Direct evidence of positron trapping at polar groups in a polymer-blend system

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海原子核所2003年前

	Direct evidence of positron trapping at polar groups in a polymer-blend system
	Nagai, Y ; Nonaka, T ; Hasegawa, M ; Kobayashi, Y ; Wang, CL ; Zheng, W ; Zhang, C
刊名	PHYSICAL REVIEW B
	1999
卷号	60 期号:17 页码:11863
ISSN号	1098-0121
英文摘要	Energy spectra of positron annihilation radiation were measured in polymer blends of polyethylene and ethylene vinyl acetate copolymer (E/VA) by means of the coincidence Doppler broadening technique. Positron annihilation with the core electrons of oxygen was appreciably increased by the addition of small amounts of E/VA to polyethylene and was detected with a sensitivity one order of magnitude higher than would be expected from the number density of the oxygen atoms in the polymer blends. This clearly shows that the positron is sensitively trapped by the polar acetate group of E/VA and demonstrates the usefulness of positrons as a sensitive chemical probe for polar structures in a nonpolar polymer matrix with high positron mobility. [S0163-1829(99)00941-8].
收录类别	SCI
语种	英语
WOS记录号	WOS:000083808700007
公开日期	2012-09-25
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/9935]
专题	上海应用物理研究所_中科院上海原子核所2003年前
推荐引用方式 GB/T 7714	Nagai, Y,Nonaka, T,Hasegawa, M,et al. Direct evidence of positron trapping at polar groups in a polymer-blend system[J]. PHYSICAL REVIEW B,1999,60(17):11863.
APA	Nagai, Y.,Nonaka, T.,Hasegawa, M.,Kobayashi, Y.,Wang, CL.,...&Zhang, C.(1999).Direct evidence of positron trapping at polar groups in a polymer-blend system.PHYSICAL REVIEW B,60(17),11863.
MLA	Nagai, Y,et al."Direct evidence of positron trapping at polar groups in a polymer-blend system".PHYSICAL REVIEW B 60.17(1999):11863.