Sequence Effects on Properties of the Poly(p-phenylene terephthalamide)-based Macroinitiators and their Comb-like Copolymers Grafted by Polystyrene Side Chains
文献类型：期刊论文
| 作者 | Du, Shuming; Zhang, Jie; Guan, Yan; Wan, Xinhua |
| 刊名 | AUSTRALIAN JOURNAL OF CHEMISTRY
 |
| 出版日期 | 2014 |
| 卷号 | 67期号:1页码:39-48 |
| ISSN号 | 0004-9425 |
| DOI | 10.1071/CH13291 |
| 英文摘要 | Two poly(p-phenylene terephthalamide) (PPTA)-based macroinitiators with random and alternate sequences, i.e. poly(p-phenylene terephthalamide)-ran-poly[p-phenylene (2,2,6,6-tetramethylpiperidinyl-1-oxy)terephthalamide)] (CPPTA-ran) and poly(p-phenylene terephthalamide)-alt-poly[p-phenylene (2,2,6,6-tetramethylpiperidinyl-1-oxy)terephthalamide)] (CPPTA-alt), were prepared via copolycondensation of terephthaloyl chloride, 2,2,6,6-tetramethylpiperidinyl-1-oxy (TEMPO)-functionalized terephthaloyl chloride, and p-phenylenediamine. The graft copolymers consisting of rigid PPTA backbones and polystyrene side chains were obtained by nitroxide-mediated radical polymerization. Both macroinitiators and graft copolymers were characterized by thermal gravimetric analysis, differential scanning calorimetry, wide-angle X-ray diffraction, and polarized optical microscopy. The regular incorporation of the TEMPO-containing co-unit gives rise to remarkable effects on the thermal stability, lyotropic liquid crystallinity, and macromolecular packing in bulk. CPPTA-alt shows better thermal stability and more ordered intermolecular structure than CPPTA-ran. The former generates a nematic phase at a concentration of 18wt-% in concentrated sulfuric acid, whereas the latter does so at a concentration of 12wt-%. For the graft copolymers, the alternative main chains exhibit sharper diffraction than the random ones. However, the sequence change exerts no discernible effect on other properties. |
| 语种 | 英语 |
| WOS记录号 | WOS:000329339700005 |
| 出版者 | CSIRO PUBLISHING |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/52659]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wan, Xinhua |
| 作者单位 | Peking Univ, Coll Chem & Mol Engn, Minist Educ, Beijing Natl Lab Mol Sci,Key Lab Polymer Chem & P, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Shuming,Zhang, Jie,Guan, Yan,et al. Sequence Effects on Properties of the Poly(p-phenylene terephthalamide)-based Macroinitiators and their Comb-like Copolymers Grafted by Polystyrene Side Chains[J]. AUSTRALIAN JOURNAL OF CHEMISTRY,2014,67(1):39-48. |
| APA | Du, Shuming,Zhang, Jie,Guan, Yan,&Wan, Xinhua.(2014).Sequence Effects on Properties of the Poly(p-phenylene terephthalamide)-based Macroinitiators and their Comb-like Copolymers Grafted by Polystyrene Side Chains.AUSTRALIAN JOURNAL OF CHEMISTRY,67(1),39-48. |
| MLA | Du, Shuming,et al."Sequence Effects on Properties of the Poly(p-phenylene terephthalamide)-based Macroinitiators and their Comb-like Copolymers Grafted by Polystyrene Side Chains".AUSTRALIAN JOURNAL OF CHEMISTRY 67.1(2014):39-48. |
入库方式： OAI收割
来源：化学研究所
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