γ射线辐照对超高分子量聚乙烯/改性纳米伊蒙土复合材料的拉伸性能及热稳定性的影响

董鹏刚; 陈有双; 唐忠锋; 梁兴泉; 林宝凤

doi:10.11889/j.1000-3436.2017.rrj.35.040303

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γ射线辐照对超高分子量聚乙烯/改性纳米伊蒙土复合材料的拉伸性能及热稳定性的影响

辐射化学 | 更新时间：2021-12-10

- γ射线辐照对超高分子量聚乙烯/改性纳米伊蒙土复合材料的拉伸性能及热稳定性的影响
- Thermostability and tensile-property of ultra-high molecular weight polyethylene/modified illite-smectite interstratified clay minerals composites irradiated by γ-rays
- 辐射研究与辐射工艺学报 2017年35卷第4期
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.广西科技大学生化工程学院柳州 545006
  3.广西大学化学化工学院南宁 530004
- 作者简介：
  
  [ "董鹏刚, 男, 1988年9月出生, 2017年于广西大学获硕士学位, 研究方向为传蓄热新材料的研发", "ZDONG Penggang (male) was born in September 1988, and received his master's degree from Guangxi university in 2017, majoring in heat transfer and storage materials" ]
  唐忠锋, 博士, 副研究员, E-mail:tangzhongfeng@sinap.ac.cn Ph.D. TANG Zhongfeng, associate professor, E-mail:tangzhongfeng@sinap.ac.cn
- 基金信息：
  
  中科院战略先导专项(XDA02020000);国家自然科学基金(11505268);上海市自然科学基金(15ZR1448600)
- DOI：10.11889/j.1000-3436.2017.rrj.35.040303
  中图分类号：
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董鹏刚, 陈有双, 唐忠锋, 等. γ射线辐照对超高分子量聚乙烯/改性纳米伊蒙土复合材料的拉伸性能及热稳定性的影响[J]. 辐射研究与辐射工艺学报, 2017,35(4):040303-6.

Penggang DONG, Youshuang CHEN, Zhongfeng TANG, et al. Thermostability and tensile-property of ultra-high molecular weight polyethylene/modified illite-smectite interstratified clay minerals composites irradiated by γ-rays[J]. Journal of Radiation Research and Radiation Processing, 2017,35(4):040303-6.
董鹏刚, 陈有双, 唐忠锋, 等. γ射线辐照对超高分子量聚乙烯/改性纳米伊蒙土复合材料的拉伸性能及热稳定性的影响[J]. 辐射研究与辐射工艺学报, 2017,35(4):040303-6. DOI： 10.11889/j.1000-3436.2017.rrj.35.040303.

Penggang DONG, Youshuang CHEN, Zhongfeng TANG, et al. Thermostability and tensile-property of ultra-high molecular weight polyethylene/modified illite-smectite interstratified clay minerals composites irradiated by γ-rays[J]. Journal of Radiation Research and Radiation Processing, 2017,35(4):040303-6. DOI： 10.11889/j.1000-3436.2017.rrj.35.040303.

摘要

采用熔融共混工艺制备超高分子量聚乙烯/改性纳米伊蒙土（Ultra-high molecular weight polyethylene/ modified illite-smectite interstratified clay, UHMWPE/M-ISIC）复合材料，将其分别在空气和N,2,气氛下γ射线辐照改性。结果表明，UHMWPE/M-ISIC的拉伸强度随M-ISIC添加量增加而先增后减，且在添加量为1%内时达到最大值。空气中辐照后UHMWPE的热稳定性降低明显，而UHMWPE/M-ISIC热稳定性降低不明显，在N,2,中辐照后则两者变化都不明显。纯UHMWPE在空气中辐照后其结晶度增大、N,2,中辐照后其结晶度减小；UHMWPE/M-ISIC的结晶度在空气和N,2,中辐照后都有减小。与纯UHMWPE相比，空气中辐照后UHMWPE/M-ISIC的凝胶含量及抗蠕变能力增加，而N,2,气氛下辐照后其凝胶含量以及抗蠕变能力变小。结果表明，在空气辐照后片层结构伊蒙土具有降低氧扩散速率进而减少裂解促进交联，在N,2,气氛下则阻碍了分子链的自由活动而阻碍了交联。

Abstract

The ultra-high molecular weight polyethylene/modified illite-smectite interstratified clay minerals composites (UHMWPE/M-ISIC) prepared by melt blending were irradiated by γ-rays with a dose of 75 kGy in air and N,2, atmosphere, respectively. The results showed that the tensile strength of UHMWPE/M-ISIC increased at first and then decreased with the increasing content of M-ISIC, and reached its maximum value within mass percent of 1% of M-ISIC. The thermal stability of UHMWPE after irradiation in air decreased significantly, while that of UHMWPE/M-ISIC decreased slightly. The thermal stabilities of neither material showed obvious changes after irradiation in N,2, atmosphere. The crystallinity of UHMWPE after irradiation in air increased significantly, but decreased in N,2, atmosphere, while that of UHMWPE/M-ISIC decreased after irradiation in both air and N,2, atmosphere. The gel content and creep resistance of UHMWPE/M-ISIC after irradiation in air were higher than those of UHMWPE, and lower in N,2, atmosphere. The results indicate that the M-ISIC irradiated in air could reduce the cracking by decreasing the diffusion rate of oxygen and thus promote the crosslinking effect. However, the crosslinking is hindered in N,2, atmosphere as the free activity of the molecular chain is hindered.

关键词

伊蒙土超高分子量聚乙烯复合材料拉伸性能热稳定性辐照

Keywords

Illite-smectite interstratified clay mineralsUHMWPE (Ultra-high molecular weight polyethylene)CompositesTensile-propertyThermal stabilityIrradiation

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