The infra-red spectra and molecular configurations of polyamides |
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| Affiliation: | 1. School of Textile and Materials Engineering, Dalian Polytechnic University, #1 Qinggongyuan, Ganjingzi, Dalian, 116034, Liaoning, PR China;2. State Key Laboratory of Bio-Fibers and Eco-textiles, Qingdao University, Qingdao, 266071, PR China;3. AccuPath Medical (Jiaxing) Co., Ltd., 1303 Yatai Rd., Nanhu District, Jiaxing, PR China;1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China;2. University of the Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, PR China;1. School of Materials Science & Engineering (Blk N4.1), Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;1. Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia-San Sebastián, 20018, Spain;4. IKERBASQUE, Basque Foundation for Science, Bilbao, Spain |
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| Abstract: | The infra-red spectra of a wide variety of polyamides of diamine-diacid and ω-amino acid type are reviewed. The amide-amide dipole interaction is the dominant factor controlling the packing and configurations of the molecules. Complete association occurs in all polymers and copolymers. This imposes a distortion on the hydrocarbon segments out of the planar zig-zag configuration in the copolymers with differing repeat unit lengths, and in the diamine-diacid polymers with odd numbers of CH2 groups in either or both sections of the repeat unit. |
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