[1]武玉洁,常 明,杨若冰,等.涤纶晶体结构三级红外光谱研究[J].红外技术,2020,42(6):589-597.[doi:10.11846/j.issn.1001_8891.202006012]
 WU Yujie,CHANG Ming,YANG Ruobing,et al.Three-step Infrared Spectrum of Dacron Crystal Structure[J].Infrared Technology,2020,42(6):589-597.[doi:10.11846/j.issn.1001_8891.202006012]
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涤纶晶体结构三级红外光谱研究
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《红外技术》[ISSN:1001-8891/CN:CN 53-1053/TN]

卷:
42卷
期数:
2020年第6期
页码:
589-597
栏目:
出版日期:
2020-06-23

文章信息/Info

Title:
Three-step Infrared Spectrum of Dacron Crystal Structure
文章编号:
1001-8891(2020)06-0589-09
作者:
武玉洁1常 明2杨若冰2胡梦璇2董 妍2于宏伟2
1. 河北一品制药股份有限公司,河北 石家庄 052165;2. 石家庄学院 化工学院,河北 石家庄 050035
Author(s):
WU Yujie1CHANG Ming2YANG Ruobing2HU Mengxuan2DONG Yan2YU Hongwei2
1. Hebei Yipin Pharmaceutical Co., LTD., Shijiazhuang 052165, China;
2. School of Chemical Engineering, Shijiazhuang University, Shijiazhuang 050035, China
关键词:
涤纶红外光谱晶体热稳定性玻璃化转变
Keywords:
dacron infrared spectrum crystal thermostability glass transition
分类号:
O434.3
DOI:
10.11846/j.issn.1001_8891.202006012
文献标志码:
A
摘要:
采用红外(IR)光谱研究涤纶的晶体结构(ν-crystal-涤纶)。研究发现:涤纶主要存在着ν-crystal-1-涤纶(1335 cm-1)、ν-crystal-2-涤纶(969 cm-1)和ν-crystal-3-涤纶(847 cm-1)等3大晶体特征吸收谱带。采用变温红外(TD-IR)光谱开展了涤纶的晶体结构热稳定性研究。实验发现:在353~393K的温度范围内,随着测定温度的升高,涤纶ν-crystal-涤纶对应的吸收强度及频率有明显的改变。这主要是因为玻璃化温度后,会进一步破坏涤纶晶体的结构。采用二维红外(2D-IR)光谱,以涤纶ν-crystal为研究对象,进一步开展了涤纶玻璃化转变研究机理。在加热过程中,涤纶大分子链表现出不同的运动状态。玻璃化温度前(313~343 K),涤纶分子发生分子运动的冻结,玻璃化温度后(353~393 K)涤纶即将进入高弹态。本项研究拓展了三级IR光谱(包括:IR光谱,TD-IR光谱和2D-IR光谱)在涤纶结构,热稳定性及玻璃化转变的应用研究范围。
Abstract:
The dacron crystal structures (ν-crystal-dacron) were studied by infrared (IR) spectrum, for instance, ν-crystal-1-dacron(1335 cm-1), ν-crystal-2-dacron(969 cm-1), and ν-crystal-3-dacron(847 cm-1). In addition, the dacron thermostability was studied by temperature-dependent infrared(TD-IR) spectrum. We obtained that the corresponding absorption intensity and frequency of dacron ν-crystal-dacron were changed (353-393 K) because its crystal structure was destroyed by the temperature. We further studied the glass transition of dacron ν-crystal-dacron was by two-dimensional infrared(2D-IR) spectrum. During heating, the dacron macromolecular chain showed different motion states. The dacron molecules froze in molecular motion before the glass transition temperature (313-343 K); however, these molecules nearly entered a high elastic state after the glass transition temperature (353-393 K). This study demonstrated the key roles of three-step infrared spectrum (including IR spectrum, TD-IR spectrum, and 2D-IR spectrum) in the analysis of structure, thermostability, and glass transition of the important polymer material(dacron).

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备注/Memo

备注/Memo:
收稿日期:2019-08-02;修订日期:2019-11-12.
作者简介:武玉洁(1975-),女,汉族,山西人,高级工程师,主要从事药物包材红外光谱检测相关研究工作。
通信作者:于宏伟(1979-),男,汉族,黑龙江人,工学博士,副教授,现主要从事高分子材料红外光谱研究工作。E-mail:yhw0411@163.com。
基金项目:河北省麻醉药技术创新中心自研项目(2019),石家庄市麻醉药技术创新中心自研项目(2019),石家庄市藁城区科学技术研究与发展计划课题(G201804)。
更新日期/Last Update: 2020-06-22