A study on the mechanical and morphological behavior of polyurethane-encapsulated cholesteric liquid crystal composite films
| Autor: | Emine Kemiklioglu, Onur Sayman, Uğur Kemiklioğlu |
|---|---|
| Přispěvatelé: | Faculty of Engineering, Manisa Celal Bayar University, Yunusemre, Manisa, Turkey, Department of Mechanical Engineering, Doğuş University, Acıb, adem, İstanbul, Turkey, Department of Mechanical Engineering, Dokuz Eylül University, Buca, İzmir, Turkey, 0-Belirlenecek |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
cholesteryl liquid crystals
Materials science Morphology (linguistics) Cholesteric liquid crystal polymer Composite number 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Liquid crystal morphology Composite material Polyurethane Tensile testing chemistry.chemical_classification integumentary system tensile test Liquid crystal membranes Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Membrane chemistry Ceramics and Composites 0210 nano-technology |
| Popis: | This study explores the preparation and mechanical behavior of free-standing polymer-dispersed liquid crystal (PDLC) film membranes. Polyurethane (PU) was used as a thermoplastic polymer matrix to form these free-standing film membranes. Cholesteryl oleyl carbonate (COC) and cholesteryl pelargonate were used as liquid crystals (LCs) with different molecular weights. PDLC membranes were produced by casting method after LCs and polymer were mixed in the tetrahydrofuran solvent at room temperature. These membranes were formed at different concentration ratios of polymer and LCs. The relationship among the phase separation, LCs and polymer contents as well as the LCs molecular weights was investigated. The morphological structures of these membranes were studied using scanning electron microscopy (SEM). SEM images exhibited that the shapes of LC droplets embedded in PU matrix were more uniform and smaller than those of the membranes which include LC with lower molecular weight. The mechanical properties of the PDLC membranes were determined by carrying out the tensile tests. It was found that the membranes which include COC LC were more flexible. Turkish Academy of Sciences (TUBA)Turkish Academy of Sciences The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This project was financially supported by the Turkish Academy of Sciences (TUBA). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|