Synthesis and Characterization of Phosphorous Containing Sulfonated Polyimides: Proton Exchange Membrane Properties http://127.0.0.1/xmlui/handle/123456789/10528 Wed, 15 Apr 2026 21:48:47 GMT 2026-04-15T21:48:47Z Synthesis and Characterization of Phosphorous Containing Sulfonated Polyimides: Proton Exchange Membrane Properties http://127.0.0.1/xmlui/handle/123456789/10529 Synthesis and Characterization of Phosphorous Containing Sulfonated Polyimides: Proton Exchange Membrane Properties Mandal, Arun Kumar Fri, 01 Mar 2019 00:00:00 GMT http://127.0.0.1/xmlui/handle/123456789/10529 2019-03-01T00:00:00Z