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- Title
Divinyl benzene cross-linked HTPB-based polyurethaneurea membranes for separation of p-/ o-xylene mixtures by pervaporation.
- Authors
Gu, Jin; Zhang, Chun-Fang; Bai, Yun-Xiang; Zhang, Lin; Sun, Yu-Ping; Chen, Huan-Lin
- Abstract
Cross-linked hydroxy terminated polybutadiene (HTPB)-based polyurethaneurea (PU), HTPB-divinyl benzene (DVB)-PU, was synthesized by a three-step polymerization process. It was first used as membrane material to separate p-/ o-xylene mixtures by pervaporation (PV). The effects of the content of cross-linker DVB, feed concentration, and operating temperature on the PV performance of HTPB-DVB-PU membranes were investigated. The membranes demonstrated p-xylene permselectivity as well as high total flux. The introduction of DVB significantly enhanced the temperature resistance ability of the HTPB-DVB-PU membranes. With increasing DVB content, the separation factor increased while the total flux decreased a little. The highest separation factor reaches 2.01 and the total flux is 33 g/m2h with feed concentration of 10 wt % p-xylene at 30°C. These PV performances with increasing DVB content were explained in terms of the view point of chemical compositions and physical structures of the HTPB-DVB-PU membranes. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
- Subjects
BENZENE; POLYBUTADIENE; ARTIFICIAL rubber; POLYMERIZATION; XYLENE
- Publication
Journal of Applied Polymer Science, 2012, Vol 123, Issue 4, p1968
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.34690