07176247 is referenced by 12 patents and cites 6 patents.

A water insoluble interpenetrating polymer network is obtained by independently cross-linking a first polymer derived from a sulfonic acid or phosphonic acid group containing alkenyl monomer and a second polymer polymerized independently of the first polymer and interpenetrating the first polymer, where the second polymer is selectively permeable to water compared to methanol. Through adjustment of the degree of first polymer monomer acidification, polymer ratios and the extent of cross-linking in the at least two interpenetrating polymers, ion conductivity and solvent permeability are controlled. A film produced from such a water insoluble interpenetrating polymer network is well suited as a membrane in a direct methanol fuel cell. The relative degree and mechanism of cross-linking and interpenetrating the first polymer and second polymer are also adjustable parameters that impact on film properties.

Title
Interpenetrating polymer network
Application Number
10/607012
Publication Number
7176247 (B1)
Application Date
June 27, 2003
Publication Date
February 13, 2007
Inventor
Charles W Walker Jr
Olney
MD, US
Agent
William Randolph
Assignee
The United States of America represented by the Secretary of the Army
DC, US
IPC
C08L 43/02
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