Packing mode and conformational transition of alkyl side chains in N-alkylated poly(p-benzamide) comb-like polymer
文献类型：期刊论文
| 作者 | Shi, HF; Ying, Z; Zhang, XQ; Yong, Z; Xu, YZ; Zhou, SR; Wang, DJ; Han, CC; Xu, DF |
| 刊名 | POLYMER
 |
| 出版日期 | 2004-08-19 |
| 卷号 | 45期号:18页码:6299-6307 |
| 关键词 | N-alkylated Poly(P-benzamide) Crystallization Conformational Transition |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2004.07.005 |
| 英文摘要 | A series of rigid-rod poly(p-benzamide) polymers (PBA) with different length of flexible alkyl side chains, denoted as PBA(n)Cs, have been prepared by N-alkylation method. The alkyl side chain lengths varied from decyl (n = 10) to octadecyl (n = 18), with an interval of two carbon atoms. The packing mode and conformational transition of the alkyl side chains of the prepared PBA derivatives were characterized by wide-angle X-ray diffraction (WAXD), differential scanning calorimertry (DSC), and Fourier transform infrared spectroscopy (FTIR). WAXD results revealed that the derivatives form layered structure in which the distance between the backbones depends on the length of alkyl side chains. DSC studies indicated that melting transition temperature of PBA(n)Cs increases accordingly with increasing the alkyl chain length of the substituents. Meanwhile, DSC results proved that as the carbon atom number of the side group exceeds 14, alkyl side chains in PBA(n)Cs tend to crystallize FTIR spectroscopic investigation showed that the all-trans zigzag conformation is the most stable state for the alkyl side chain in PBA18C comb-like polymer. Temperature variation caused the reversible transition between trans and gauche conformational states of the side octadecyl group, and in turn made the molecular chain packing mode of PBA18C comb-like polymer undergo an reversible transformation from ordered packing to disordered packing. (C) 2004 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000223562900022 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/82025]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Ying, Z |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China 2.Peking Univ, Coll Chem & Mol Engn, State key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, HF,Ying, Z,Zhang, XQ,et al. Packing mode and conformational transition of alkyl side chains in N-alkylated poly(p-benzamide) comb-like polymer[J]. POLYMER,2004,45(18):6299-6307. |
| APA | Shi, HF.,Ying, Z.,Zhang, XQ.,Yong, Z.,Xu, YZ.,...&Xu, DF.(2004).Packing mode and conformational transition of alkyl side chains in N-alkylated poly(p-benzamide) comb-like polymer.POLYMER,45(18),6299-6307. |
| MLA | Shi, HF,et al."Packing mode and conformational transition of alkyl side chains in N-alkylated poly(p-benzamide) comb-like polymer".POLYMER 45.18(2004):6299-6307. |
入库方式： OAI收割
来源：化学研究所
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