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Nanocomposites from polyimide and clay were prepared aiming at finding a promising method for enhancing particularly the tensile modulus of polyimide films. Polyimide-clay hybrids were prepared by blending of poly(amide acid) and organically modified-montmorillonite (OMMT) as a type of layered clays. Poly(amide acid) was prepared from the reaction of 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA)...
The effect of uniaxial cold-drawing on the development of graphite structure in films of polyimide BPDA/PDA and PMDA/ODA was investigated with different draw ratios at the stage of polyamic acid by magnetoresistance and X-ray diffraction measurements after heat treatment at 2800°C for 30 minutes. With the increase in ratio of uniaxial drawing, the maximum transverse magnetoresistance decreased, showing...
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