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'Spider-like' POSS in NIPU webs: enhanced thermal stability and unique swelling behavior.
- Source :
-
Journal of Polymer Research . Dec2023, Vol. 30 Issue 12, p1-16. 16p. - Publication Year :
- 2023
-
Abstract
- PEO-based non-isocyanate polyhydroxyurethane (NIPU, PHU) networks physically modified with octa(3-hydroxy-3-methylbutyldimethylsiloxy)POSS (8OHPOSS) were synthesized via one-pot one-step approach. POSS was introduced into the polymer matrix in the amount of 1–10 wt%. Polar hydroxyls on the vertex groups of POSS allowed for uniform dispersion even up to high loadings (10 wt%). Composites exhibit enhanced thermal stability in comparison to the pristine matrix. FTIR analysis confirmed that POSS strengthens the hydrogen bonding in the material. Upon POSS introduction, plasticization was observed with a peculiar trend change at POSS loadings over 5 wt%. Glass transition temperature of highly crystalline 8OHPOSS was measured and reported to be at around 3 °C. NIPUs at hand exhibit high water absorption (around 200 wt%) typical for hydrogels. Swelling studies show that 8OHPOSS enhances PHUs hydrogels absorption capacity in phosphate-buffered saline (PBS). Higher absorption capacity in PBS solution in comparison to distilled water is an uncommon phenomenon in hydrogels. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10229760
- Volume :
- 30
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Polymer Research
- Publication Type :
- Academic Journal
- Accession number :
- 174405923
- Full Text :
- https://doi.org/10.1007/s10965-023-03834-z