary from 0.94 to 1.21. Thus, the obtained elastomers differed in the amount of allophanate groups and perfection of microphase s
A new class of poly(amide-imide-urethane) thermoplastic elastomers based on two-step synthesis of 4,4@-methylene bis(4-phenylisocyanate) with di β erent polyols (PPG and PTMG) and trimellitic anhydride was synthesized. Both resulting polymers showed semicrystalline structures and were readily soluble