Liquid crystalline polyurethanes modified by Trisilanolisobutyl-POSS
Authors:
- Artur Bukowczan,
- Konstantinos N. Raftopoulos,
- Maciej Czajkowski,
- Ewa Szefer,
- Edyta Hebda,
- Krzysztof Pielichowski
Abstract
A series of liquid crystalline polyurethanes based on 4,4′-bis(hydroxyhexoxy)biphenyl moieties and modified by Trisilanolisobutyl-POSS (TRIS-POSS) was synthesized via a polyaddition reaction. ATR-FTIR confirmed introduction of POSS moieties into the macrochain. Formation of liquid crystalline phases along with higher melting and crystallization temperatures due to the addition of the POSS moieties has been observed by Differential Scanning Calorimetry (DSC) and Polarized Optic Microscopy (POM). The influence of the POSS on the improvement of thermal stability and char residue after degradation is also discussed. Influence of the POSS particles on glass transition was found to be relevant for high mesogenic unit load. Morphological investigations by Scanning Electron Microscopy showed different distribution of the POSS nanoparticles for each examined matrix and absence of POSS originated agglomerates which was also confirmed by X-ray diffraction technique. Reinforcement effect of the POSS on mechanical properties was also investigated. Mechanically induced anisotropy was hypothesized to be one of the factor responsible for improved tensile strength at high strain.
- Record ID
- CUT00f5acd4f8ed4ef4b856ca4d7a69d20c
- Publication categories
- ;
- Author
- Journal series
- Journal of Molecular Liquids, ISSN 0167-7322, e-ISSN 1873-3166
- Issue year
- 2022
- Vol
- 348
- Pages
- [1-12]
- Article number
- 118069
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 11-12; Bibliografia (liczba pozycji) - 59; Oznaczenie streszczenia - Abstr.; Data udostępnienia on-line - 2021-11-11; Numeracja w czasopiśmie - Vol. 348
- Keywords in English
- liquid crystalline polyurethanes, POSS, nanoparticles, glass transition, crystallization
- ASJC Classification
- ; ; ; ; ;
- DOI
- DOI:10.1016/j.molliq.2021.118069 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S016773222102794X Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT00f5acd4f8ed4ef4b856ca4d7a69d20c/
- URN
urn:pkr-prod:CUT00f5acd4f8ed4ef4b856ca4d7a69d20c
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.