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γ 射线辐照对超高分子量聚乙烯片材机械性能和结晶度的影响Effect of
γ -ray irradiation on mechanical properties and crystallinity of ultra-high molecular weight polyethylene sheets- 核技术 2016年39卷第4期 文章编号：040202
- 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：
李建喜,男,1983年出生,2015年于中国科学院上海应用物理研究所获博士学位,现主要从事高分子材料的辐射加工
- 基金信息：
DOI：10.11889/j.0253-3219.2016.hjs.39.040202
中图分类号： TL13收稿日期：2016-01-25，
录用日期：2016-03-01，
纸质出版日期：2016-01-25
- 稿件说明：
移动端阅览
李建喜, 单永东, 顾佳.
γ 射线辐照对超高分子量聚乙烯片材机械性能和结晶度的影响[J]. 核技术, 2016,39(4):040202Jianxi 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李建喜, 单永东, 顾佳.
γ 射线辐照对超高分子量聚乙烯片材机械性能和结晶度的影响[J]. 核技术, 2016,39(4):040202 DOI： 10.11889/j.0253-3219.2016.hjs.39.040202.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
γ
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:
2
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:
2
The aim is to improve its creep resistance
environmental stress cracking and shape stability.
Methods:
2
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:
2
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
Keywords
references
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