纺织科学与工程学报2024，Vol.41Issue(1)：58-67,10.DOI:10.3969/j.issn.2096-5184.2024.01.011
乙纶分子结构及热变性三级长波近红外-中红外光谱研究
Study on the Molecular Structure and Thermal Denaturation of Polyethylene Fibers by Three-stage Long Wave Near Infrared-Mid infrared Spectroscopy
摘要
Abstract
Long wave-near infrared-mid infrared(LW-NIR-MIR)spectroscopy was used to study the molecular structure of polyethylene fibers.It is found that the infrared absorption modes mainly include:2νasCH3-deconvolution-polyethylene fibers,2νasCH2-deconvolution-polyethylene fibers,2νsCH3-deconvolution-polyethylene fibers,2νsCH2-deconvolution-polyethylene fibers,(νasCH2-deconvolution-polyethylene fibers+νCH-deconvolution-polyethylene fibers),(νasCH2-deconvolution-polyethylene fibers+νsCH2-deconvolution-polyethylene fibers),νasCH3-deconvolution-polyethylene fibers,νsCH3-deconvolution-polyethylene fibers,νasCH2-deconvolution-polyethylene fibers,νsCH2-deconvolution-polyethylene fibers,δCH2-deconvolution-polyethylene fibers and ρCH2-deconvolution-polyethylenefibers.Further research was conducted on the LW-NIR-MIR spec-troscopy at variable temperatures.In the temperature range of 303～393 K,the main functional groups(2νsCH2-deconvolution-polyethylene fibers,νasCH2-deconvolution-polyethylene fibers and ρCH2-deconvolution-polyethylene fibers)frequency and intensity had significant changed.Finally,two-dimensional LW-NIR-MIR spectroscopy study was carried out.In the NIR-MIR range,5835 cm-1(2νasCH2-2-two-dimensional-polyethylene fibers)>5700 cm-1(2νsCH2-two-dimensional-polyethylene fibers)>5867 cm-1(2νasCH2-1-two-dimensional-polyethylene fibers)>5800 cm-1(νasCH2-two-dimensional-polyethylene fibers+νCH-two-dimensional-polyethylene fibers)>5762 cm-1(νasCH2-two-dimensional-polyethylene fibers+νsCH2-two-dimensional-polyethylenefibers)>5894 cm-1(2νasCH3-two-dimensional-polyethylene fibers).In the MIR range,2915 cm-1(νasCH2two-dimensional-polyethylene fibers)>2845 cm-1(νsCH2-two-dimensional-polyethylene fibers)>2945 cm-1(νasCH3-two-dimensional-polyethylene fibers)>2885 cm-1(νsCH3-two-dimensional-polyethylene fibers).1452 cm-1(δCH2-2-two-dimensional-polyethylene fibers)>1475 cm-1(δCH2-1-two-dimensional-polyethylene fibers).In the range of LW-NIR-MIR range,5835 cm-1(2νasCH2-2-two-dimensional-polyethylene fibers)>2915 cm-1(νasCH2-two-dimensional-polyethylene fibers)>2845 cm-1(νsCH2-two-dimensional-polyethylene fibers)>5894 cm-1(2νasCH3-two-dimensional-polyethylene fibers).The main functional groups of polyethylene fibers molecular structure have great differences in the sensitivity to heat and the order of change.This research expanded the research scope of three-stage LW-NIR-MIR spectroscopy in the molecular structure and thermal denaturation of polyethylene fibers mol-ecules.关键词
乙纶/长波近红外-中红外光谱/结构/热变性Key words
Polyethylene fibers/Long wavelength-near infrared-middle infrared spectroscopy/Structure/Thermal denaturation分类
轻工业引用本文复制引用
柴嘉欣,吉一帆,李雨情,宗鹤宸,宗雪晴,王静伟,常美玲,于宏伟..乙纶分子结构及热变性三级长波近红外-中红外光谱研究[J].纺织科学与工程学报,2024,41(1):58-67,10.基金项目
石家庄市麻醉药技术创新中心项目(2023),河北省生物制药国际联合中心项目(2023). （2023）
