| Autor: |
Park, LeeSoon, Ha, KiRyong, Lee, SoonNam |
| Zdroj: |
Molecular Crystals and Liquid Crystals; February 1997, Vol. 293 Issue: 1 p175-187, 13p |
| Abstrakt: |
AbstractLow molecular weight liquid crystals (LMWLCs), 4-[(4-bromoalkyloxy)-phenylazo]benzonitrile (AZO(n)) series were synthesized. Mesogenic monomers, 4-(4-propenoylalkyloxy)-4′-cyanobiphenyl (MCA) were synthesized and both homopolymer and copolymer with a methyl methacrylate (MMA) unit were prepared by free radical polymerization. Polymer/LMWLC composites (P/LCs) were prepared with LMWLC AZO(6) and AZO(8) and non-mesomorphic SCLCPs, PMCA(6)-3 and PMCA(8)-3, where (6) and (8) represent the number of methylene unit in the spacers of both LMWLC and SCLCP. It was observed that ΔTg(defined as Tgof polymer-Tgof P/LC) was smaller and ΔTNI(defined as TNIof LMWLC-TNIof P/LC) was larger, respectively in the case of P/LC samples with the same (6/6 and 8/8) spacer length. |
| Databáze: |
Supplemental Index |
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