Normal modes and their dispersion in poly(α-isobutyl-β-L-aspartate) I.: 4/1 Helix

被引：2
|
作者：
Kumar, A
Misra, NK
Kapoor, D
Tandon, P
Munoz-Guerra, S
Gupta, VD [1 ]
机构：
[1] Univ Lucknow, Dept Phys, Lucknow 226007, Uttar Pradesh, India
[2] ETS Engn Ind Barcelona, Dept Engn Quim, E-08028 Barcelona, Spain
来源：
EUROPEAN POLYMER JOURNAL | 2001年 / 37卷 / 04期
关键词：
stereoregular; dispersion curves; density of states; cross-over;
D O I：
10.1016/S0014-3057(00)00186-5
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(alpha -isobutyl-beta -L-aspartate) is a stereoregular derivative of polyamides and exist in 4/1 and 13/4 helices. Normal mode analysis and their dispersion of the 4/1 form have been carried out using Urey-Bradley force constants. Apart from detailed assignment of modes, characteristic features of dispersion curves such as repulsion and cross-over have been explained as arising due to internal symmetry in the energy momentum space. Predictive Values of heat capacity contribution from various types of modes are also reported. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：815 / 828
页数：14
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