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Unusual Phase Behavior of a Mesogen-Jacketed Liquid Crystalline Polymer Synthesized by Atom Transfer Radical Polymerization
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhao, Yongfeng Fan, Xinghe Wan, Xinhua Chen, Xiaofang Wang, ‡. Liang-Shi Dong, And Xia Zhou, Qi-Feng |
| Copyright Year | 2006 |
| Abstract | A series of mesogen-jacketed liquid crystalline polymers, poly{2,5-bis[(4-butoxyphenyl)oxycarbonyl]styrenes} (PBPCS), with a wide range of molecular weights (Mn = 1.24 × 104−35.6 × 104) and narrow molecular weight distributions (Mw/Mn ≤ 1.18) have been synthesized by atom transfer radical polymerization. The resulting polymers have been investigated by a combination of techniques including differential scanning calorimetry, polarized optical microscopy, and X-ray scattering. The samples with Mn ≤ 2.42 × 104 are isotropic. The samples with Mn ≥ 3.36 × 104 display a thermodynamically stable isotropic phase at lower temperature and a liquid crystalline (LC) phase at higher temperature. The phase behavior shows a phenomenon quite similar to the reentrant isotropic phase. These transitions are correlated with the rheological properties measured as a function of temperature. The rheological behavior of the polymer in the isotropic phase and in the LC phase has been studied as well. On the basis of these experim... |
| Starting Page | 948 |
| Ending Page | 956 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/ma0514370 |
| Alternate Webpage(s) | http://www.chem.pku.edu.cn/wanxh/pdf/06-08.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/ma0514370 |
| Volume Number | 39 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
