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POLYMER SYNTHESIS AND THERMALLY REARRANGED POLYMRES AS GAS SEPARATION MEMBRANES

United States Patent Application

20120329958
A1
View the Complete Application at the US Patent & Trademark Office
The present invention includes a polymer formed by the thermal rearrangement of an ortho-functional polyimide synthesized via chemical imidization with permeation properties for gas separation membranes higher than those synthesized via thermal imidization and a method for forming that polymer having tailored transport properties and different chemical resistance. The present invention also includes a polymer formed by the thermal rearrangement of an ortho-functional polyimide in which a portion of the ortho-position functional group is lost during thermal rearrangement to yield a thermally rearranged polymer with higher permeability than would be seen without the ortho-position group. This ortho-position group can be the result of chemical imidization, or the result of a post-imidization modification reaction.
Freeman, Benny D. (Austin, TX), Sanders, David (Austin, TX), Ribeiro, JR., Claudio P. (Houston, TX), Smith, Zachary (Austin, TX), McGrath, James E. (Blacksburg, VA), Guo, Ruilan (Mishawaka, IN)
Virginia Tech Intellectual Properties, Inc. (Blacksburg VA), Board of Regents, The University of Texas System (Austin TX)
13/ 486,572
June 1, 2012
STATEMENT OF FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under Grant No DE-FG02-02ER15362 awarded by the Department of Energy. The government has certain rights in the invention.