摘要
采用中红外(MIR)光谱开展了凯芙拉的分子结构研究,实验发现,凯芙拉分子的红外吸收模式主要包括ν(NH–凯芙拉)、ν(amide–Ⅰ–凯芙拉)、ν(amide–Ⅱ–凯芙拉)、ν(C=C–凯芙拉)、β(C—H–凯芙拉)和γ(C—H–凯芙拉)。进一步开展了凯芙拉分子的变温中红外(TD–MIR)光谱研究,结果表明,随测定温度的升高(303~573K),凯芙拉分子主要官能团对应的红外光谱波数及强度均有明显改变,凯芙拉分子热稳定性进一步降低。
The molecular structure of Kevlar was investigated by using the mid-infrared (MIR) spectrum.It is found by the experiments that the infrared absorption modes of Kevlar molecule mainly include ν(NH-Kevlar),ν(amide-Ⅰ-Kevlar),ν(amide-Ⅱ-Kevlar),ν(C=C-Kevlar),β(C—H-Kevlar) and γ(C—H-Kevlar).The study on the temperature-dependent mid-infrared (TD-MIR) spectrum of Kevlar molecule was further carried out.The results show that with the increase of the determining temperature(303~573 K),the wave number and intensity of infrared spectrum corresponding to the main functional groups of Kevlar molecule all changed significantly,and the thermal stability of Kevlar molecule further decreased.
作者
吴梦谣
黄靖
刘梓钰
李泽腾
于宏伟
Wu Mengyao;Huang Jing;Liu Ziyu;Li Zeteng;Yu Hongwei(College of Chemical Engineering,Shijiazhuang University,Shijiazhuang 050035,China)
出处
《化学推进剂与高分子材料》
CAS
2022年第3期72-77,共6页
Chemical Propellants & Polymeric Materials
基金
石家庄学院2020年度专业认证专项教学改革研究与实践项目(ZXJG–202019)。
