苯并三氮唑取代基含量对聚乙烯介电性能的影响

钟冰; 王煜; 尤伟

doi:10.11777/j.issn1000-3304.2024.24270

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苯并三氮唑取代基含量对聚乙烯介电性能的影响

研究论文(明日之星专栏) | 更新时间：2025-06-17

- 苯并三氮唑取代基含量对聚乙烯介电性能的影响
- The Influence of Benzotriazole Substituent Content on the Dielectric Properties of Polyethylene
- 高分子学报 2025年56卷第5期页码：677-689
- 作者机构：
  
  1.中国科学院化学研究所北京分子科学国家研究中心中国科学院工程塑料重点实验室北京 100190
  2.中国科学院大学北京 100049
- 作者简介：
  
  E-mail: ywang507@iccas.ac.cn
  weiyou@iccas.ac.cn
- 基金信息：
  
  北京市自然科学基金(基金号 2232074)
- DOI：10.11777/j.issn1000-3304.2024.24270
  中图分类号：
- CSTR：32057.14.GFZXB.2024.7333
- 收稿日期：2024-11-02，
  
  录用日期：2024-12-13，
  
  网络出版日期：2025-02-26，
  
  纸质出版日期：2025-05-20
- 稿件说明：
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钟冰, 王煜, 尤伟. 苯并三氮唑取代基含量对聚乙烯介电性能的影响. 高分子学报, 2025, 56(5), 677-689

Zhong, B.; Wang, Y.; You, W. The influence of benzotriazole substituent content on the dielectric properties of polyethylene. Acta Polymerica Sinica, 2025, 56(5), 677-689
钟冰, 王煜, 尤伟. 苯并三氮唑取代基含量对聚乙烯介电性能的影响. 高分子学报, 2025, 56(5), 677-689 DOI： 10.11777/j.issn1000-3304.2024.24270. CSTR： 32057.14.GFZXB.2024.7333.

Zhong, B.; Wang, Y.; You, W. The influence of benzotriazole substituent content on the dielectric properties of polyethylene. Acta Polymerica Sinica, 2025, 56(5), 677-689 DOI： 10.11777/j.issn1000-3304.2024.24270. CSTR： 32057.14.GFZXB.2024.7333.

摘要

以商品化的乙烯-醋酸乙烯酯共聚物(EVA)为原料，采用Mitsunobu衍生化反应成功合成了一系列含有不同苯并三氮唑含量的聚乙烯(PE)衍生物. 通过红外光谱和核磁共振技术对合成的苯并三氮唑修饰聚乙烯衍生物进行表征，确认其分子结构. 研究结果表明，随着官能团含量的增加，材料的热稳定性降低，乙烯链段的结晶度也呈现下降趋势，但介电常数得到了显著提升. 此外，基于PE衍生物与线性低密度聚乙烯(LLDPE)基体的相容性，成功制备了两者的共混材料. 在固定取代基总含量的情况下，比较PE衍生物的官能化程度和PE衍生物在共混材料中含量两个因素对共混物介电常数的影响，发现增加PE衍生物官能化程度是提高介电常数的重要方式. 这些发现为聚合物介电材料的分子设计提供了新的借鉴.

Abstract

This study utilizes commercial ethylene-vinyl acetate copolymer (EVA) as the starting material and successfully synthesized a series of polyethylene (PE) derivatives containing varying amounts of benzotriazole groups through Mitsunobu derivatization reactions. The synthesized polyethylene benzotriazole derivatives were characterized using infrared spectroscopy and nuclear magnetic resonance techniques to confirm their molecular structures. The results indicated that as the functional group content increased

the thermal stability of the material decreased

and the crystallinity of the ethylene segments also showed a declining trend

while the dielectric constant was significantly enhanced. Furthermore

based on the compatibility of the PE derivatives with the linear low-density polyethylene (LLDPE) matrix

blended materials of the two were successfully prepared. By fixing the total content of the substituent groups

the study compared the effects of the functionalization degree of the PE derivatives and their content in the blend on the dielectric constant of the blend. It was found that increasing the functionalization degree of the PE derivatives more effectively improves the dielectric constant. These findings provide new insights for the molecular design of polymer dielectric materials.

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