Morphology of Vapor Deposited Polyimides Containing CopperPhthalocyanine

摘要

A vapor deposition polymerization technique is applied to grow composite films containing polyimide and copper phthalocyanine(CuPc). Specifically, 4,4(-oxydianiline and 3,3(,4,4(-biphenyl tetracarboxylic dianhydride are co-evaporated in thepresence of CuPc. Spectroscopy experiments confirm the formation of polyimide segments and suggest that embedded CuPcmolecules have less mobility than pure CuPc films. Electron microscopy and X-ray diffraction (XRD) studies show that themajority of CuPc initially assumes an amorphous phase. Upon curing, partial crystallization of CuPc occurs, forming smallcrystals (a phase) that are suspended in a polyimide matrix. These crystals exhibit enhanced thermal stability compared to purevapor-deposited CuPc.