Microwave-Assisted Simultaneous Synthesis of Conducting and Non-Conducting Polymers from Potassium 2,4,6-Tribromophenolate

Download
index.pdf
2009-01-01
Celik, Gueler Bayrakli
Kisakurek, Duygu
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
198
views
0
downloads
A simultaneous synthesis of white poly(dibromophenylene oxide) (P) or yellow radical ion polymer (RIP) and black conducting polymer (CP) were achieved from potassium 2,4,6-tribromophenolate by microwave energy in a very short time. Polymerizations were carried out (i) under constant microwave energy and constant amount of water with different time intervals ranging from I to 7 min or (ii) at constant time intervals and constant amount of water with variation of microwave energy ranging from 70 to 900 watt or (iii) at constant time intervals and constant microwave energy with changing amount of water ranging from 0.5 to 5 mL. The synthesis of P and CP were achieved in 3 min at 70 watt and in I min in the range of 180-900 watt in 0.5 mL water whereas RIP was only achieved either at 70 or 350 watt in 17 or 25 min and in 0.5 or 5 mL water. The optimum conditions for synthesis of P, RIP and CP were for (i) 350 watt for 3 min in 5 mL water, for (ii) 350 watt for 25 min in 5 mL water and for (iii) 500 watt for I min in 0.5 mL water with maximum values of 39.2, 35.0 and 27.9%, respectively. RIP was synthesized only at 70 watt in 17 min and at 350 watt in 3 min, having maximum conversion value of 35.0%. The polymers were characterized via elemental analysis, FT-IR, (1)H and (13)C NMR, X-ray diffraction spectroscopy, DSC, TGA-FTIR, ESR, SEM conductivity measurement and Light Scattering. Polymerizations of P and RIP were proceeding though both 1,2- and 1,4-addition at equal rates having a branch structure and their molecular weights were 8.1 x 10(4) g/mol and 1.2 x 10(4) g/mol respectively. P and RIP were rigid polymers having high T(g) values. The synthesis of conducting polymer, with the conductivity of 1.34 S cm(-2) was achieved in the absence of doping process.
Materials Chemistry, Polymers and Plastics
https://hdl.handle.net/11511/65956
POLYMER JOURNAL
Department of Chemistry, Article

Suggestions

Microwave-assisted simultaneous synthesis of conducting, non-conducting and cross-linked polymers from sodium 2,4,6-tribromophenolate and LiOH
Celik, Gueler Bayrakli; Kisakuerek, Duygu (Informa UK Limited, 2007-01-01)
Poly(dibromophenylene oxide) (P) and conducting polymer (CP) and/or cross-linked polymer (CLP) were synthesized simultaneously from sodium 2,4,6-tribromophenol ate and LiOH by microwave energy in a very short time interval. Polymerizations were carried out (i) under constant microwave energy and constant amount of water with different time intervals ranging from I to 20 min, or (ii) at constant time intervals and constant amount of water with variation of microwave energy ranging from 90 to 900 W, or (iii) ...
Poly(ethylene terephthalate)/Carbon Nanotube Composites Prepared With Chemically Treated Carbon Nanotubes
Yesil, Sertan; Bayram, Göknur (Wiley, 2011-07-01)
Surfaces of multiwalled carbon nanotubes (CNT) were functionalized by treatment with strong acid mixture (purification) followed by modification with sodium dodecyl sulfate, poly(ethylene glycol) (PEG), and diglycidyl ether of Bisphenol A (DGEBA). Poly(ethylene terephthalate) (PET)-based conductive polymer composites were prepared by using these CNT by means of melt mixing with a twin screw extruder. Amount of carboxylic acid groups on the CNT surface increased after acid treatment but decreased with surfac...
A new soluble conducting polymer and its electrochromic devices
YİLDİZ, UMİT HAKAN; SAHİN, ELİF; Akhmedov, IM; Tanyeli, Cihangir; Toppare, Levent Kamil (Wiley, 2006-04-01)
A new polythiophene derivative was synthesized by both chemical and electrochemical oxidative polymerization of 1-(1-phenylethyl)-2,5-di(2-thienyl)-1H-pyrrole (PETPy). Of which the chemical method produces a polymer that is completely soluble in organic solvents. The structures of both the monomer and the soluble polymer were elucidated by nuclear magnetic resonance (H-1 and C-13 NMR) and Fourier transform infrared (FTIR) spectroscopy. The average molecular weight has been determined by gel permeation chrom...
Electropolymerization of a New 4-(2,5-Di-2-thiophen-2-yl-pyrrol-1-yl)-Tetra Substituted Nickel Phthalocyanine Derivative
Yavuz, Arzu; Carbas, Buket Bezgin; Aras, Leyla; Önal, Ahmet Muhtar (Wiley, 2011-10-15)
A new tetrakis 4-(2,5-di-2-thiophen-2-yl-pyrrol-1-yl) substituted nickel phthalocyanine (NiPc-SNS) was synthesized and characterized by elemental analysis, Fourier Transform Infrared (FT-IR), and UV-vis spectroscopies. The electrochemical polymerization of this newly synthesized NiPc-SNS was performed in dichloromethane (DCM)/tetrabutylammonium perchlorate (TBAP) solvent/electrolyte couple. An insoluble film was deposited on the electrode surface, both during repetitive cycling and constant potential electr...
Studies on the modification of interphase/interfaces by use of plasma in certain polymer composite systems
Akovali, G; Dilsiz, N (Wiley, 1996-04-01)
Calcium carbonate and carbon fiber surfaces were modified by use of a series of plasma polymers at different selected plasma conditions, and the effect of surface modification, mainly on the mechanical properties of composite systems prepared, was investigated. The matrices for the composite systems employed were polypropylene and epoxy, for the chalk and C fiber, respectively. Mechanical and thermal studies and scanning electron microscopy (SEM) pictures revealed that inclusion surfaces, being independent ...
Citation Formats
G. B. Celik and D. Kisakurek, “Microwave-Assisted Simultaneous Synthesis of Conducting and Non-Conducting Polymers from Potassium 2,4,6-Tribromophenolate,” POLYMER JOURNAL, pp. 1129–1135, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65956.
METU IIS - Integrated Information Service open@metu.edu.tr