2016-08-242016-08-241995-05-30http://hdl.handle.net/10919/72834Aramid polymers, e.g., those derived from p-phenylene diamine and terephthaloyl chloride, can have their solubility properties and flame retardancy enhanced by the incorporation therein of a moiety derived from a bis(aminophenoxyphenyl) phosphine oxide, e.g., bis(3-aminophenoxy-4'-phenyl) phenylphosphine oxide.application/pdfen-USPatenthttp://pimg-fpiw.uspto.gov/fdd/25/202/054/0.pdf7736541528/168528/337528/340C08G69/32C08G69/425420225