Propylene sorption and coordinative interactions for poly(N-vinyl pyrrolidone-co-vinyl acetate)/silver salt complex membranes

Seung Hwan Joo, Jong Hak Kim, Sang Wook Kang, Jyongsik Jang, Yong Soo Kang

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

When poly(N-vinyl pyrrolidone-co-vinyl acetate) (PVP-co-PVAc) containing amide and ester groups were complexed with silver salts to form silver polymer electrolyte membranes, their separation performance of propylene/propane mixtures showed the high selectivity of propylene over propane of 55 and the high mixed gas permeance of 12 GPU (1 GPU = 1.0 × 10-6 cm 3(STP) cm-2 s-1 cmHg-1). The separation performance strongly depends on the composition of the copolymer: the higher concentration of PVP in the copolymer, the better separation performance was achieved. These results suggest that the amide group is more effective in facilitated propylene transport than the ester group, primarily due to the stronger interaction of the silver ions with the amide than the ester oxygens, as demonstrated by FT-IR and FT-Raman spectroscopies. In-situ FT-IR spectra upon propylene sorption also demonstrate that the interaction strength of the silver ions with the ligands is arranged: amide > C=C > ester.

Original languageEnglish
Pages (from-to)2263-2269
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume45
Issue number16
DOIs
Publication statusPublished - 2007 Aug 15

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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