سال انتشار: ۱۳۸۵
محل انتشار: اولین کنفرانس فناوری نانو در محیط زیست
تعداد صفحات: ۶
Shahram Mehdipour-Ataei – Iran Polymer and Petrochemical Institute, tehran, Iran
Azam Rahimi – Iran Polymer and Petrochemical Institute, tehran, Iran
Samaneh Saidi – Iran Polymer and Petrochemical Institute, tehran, Iran
Synthesis of high temperature polyimide foams with pore sizes in the nanometer rang was developed. Foams were prepared by casting graft copolymers comprising a thermally stable block as the matrix and a thermally labile material as the dispersed phase. Polyimides derived from pyromellitic dianhydride with new diamines were used as the matrix material and functionalized poly(ropylene glycol) oligomers were used as athermally labile constituent. Upon thermal treatment the labile blocks were subsequently removed leaving pores with the size and shape of the original copolymer morphology. The polyimides and foamed polyimides were characterized by some conventional methods.