Structural changes of polytetrafluoroethylene during irradiation in oxygen

Autor:	Liu Shuling, Zili Yu, Congli Fu, Aiqun Gu
Rok vydání:	2015
Předmět:	Radiation Polytetrafluoroethylene Materials science chemistry.chemical_element Crystal structure Oxygen chemistry.chemical_compound symbols.namesake chemistry X-ray photoelectron spectroscopy symbols Crystallite Irradiation Raman spectroscopy Fluoride Nuclear chemistry
Zdroj:	Radiation Physics and Chemistry. 109:1-5
ISSN:	0969-806X
DOI:	10.1016/j.radphyschem.2014.12.005
Popis:	To study the effect of irradiation on PTFE structure and prepare modified PTFE micropowder, PTFE was irradiated with dose up to 4 MGy in oxygen at room temperature. The structures of both irradiated and unirradiated PTFE samples were comparatively characterized by IR, XPS, Raman spectra and XRD measurement. The results showed that new groups of acyl fluoride (COF), carboxylic acid (COOH) and trifluoromethyl (CF3) were formed under heavy radiation exposure in oxygen. In addition, the expansion of crystallite size or crystal lattice was first reported for the irradiated PTFE. The formation of new chemical groups and the expansion of crystallite size were elucidated by structural changes occurring in irradiation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::31a74543ff81984373a408dc4a9b094e https://doi.org/10.1016/j.radphyschem.2014.12.005 Zobrazit plný text záznamu Full Text from ScienceDirect