Electrocopolymerization of pyrrole with bis(4-aminobutyl)polydimethylsiloxane

Purpose - The purpose of this paper is to synthesise the block copolymer of pyrrole (Py) with bis(4-inobutyl)polydimethylsiloxane (DA.PDMS) by electrochemical method. The characterisation of the insoluble block copolymers, P(Py-b-DA.PDMS), was performed by cyclovoltammetric measurements, solid-state...

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Bibliographic Details
Published in:Pigment & resin technology 2012-01, Vol.41 (3), p.179-186
Main Authors: Ustamehmeto lu, Belk s, K z lcan, Nilgün, Demir, Ömer
Format: Article
Language:English
Subjects:
Block copolymers
Chemistry
Conduction
Conductivity
Copolymers
Differential scanning calorimetry
Doping
Electrodes
Electrolytes
Electrons
Oxidation
Polymer films
Polymerization
Polymers
Pyrroles
Resins
Scanning electron microscopy
Studies
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Summary:Purpose - The purpose of this paper is to synthesise the block copolymer of pyrrole (Py) with bis(4-inobutyl)polydimethylsiloxane (DA.PDMS) by electrochemical method. The characterisation of the insoluble block copolymers, P(Py-b-DA.PDMS), was performed by cyclovoltammetric measurements, solid-state conductivity and DSC measurements. The surface morphology of the copolymers was examined with scanning electron microscope (SEM).Design methodology approach - Electropolymerisation process was performed potentiostatically and potentiodynamically. Redox behaviour of the resulting copolymer films was investigated. In-situ spectroelectrochemical measurement was carried out on indium thin oxide (ITO) electrodes.Findings - The ionisation potentials (Ip), electron affinity (Ea), optical band gap (Eg), peak potentials (Ep), and doping degree (y) of copolymers were calculated by using in-situ spectroelectrochemical measurement results. The copolymers have slightly lower doping degree, band gap, Ip and Ea values than homopolymer. Copolymers had the conductivities of 10-5 S cm and had Tg values.Research limitations implications - This study can also be focused on obtaining conductive copolymer with insulator DA.PDMS blocks on the PPy chain by one-step polymerisation.Practical implications - This work provides technical information for the synthesis and characterisation of conducting block copolymer by electrochemical method.Originality value - Change in optical and electrical properties of the P(Py-b-DA.PDMS) shows the role of the individual properties of the copolymer blocks. While the DSC scan of PPy showed no transition temperature, which is a characteristic property of conducting copolymers, P(Py-b-DA.PDMS) had Tg values. This might be due to the inclusion of the DA.PDMS blocks on the PPy chains.
ISSN:0369-9420
1758-6941
DOI:10.1108/03699421211226471