Electrophoretic deposition of polymers. II. Polyimides: A coulombic study

摘要

AbstractQuantitative studies on the electrophoretic deposition of a polyimide polymer were carried out over the voltage range 25–100 V dc. Deposition yield was related to voltage, time, and coulombs and was found to obey Faraday's laws of electrolysis. Equations relating yield to voltage and coulombs were obtained from the plotted data. Results of coulombic studies indicate that the effective equivalent weight of the polymeric species being deposited is between 6800 and 7500 (i.e., amount deposited per faraday). The coulombic yield is 75 mg per coulomb. Information and speculation on the size and composition of the electroactive species are presente