Eco-Friendly Ether and Ester-Urethane Prepolymer: Structure, Processing and Properties

This study concerns bio-based urethane prepolymers. The relationship between the chemical structure and the thermal and processing parameters of bio-based isocyanate-terminated ether and ester-urethane prepolymers was investigated. Bio-based prepolymers were obtained with the use of bio-monomers suc...

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Bibliographic Details
Published in:International journal of molecular sciences 2021-11, Vol.22 (22), p.12207
Main Authors: Niesiobędzka, Joanna, Głowińska, Ewa, Datta, Janusz
Format: Article
Language:English
Subjects:
bio-based diisocyanate
chemical structure
Climate change
Consumption
Cyanates
Diisocyanates
ester-urethane prepolymer
Esters - chemistry
Ether - chemistry
ether-urethane prepolymer
Ethyl carbamate
Fourier transforms
Infrared spectroscopy
Isocyanates
Molecular Weight
Natural resources
NMR
Nuclear magnetic resonance
Polyesters - chemical synthesis
Polyesters - chemistry
Polymerization
Polymers
Polymers - chemical synthesis
Polymers - chemistry
Polyols
Polyurethanes - chemical synthesis
Polyurethanes - chemistry
Prepolymers
Process parameters
processing properties
Rheological properties
Rheology
Surface Properties
thermal analysis
Thermal stability
Thermogravimetry
Viscosity
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Summary:This study concerns bio-based urethane prepolymers. The relationship between the chemical structure and the thermal and processing parameters of bio-based isocyanate-terminated ether and ester-urethane prepolymers was investigated. Bio-based prepolymers were obtained with the use of bio-monomers such as bio-based diisocyanate, bio-based polyether polyol or polyester polyols. In addition to their composition, the bio-based prepolymers were different in the content of iso-cyanate groups content (ca. 6 and 8%). The process of pre-polymerization and the obtained bio-based prepolymers were analyzed by determining the content of unreacted NCO groups, Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, thermogravimetry, and rheological measurements. The research conducted facilitated the evaluation of the properties and processability of urethane prepolymers based on natural components. The results indicate that a significant impact on the processability has the origin the polyol ingredient as well as the NCO content. The thermal stability of all of the prepolymers is similar. A prepolymer based on a poly-ether polyol is characterized by a lower viscosity at a lower temperature than the prepolymer based on a polyester polyol. The viscosity value depends on the NCO content.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms222212207