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Novel bio-based thermoplastic poly(ether-urethane)s. Correlations between the structure, processing and properties
Abstract
The main purpose of this work was to analyze the effect of the number of unreacted isocyanate groups and the [NCO]/[OH] molar ratio during the chain extension of a prepolymer during the polymerization process on the structure, processing and selected properties of thermoplastic poly(ether-urethane)s. Three series of novel thermoplastic polyurethanes were obtained via a prepolymer route. Three prepolymers were synthesized from diisocyanate and bio-based polyol, which contained 6, 7 and 8% of unreacted isocyanate groups. The prepolymer chains were extended by using bio-based 1,4-butanediol with four different [NCO]/[OH] molar ratios. It was confirmed that the concentration of unreacted isocyanate groups in the prepolymer has an effect on the degree of the hard segment phase separation of poly(ether-urethane)s. It was also found that the melt flow index has a significant impact on the processing of polyurethanes which can be correlated to the chemical structure and dynamic mechanical properties of the polyurethanes.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
POLYMER
no. 160,
pages 1 - 10,
ISSN: 0032-3861 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Kasprzyk P., Datta J.: Novel bio-based thermoplastic poly(ether-urethane)s. Correlations between the structure, processing and properties// POLYMER. -Vol. 160, (2019), s.1-10
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.polymer.2018.11.032
- Verified by:
- Gdańsk University of Technology
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