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[1]吴江渝,钟翔,付俊*,等.电子束辐照交联超高分子量聚乙烯等温结晶动力学[J].武汉工程大学学报,2012,(06):42-48.[doi:103969/jissn16742869201206011]
　WU Jiang\|yu,ZHONG Xiang,FU Jun,et al.Isothermal crystallization kinetics of electron beam cross-linked ultra-high molecular weight polyethylene[J].Journal of Wuhan Institute of Technology,2012,(06):42-48.[doi:103969/jissn16742869201206011]
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电子束辐照交联超高分子量聚乙烯等温结晶动力学
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2012年06期
页码:
42-48
栏目:
资源与土木工程
出版日期:
2012-06-30

文章信息/Info

Title:
Isothermal crystallization kinetics of electron beam cross-linked
ultra-high molecular weight polyethylene
文章编号:
16742869(2012)06004207
作者:
吴江渝1; 钟翔1; 2; 付俊2*; 高国荣2
1.武汉工程大学材料科学与工程学院，湖北 武汉 430074；
2.中国科学院宁波材料技术与工程研究所,浙江 宁波 315201
Author(s):
WU Jiang\|yu1;  ZHONG Xiang1; 2;  FU Jun2;  GAO Guo\|rong2
1. School of Materials Science & Engineering, Wuhan Institute of Technology, Wuhan 430074, China;
2. Ningbo Material Institute of Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
关键词:
超高分子量聚乙烯; 交联网络; 等温结晶动力学
Keywords:
ultra-high molecular weight polyethylene; cross-linked network;  isothermal crystallization kinetics
分类号:
TQ325.12
DOI:
103969/jissn16742869201206011
文献标志码:
A
摘要:
研究了电子束辐照交联超高分子量聚乙烯的等温结晶行为与辐照剂量、交联度和结晶温度的关系.首先，用差示扫描量热技术（DSC）研究了以0，50，100 kGy电子束辐照的超高分子量聚乙烯分别在不同的温度下等温结晶过程，发现半结晶时间（t1/2）和Avrami指数（n值）与结晶温度有关.与未交联超高分子量聚乙烯相比，交联聚乙烯等温结晶动力学的t1/2和n值较小，证明交联网络可加速聚乙烯成核，且抑制晶体生长.在此基础上，采用阶梯式温度“跃变”方法，诱导交联聚乙烯分子链在不同温度下分别结晶，得到具有多个熔融温度的交联聚乙烯结晶，而未交联的超高分子量聚乙烯则只显示单一熔融温度，证实了在交联聚乙烯中存在的不均匀交联网络结构导致分子链结晶能力不同.
Abstract:
The isothermal crystallization of radiated cross-linked ultra-high molecular weight polyethylene (UHMWPE) was investigated as a function of irradiation dose and crystallization temperature by differential scanning calorimetry (DSC). Isothermal crystallization of polyethylene irradiated with electron beam with 0, 50, and 100 kGy doses shows the dependences of half crystallization time (t1/2) and Avrami index (n value) on the crystallization temperature. Cross-linked UHMWPE shows lower t1/2 and n values, in comparison to non-irradiated UHMWPE, indicating that cross-linked network may accelerate the crystallization but hinder the crystal growth after nucleation. Furthermore, we crystallized cross-linked UHMWPE by sequentially quenching the polymer melted to different crystal temperatures to facilitate respective crystallization of polymer chains or segments, resulting in the crystal of cross-linked polyethylene with multiple melt temperatures, while non-cross-linked polyethylene shows just single melt temperature, which indicates that heterogeneous network within the cross-linked UHMWPE causes such unique crystallization behavior.

参考文献/References:

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相似文献/References:

[1]秦建华,郝绘坤,王兴隆,等.超高分子量聚乙烯耐热性能的改善[J].武汉工程大学学报,2014,(06):25.[doi:103969/jissn16742869201406006]
　QIN Jian hua,HAO Hui kun,WANG Xing long,et al.Heat resistance modification of ultra high molecular weight polyethylene[J].Journal of Wuhan Institute of Technology,2014,(06):25.[doi:103969/jissn16742869201406006]

备注/Memo

备注/Memo:
收稿日期：20120521基金项目：国家自然科学青年基金(21004074)作者简介：吴江渝（1977-），男，教授，博士，硕士生导师.研究方向：生物医用高分子.
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