Effect of <italic style="font-style: italic">γ</italic>-ray irradiation on mechanical properties and crystallinity of ultra-high molecular weight polyethylene sheets

Jianxi LI; Yongdong SHAN; Jia GU

doi:10.11889/j.0253-3219.2016.hjs.39.040202

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Effect of γ-ray irradiation on mechanical properties and crystallinity of ultra-high molecular weight polyethylene sheets

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- Effect of γ-ray irradiation on mechanical properties and crystallinity of ultra-high molecular weight polyethylene sheets
- NUCLEAR TECHNIQUES Vol. 39, Issue 4, Article number: 040202(2016)
- 作者机构：
  
  1.中广核三角洲(江苏)塑化有限公司苏州 215400;
  2.中广核三角洲(江苏)新材料研发有限公司苏州 215400
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.040202
  CLC： TL13
- Received：25 January 2016，
  
  Accepted：2016-03-01，
  
  Published：25 January 2016
- 稿件说明：
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Jianxi LI, Yongdong SHAN, Jia GU. Effect of γ-ray irradiation on mechanical properties and crystallinity of ultra-high molecular weight polyethylene sheets[J]. Nuclear techniques, 2016, 39(4): 040202
DOI：

Jianxi LI, Yongdong SHAN, Jia GU. Effect of γ-ray irradiation on mechanical properties and crystallinity of ultra-high molecular weight polyethylene sheets[J]. Nuclear techniques, 2016, 39(4): 040202 DOI： 10.11889/j.0253-3219.2016.hjs.39.040202.

摘要

采用钴源以剂量率为2.5kGy·h

-1

的

射线对超高分子量聚乙烯(Ultra-high Molecular Weight Polyethylene

UHMWPE)片材在空气、水、甲醇和乙醇氛围中进行了辐照

吸收剂量范围为0-200kGy。通过机械性能、凝胶含量、差示扫描量热仪(Differential Scanning Calorimetry

DSC)、傅里叶变换红外光谱仪(Fourier Transform Infrared Spectrometer

FTIR)等对不同辐照氛围中辐照前后UHMWPE样品进行了测试和表征。机械性能测试结果表明

在空气中UHMWPE的断裂伸长率随吸收剂量呈幂指数下降

同时屈服强度略有下降

而在水、甲醇、乙醇为辐照体系中UHMWPE的断裂伸长率随吸收剂量也是呈下降趋势

但下降的程度依次减轻

同时屈服强度基本保持不变;DSC测试结果显示

在空气氛围中

随着吸收剂量的增加

UHMWPE样品的初始熔融温度、熔点、结晶温度和结晶度逐渐降低;而在空气、水、甲醇和乙醇氛围中

UHMWPE样品的初始熔融温度、熔点和结晶度依次上升;红外光谱测试结果显示在空气中辐照

UHMWPE样品表面随着吸收剂量的增加其氧化程度加重

而在水、甲醇和乙醇中辐照UHMWPE分子链生成了不饱和的分子双键。

Abstract

Background:

Ultra-high molecular weight polyethylene(UHMWPE) is a kind of widely used engineering plastics due to its excellent physical and chemical properties. But it has the poor creep resistance.

Purpose:

The aim is to improve its creep resistance

environmental stress cracking and shape stability.

Methods:

The UHMWPE sheets were irradiated in

air

water

methanol and ethanol at the dose rate of 2.5kGy·h

-1

in the range of 0-200kGy. And the UHMWPE samples were tested and characterized by mechanical properties

gel content

differential scanning calorimetry(DSC) and infrared spectra.

Results and Conclusion:

The mechanical property test results revealed that the elongation at break of UHMWPE samples decreased obviously with the increasing of radiation dose. In water

methanol and ethanol

the elongation at break of UHMWPE samples also decreased with the increasing radiation dose

but the decrease degree was reduced

while the yield strength remained unchanged. DSC test results showed that the initial melting temperature

melting point and crystallinity of the UHMWPE samples decreased with the increasing absorbed dose in the air atmosphere

while increased in the atmosphere of water

methanol and ethanol. Infrared spectrum test results showed that the oxidation on the surface of the UHMWPE samples increased with the absorbed dose irradiated in the atmosphere of air

and in water

methanol and ethanol

the molecular chains of UHMWPE molecules generated double bond under radiation.

关键词

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references

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Effect of γ-ray irradiation on mechanical properties and crystallinity of ultra-high molecular weight polyethylene sheets

DOI：10.11889/j.0253-3219.2016.hjs.39.040202

摘要

Abstract

关键词

Keywords

references