Citation:
XU Guanfan, SUN Xiaoguang, QIU Xuepeng, ZHANG Jinlan, ZHENG Guodong. XPS STUDIES ON SURFACE MODIFIED POLY [1-(TRIMETHYLSILYL)-1-PROPYNE] MEMBRANES Ⅱ SURFACE MODIFICATION BY BROMINE VAPOR*[J]. Chinese Journal of Polymer Science,
1994, 12(2): 180-184.
XPS STUDIES ON SURFACE MODIFIED POLY [1-(TRIMETHYLSILYL)-1-PROPYNE] MEMBRANES Ⅱ SURFACE MODIFICATION BY BROMINE VAPOR*
摘要:
Surface modification of poly [1-(trimethylsilyl)-1-propyne] (PTMSP) membranes bybromine vapor has been studied. It is shown that Br/C atomic ratio at the surfaces increased withthe time of bromination until about 60 min, then it reached a plateau. The results of XPS and IRstudies indicated that the addition of bromine to double bonds and the replacement of H on CH3 bybromine had taken place so that a new peak at 286.0 eV (C--Br)in C1s spectra and some newbands, e. g. at 1220 and 580cm-1 in IR spectra were formed.The fact,Po2 permeability of oxygen,decreased and αo2/N2,separation factor of oxygen relative to nitrogen,increased with bromination time,shows that surface modification of PTMSP by bromine may be an effcient approach to prepare PTMSP membranes used for practical gas separations.
English
XPS STUDIES ON SURFACE MODIFIED POLY [1-(TRIMETHYLSILYL)-1-PROPYNE] MEMBRANES Ⅱ SURFACE MODIFICATION BY BROMINE VAPOR*
Abstract:
Surface modification of poly [1-(trimethylsilyl)-1-propyne] (PTMSP) membranes bybromine vapor has been studied. It is shown that Br/C atomic ratio at the surfaces increased withthe time of bromination until about 60 min, then it reached a plateau. The results of XPS and IRstudies indicated that the addition of bromine to double bonds and the replacement of H on CH3 bybromine had taken place so that a new peak at 286.0 eV (C--Br)in C1s spectra and some newbands, e. g. at 1220 and 580cm-1 in IR spectra were formed.The fact,Po2 permeability of oxygen,decreased and αo2/N2,separation factor of oxygen relative to nitrogen,increased with bromination time,shows that surface modification of PTMSP by bromine may be an effcient approach to prepare PTMSP membranes used for practical gas separations.
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