Preparation of porous polyimide films by selective decomposition of poly(meth…

A series of porous polyimide (PI) films were prepared by decomposing PI/poly(methyl methacrylate) (PMMA)-blended films at appropriate high temperature for a certain period of time in air. The pore-forming agent, PMMA, was blended with poly(amic acid) (PAA) by in situ blending method. As a thermally labile polymer, PMMA was decomposed first to generate substances with low molecular weight, leavi…