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首页> 外文期刊>Journal of Applied Polymer Science >The yellowing mechanism of polyesteramide based on poly(ethylene terephthalate) and polyamide 6
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The yellowing mechanism of polyesteramide based on poly(ethylene terephthalate) and polyamide 6

机译：基于聚（对苯二甲酸乙二醇酯）和聚酰胺6的聚酯酰胺黄化机理

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摘要

The yellowing mechanism in polyesteramide based on poly(ethylene terephthalate) and polyamide 6 (PET-PA6) has been studied. Amine model compounds were employed to react with acetaldehyde (AA), and 1H-nuclear magnetic resonance spectrometer (H-1-NMR), fourier transform infrared spectroscopy (FT-IR), and electrospray ionization mass spectrometry (ESI-MS) were used to characterize the structure of the yellowing products.C-13-NMR, laser confocal micro-Raman spectrum, and X-ray photoelectron spectroscopy (XPS) were used to characterize the yellowing products of the reaction of PA6 oligomers and AA. The structures of yellowing substances in the two systems are consistent. The color generation is mainly caused by the reaction of the terminal primary amine group of PA6 with AA, which is the thermal degradation product of PET, to form Schiff bases. These Schiff bases condense further to form a conjugated imine structure, which may be the main chromophore of polyesteramide. Due to the degradation of PA6 segments of the copolymer, it may further degrade to form new primary amino groups and increase yellowness during use.
机译：研究了基于聚对苯二甲酸乙二醇酯和聚酰胺6（PET-PA6）的聚酯酰胺的黄变机理。采用胺模型化合物与乙醛（AA）反应，并使用1H核磁共振谱仪（H-1-NMR）、傅立叶变换红外光谱（FT-IR）和电喷雾电离质谱（ESI-MS）对泛黄产物的结构进行表征。用C-13-NMR、激光共聚焦显微拉曼光谱和X射线光电子能谱（XPS）表征了PA6低聚物与AA反应的黄变产物。这两个体系中发黄物质的结构是一致的。颜色的产生主要是由PA6末端伯胺基与PET热降解产物AA反应形成希夫碱引起的。这些席夫碱进一步缩合形成共轭亚胺结构，这可能是聚酯酰胺的主要生色团。由于共聚物的PA6段降解，在使用过程中可能进一步降解形成新的伯氨基并增加黄色。

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  • 来源
    《Journal of Applied Polymer Science》 |2021年第10期|共10页
  • 作者

    Qi Mengyan; Zheng Liuchun; Li Chuncheng; Xiao Yaonan; Liu Jiajian; Wu Shaohua; Zhang Bo;

  • 作者单位

    Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Res Educ Ctr Excellence Mol Sci Key Lab Engn Plast Inst Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Res Educ Ctr Excellence Mol Sci Key Lab Engn Plast Inst Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Res Educ Ctr Excellence Mol Sci Key Lab Engn Plast Inst Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Res Educ Ctr Excellence Mol Sci Key Lab Engn Plast Inst Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Res Educ Ctr Excellence Mol Sci Key Lab Engn Plast Inst Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Res Educ Ctr Excellence Mol Sci Key Lab Engn Plast Inst Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Res Educ Ctr Excellence Mol Sci Key Lab Engn Plast Inst Chem Beijing 100190 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    acetaldehyde; conjugated imine; polyesteramide; Schiff base;

    机译：乙醛;共轭亚胺;聚酯酰胺;Schiff Base;

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