The Hydrogen Bond and Free Volume Property of Poly(ether-urethane) Irradiated by Neutron

被引：13
作者：
Chen, Z. [1 ]
Huang, W. [2 ]
Fang, P. F. [1 ]
Yu, W. [1 ]
Wang, S. J. [1 ]
Xiong, J. [2 ]
Xu, Y. S. [2 ]
机构：
[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China
[2] China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Peoples R China
来源：
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2010年 / 48卷 / 03期
关键词：
degradation; free volume; FTIR; hydrogen bonding; microstructure; phase separation; polyurethanes; positron annihilation; radiation; POSITRON-ANNIHILATION SPECTROSCOPY; MOLECULAR-WEIGHT POLYETHYLENE; TEMPERATURE-DEPENDENCE; MECHANICAL-PROPERTIES; GAMMA-IRRADIATION; LIFETIME SPECTRA; RADIATION; POLYMERS; NANOCOMPOSITES; POLYURETHANE;
D O I：
10.1002/polb.21900
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(ether-urethane) (PEU) was irradiated by neutron in different atmospheres. The hydrogen bonding interaction was analyzed by Fourier transform infrared (FTIR), and the microstructure of PEU had been investigated by positron annihilation lifetime spectroscopy (PALS). The gas products were detected by gas chromatography after irradiation. The results demonstrated that the irradiation led to more hydrogen bonded carbonyl in PEU, smaller relative free volume fraction, and narrower free volume distribution. It suggested that increasing hydrogen bonds would result in the collapse of free volume. The irradiation induced micro-phase merging together and the presence of oxygen would accelerate this tendency, which was revealed by PALS. All the results indicated that the chain relaxation led to more hydrogen bonds, and the hydrogen bonding interaction suppressed the free volume. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 381-388, 2010
引用
收藏
页码：381 / 388
页数：8
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