Epoxy-functionalized polyethylene-octene prepared by γ-ray radiation and its application in polyamide 6 toughening modification

LIANG Qingru; JI Zhenyan; DONG Chunlei; ZHANG Fan; XING Zhe; AN Yarui; WU Guozhong

doi:10.11889/j.1000-3436.2022-0107

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Epoxy-functionalized polyethylene-octene prepared by γ-ray radiation and its application in polyamide 6 toughening modification

RADIATION CHEMISTRY | 更新时间：2023-09-15

- Epoxy-functionalized polyethylene-octene prepared by γ-ray radiation and its application in polyamide 6 toughening modification
- Journal of Radiation Research and Radiation Processing Vol. 41, Issue 1, Pages: 24-32(2023)
- 作者机构：
  
  1.上海理工大学上海 200093
  2.中国科学院上海应用物理研究所上海 201800
  3.上海科技大学上海 200031
- 作者简介：
  
  LIANG Qingru (male) was born in February 1998, and obtained his bachelor's degree from Luoyang Normal University in 2020. Now he is a graduate student at University of Shanghai Science and Technology, majoring in chemical engineering
  XING Zhe, assistant professor, E-mail: xingzhe@sinap.ac.cn
  WU Guozhong, professor, E-mail: wuguozhong@sinap.ac.cn
- 基金信息：
  
  Major Scientific and Technological Project of Shanghai Institute of Applied Physics, Chinese Academy of Chinese Academy of Sciences(E215101031)
- DOI：10.11889/j.1000-3436.2022-0107
  CLC：
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LIANG Qingru, JI Zhenyan, DONG Chunlei, et al. Epoxy-functionalized polyethylene-octene prepared by γ-ray radiation and its application in polyamide 6 toughening modification. [J]. Journal of Radiation Research and Radiation Processing 41(1):24-32(2023)
DOI：

LIANG Qingru, JI Zhenyan, DONG Chunlei, et al. Epoxy-functionalized polyethylene-octene prepared by γ-ray radiation and its application in polyamide 6 toughening modification. [J]. Journal of Radiation Research and Radiation Processing 41(1):24-32(2023) DOI： 10.11889/j.1000-3436.2022-0107.

摘要

利用,60,Co γ射线辐射接枝法制备环氧功能化的乙烯-辛烯共聚物（POE-,g,-PGMA），并且采用双螺杆熔融挤出法制备添加POE-,g,-PGMA的尼龙6/聚乙烯-辛烯（PA6/POE）合金。研究了添加POE-,g,-PGMA对PA6/POE合金力学性能、热性能、表面形貌、界面相容性和吸水特性的影响。结果表明：γ射线引发了GMA在POE上的接枝聚合反应，PA6/POE合金断面的SEM照片显示添加POE-,g,-PGMA后POE分散相粒径显著减小，表明POE-,g,-PGMA起到增容剂的作用；Molau试验的结果证实了POE-,g,-PGMA与PA6之间的增容反应；热分析表明，分散相POE及POE-,g,-PGMA的加入对PA6的熔融行为影响不大，但在降温结晶过程中结晶温度提前约18 °C，结晶度提升约为4.5%。此外，与未增容PA6/POE合金相比，增容PA6/POE合金的缺口冲击强度显著提高，在本实验条件下，POE-,g,-PGMA添加量为3%时缺口冲击强度最高值为纯PA6的2.75倍。

Abstract

Epoxy-functionalized ethylene-octene copolymer (POE-,g,-PGMA) was prepared by ,60,Co γ-ray radiation, and polyamide 6/polyethylene-octene blend (PA6/POE) containing POE-,g,-PGMA was prepared by twin-screw melt extrusion. In this study, the mechanical properties, thermal properties, surface morphology, interfacial compatibility, and water absorption properties of PA6/POE blends with added POE-g-PGMA were investigated. The results showed that GMA was successfully grafted on POE by γ-ray radiation. The morphological analysis showed that the addition of POE-,g,-PGMA enhanced the dispersion of POE particles in the PA6 matrix. In particular, it demonstrated that with the addition of POE-,g,-PGMA, pure PA6 has good interfacial compatibility with POE. The results of the Molau test confirmed the compatibilization reactions between POE-,g,-PGMA and PA6. The thermal analysis showed that the addition of POE and POE-,g,-PGMA in the dispersed phase had negligible effect on the melting behavior of PA6; however, the crystallization temperature of PA6 improved by approximately 18 °C during the cooling crystallization process, and the crystallinity increased by approximately 4.5%. Furthermore, the impact strength of the compatibilized PA6/POE blend was significantly higher than that of the PA6/POE blend, with the highest value of impact strength obtained at a POE-,g,-PGMA content of 3% being approximately 2.75 times greater than that of pure PA6 under the experimental conditions.

关键词

辐射接枝环氧功能化尼龙6界面相容性缺口冲击强度

Keywords

Radiation graftingEpoxy functionalizationPolyamide 6Interfaciale compatibilityNotched impact strength

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