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Packing mode and conformational transition of alkyl side chains in N-alkylated poly(p-benzamide) comb-like polymer
Shi, HF; Ying, Z; Zhang, XQ; Yong, Z; Xu, YZ; Zhou, SR; Wang, DJ; Han, CC; Xu, DF
2004-08-19
Source PublicationPOLYMER
ISSN0032-3861
Volume45Issue:18Pages:6299-6307
AbstractA 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.
KeywordN-alkylated Poly(P-benzamide) Crystallization Conformational Transition
DOI10.1016/j.polymer.2004.07.005
Indexed BySCI
Language英语
WOS IDWOS:000223562900022
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:75[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82026
Collection中国科学院化学研究所
Corresponding AuthorYing, Z
Affiliation1.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
Recommended Citation
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.
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