Samal Babanzadeh - Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran.
shahram mehdipour-ataei - Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran.

Bis(m-aminophenoxy)diphenylsilane (3-APS) as a silane diamine was prepared by the reaction of 3-aminophenol (3-AP) with dichlorodiphenylsilane(ph2SiCl2) in the presence of triethylamine(TEA). The related silane-containing polyimides were prepared by two-step polycondensation reactions of the diamine with two different aromatic dianhydrides. All the polymers were characterized and their physical and thermal properties were studied. The polymers showed high thermal stability while their solubility was greatly increased in polar aprotic solvents. Wide angle X-ray diffraction showed that all the polyimides were almost amorphous. Also their dielectric constants were decreased due to the incorporation of softening and low-polarizing siloxane units into the polymer backbone. The related nano hybrids based on SiO2 were synthesized and characterized

Polyimide, Polycondensation, Hybrid, SiO2