Tailoring the physical properties of non-isocyanate polyurethanes by introducing secondary amino groups along their main chain
Authors:
- Izabela Łukaszewska,
- Sebastian Lalik,
- Artur Bukowczan,
- Monika Marzec,
- Krzysztof Pielichowski,
- Konstantinos N. Raftopoulos
Abstract
A series of linear non-isocyanate polyhydroxyurethanes (NIPUs) were synthesized by aminolysis of a PPO bis-cyclic carbonate with two diamines, one of which (triethylenetetramine, TETA) contains non-reacting secondary amino groups. Thus, varying the composition of the diamine component modulates the density of proton donors. Fourier Transform Infrared Spectroscopy (FTIR) showed that with increasing TETA content in the amine components (20–100 wt%) carbonyl groups tend to form progressively more double hydrogen bonds (HBs). Interestingly, the system without this amine deviates from the trend. In the whole composition range, a higher amount of double HBs correlates monotonously with reduced molecular mobility as observed by differential scanning calorimetry (DSC), dielectric relaxation spectroscopy (DRS), and dynamic mechanical analysis (DMA). It also correlates with the mechanical properties of studied NIPUs which range at room temperature from a viscous liquid to a dimensionally stable, flexible, and durable elastomer, depending on the density of double hydrogen-bonded carbonyls. Hence, the herein proposed approach allows for tailoring thermomechanical properties of NIPUs by modulating density of double hydrogen-bonded carbonyls.
- Record ID
- CUT42ed3c544ba6431ba62b5673d23ed915
- Publication categories
- ;
- Author
- Journal series
- Journal of Molecular Liquids, ISSN 0167-7322, e-ISSN 1873-3166
- Issue year
- 2023
- Vol
- 391
- No
- Pt. A
- Pages
- [1-12]
- Article number
- 123263
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 11-12; Bibliografia (liczba pozycji) - 77; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 391, Pt. A
- Substantive notes
- Supplementary data to this article can be found at https://doi.org/10.1016/j.molliq.2023.123263
- Keywords in English
- non-isocyanate polyurethanes, hydrogen bonding, molecular mobility
- ASJC Classification
- ; ; ; ; ;
- DOI
- DOI:10.1016/j.molliq.2023.123263 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S016773222302069X Opening in a new tab
- Related project
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Score source
- journalList
- Score
- Publication indicators
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT42ed3c544ba6431ba62b5673d23ed915/
- URN
urn:pkr-prod:CUT42ed3c544ba6431ba62b5673d23ed915
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