CAS OpenIR  > 中科院上海原子核所2003年前
Positronium formation in PE/EVA polymer blends at low temperatures
Wang, CL; Kobayashi, Y; Zheng, W; Zhang, C
Source PublicationPOLYMER
AbstractPositronium (Ps) formation in a polymer blend system consisting of polar and non-polar components has been investigated. We measured positron lifetime spectra for a series of polymer blends between polyethylene (PE) and ethylene-vinyl acetate (EVA) as functions of temperature (T = 100-300 K) and composition (EVA weight content Phi = 0-100%) as well as measurement time (t = 0-100 h) at T = 100 and 250 K. The glass transition temperatures for blends, around 227 K as determined by the ortho-positronium (o-Ps) lifetime tau (3) versus temperature, were invariant, within the experimental error, as a function of EVA concentration. Large variations of the o-Ps formation probability I-3 versus temperature and time, observed for pure LDPE and blends with relatively low concentrations of EVA, were interpreted on the basis of the spur reaction model of Ps formation, with reference to the effects of localized electrons and trapping centers produced by positron irradiation. In the blends with higher EVA concentrations, the effects of positron irradiation were appreciably weakened, as the result of positron trapping on the polar acetate group of EVA. (C) 2000 Elsevier Science Ltd. All rights reserved.
Indexed BySCI
Funding Project应物所项目组
WOS IDWOS:000165934200009
Citation statistics
Document Type期刊论文
Recommended Citation
GB/T 7714
Wang, CL,Kobayashi, Y,Zheng, W,et al. Positronium formation in PE/EVA polymer blends at low temperatures[J]. POLYMER,2001,42(6):2359.
APA Wang, CL,Kobayashi, Y,Zheng, W,&Zhang, C.(2001).Positronium formation in PE/EVA polymer blends at low temperatures.POLYMER,42(6),2359.
MLA Wang, CL,et al."Positronium formation in PE/EVA polymer blends at low temperatures".POLYMER 42.6(2001):2359.
Files in This Item: Download All
File Name/Size DocType Version Access License
Positronium formatio(161KB) 开放获取--View Download
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, CL]'s Articles
[Kobayashi, Y]'s Articles
[Zheng, W]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, CL]'s Articles
[Kobayashi, Y]'s Articles
[Zheng, W]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, CL]'s Articles
[Kobayashi, Y]'s Articles
[Zheng, W]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Positronium formation in PEEVA polymer blends at low temperatures.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.