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Titolo:
Oxidative copolymers of aniline with o-toluidine: Their structure and thermal properties
Autore:
Huang, MR; Li, XG; Yang, YL; Wang, XS; Yan, DY;
Indirizzi:
Tongji Univ, Coll Mat Sci & Engn, Dept Polymer Mat Sci & Engn, Shanghai 200092, Peoples R China Tongji Univ Shanghai Peoples R China 200092 ghai 200092, Peoples R China Fudan Univ, Key Lab Mol Engn Polymers, Dept Macromol Sci, Shanghai 200433,Peoples R China Fudan Univ Shanghai Peoples R China 200433 anghai 200433,Peoples R China Shanghai Jiao Tong Univ, Coll Chem & Chem Technol, Shanghai 200240, Peoples R China Shanghai Jiao Tong Univ Shanghai Peoples R China 200240 Peoples R China
Titolo Testata:
JOURNAL OF APPLIED POLYMER SCIENCE
fascicolo: 8, volume: 81, anno: 2001,
pagine: 1838 - 1847
SICI:
0021-8995(20010822)81:8<1838:OCOAWO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-RESOLUTION THERMOGRAVIMETRY; THIN-FILM; POLYANILINE; TEREPHTHALATE); DECOMPOSITION; TRANSPORT; MEMBRANES;
Keywords:
polytoluidine; toluidine copolymer; oxidative polymerization; nuclear magnetic resonance spectra; thermogravimetric analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Li, XG Tongji Univ, Coll Mat Sci & Engn, Dept Polymer Mat Sci & Engn, 1239SipingRd, Shanghai 200092, Peoples R China Tongji Univ 1239 Siping Rd Shanghai Peoples R China 200092 R China
Citazione:
M.R. Huang et al., "Oxidative copolymers of aniline with o-toluidine: Their structure and thermal properties", J APPL POLY, 81(8), 2001, pp. 1838-1847

Abstract

Chemically oxidative polymerization of aniline and o-toluidine (OT) with 6molar ratios was performed using ammonium persulfate as an oxidant in a HCl medium at -18 degreesC. It was observed that the copolymers were not regularly dependent on the monomer ratio for yield and intrinsic viscosity. Theresulting copolymers were characterized by Fourier transform IR spectroscopy, H-1-NMR spectroscopy, wide-angle X-ray diffraction, differential scanning calorimetry, and several thermogravimetry methods. The results showed that the actual content of the OT unit in the copolymers was much higher thanthe feed content of the OT unit. Given the same reaction conditions, o-toluidine showed a larger tendency toward homopolymerization rather than toward copolymerization with aniline. The copolymers were amorphous and exhibited thermal decomposition temperatures higher than 440 degreesC and a char yield larger than 39 wt % at 900 degreesC in nitrogen. The activation energy of thermal decomposition for the copolymers was 40-244 kJ/mol in nitrogen and 32 kJ/mol in air, respectively. (C) 2001 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 20:59:59