Add time:07/19/2019         Source:sciencedirect.com

Block copolymers of polypyrrole (PPy) and thienyl end capped cyclohexanone formaldehyde resin (ThCFR) were synthesized via chemical oxidative polymerization of (Py) and ThCFR in the presence of cerium (IV) oxidic dibenzoate (CODB). The treatment of Py with CODB was maintained in non-aqueous media at room temperature. Several solvents including toluene, dichloromethane (DCM), were used. Besides the role of reaction media, the effect of ceric (IV) oxidic compound on polymerization was investigated. Reactions with constant amount of Py, and CODB to Py mol ratios of 0.33:1.0, 0.5:1.0 and 1.0:1.0 were observed. The results showed that in one-hour limited time, block copolymers could be obtained in toluene and dichloromethane with CODB: Py: ThCFR mol ratio of 1.0: 1.0: 0.01. Conductivities of polypyrroles were determined by 4-point probe technique. Block copolymers were prepared in dichloromethane and toluene, respectively.

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