Patent ID: 8546489
Filing Date: 2013-10-01
Classification: C08L

Abstract:
1. A composition comprising a polymer blend comprising: a polyimide precursor, a polyacrylonitrile, and a cellulosic polymer; wherein the polyimide precursor forms a continuous phase in the blend and is derived from: the polyacrylonitrile forms domains in a discontinuous phase in the blend and has a loading of from about 1 weight percent to about 50 weight percent, based on the polyimide obtainable from the polyimide precursor; and the cellulosic polymer forms domains in a discontinuous phase in the blend; has a loading of from about 1 weight percent to about 40 weight percent, based on the weight of polyimide obtainable from the polyimide precursor; and has a number average molecular weight in the range of about 500 to about 300,000 dalton.