NDLI: Preparation and characterization of semiconducting polymeric blends. Photochemical synthesis of poly(3-alkylthiophenes) using host microporous matrices of poly(vinylidene fluoride)

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Polymer Chemistry Vol - 3 Issue - 4

Polymer Chemistry Vol - 3 Issue - 3

Polymer Chemistry Vol - 3 Issue - 2

Polymer Chemistry Vol -2

Polymer Chemistry Vol -1

Preparation and characterization of semiconducting polymeric blends. Photochemical synthesis of poly(3-alkylthiophenes) using host microporous matrices of poly(vinylidene fluoride)

Content Provider	Royal Society of Chemistry (RSC)
Author	Zakia, Maria Beny Pinto Gomes, Alex Linardi Filho, José Godoy Armelin, Elaine Campos, João Sinezio de Carvalho Alemán, Carlos
Copyright Year	2012
Abstract	Chemical and electrochemical synthesis techniques have been the principal methods of obtaining polymers in industry and scientific research laboratories. However, during the last two decades, photochemical synthesis, although poorly studied, has been reported to present several advantages, in that it is a fast and cheap technique, and it is not aggressive to the environment. The technique has been applied to the production of some conducting polymers. In this study, semiconducting polymeric blends composed of PT3AA-K–PVDF and PT3MA–PVDF were respectively obtained by photochemical polymerization in aqueous solutions of 3-thiophene acetic acid and 3-thiophene methyl acetate monomers using PVDF microporous matrices and potassium dichromate as catalyst. The percentage of products and by-products incorporated in the host matrix was obtained by gravimetric analysis. The chemical structures of the polymers synthesized were analyzed by FTIR, UV-vis and 1H NMR. GPC analysis indicated the formation of oligomers composed of 5–6 mers. The morphology of the matrices and polymeric blends was observed by SEM-EDS and their electric behavior evaluated by measures of electric conductivity. The SEM images show the presence of polythiophene in the pores of the PVDF microporous membrane. The thermal properties of the polymers and their blends were evaluated by DSC and TGA. Thermal analysis by DSC demonstrated an increase in melting temperature of the blends, attributed to the confinement of PVDF crystalline phases for the polymer photosynthesized. The results of volumetric conductivity measurements of polymeric blends show an increase in conductivity in the matrices from 10−15 to 10−11 S cm−1.
Starting Page	1334
Ending Page	1343
Page Count	10
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	3
Issue Number	5
Journal	Polymer Chemistry
DOI	10.1039/c2py00003b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Gravimetric analysis Polyvinylidene fluoride Polythiophene Polymerization Polymer Thiophene Composite material 3-Thiophene acetic acid Electrical resistivity and conductivity DSC Carboxylic acid Electrochemistry GPC Methyl acetate Nuclear magnetic resonance Thermal analysis The Technique Potassium dichromate Photochemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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Use of polythiophene and poly(thiophene-3-acetic acid) as charge-selective films for amperometric flow-cell detectors

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