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Titolo:
THERMAL-DEGRADATION OF AROMATIC POLYFORMALS DERIVED FROM BISPHENOL-A AND BISPHENOL-AF
Autore:
NAKAMURA S; SUZUKI Y; KOJIMA T; TAGO K;
Indirizzi:
KANAGAWA UNIV,FAC ENGN,DEPT APPL CHEM,KANAGAWA KU,3-27-1 ROKKAKUBASHIYOKOHAMA KANAGAWA 221 JAPAN NATL DEF ACAD,DEPT CHEM YOKOSUKA KANAGAWA 239 JAPAN
Titolo Testata:
Thermochimica acta
, volume: 267, anno: 1995,
pagine: 231 - 237
SICI:
0040-6031(1995)267:<231:TOAPDF>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DECOMPOSITION;
Keywords:
THERMAL DEGRADATION; AROMATIC POLYFORMAL; FLUORINE-CONTAINING POLYMER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
6
Recensione:
Indirizzi per estratti:
Citazione:
S. Nakamura et al., "THERMAL-DEGRADATION OF AROMATIC POLYFORMALS DERIVED FROM BISPHENOL-A AND BISPHENOL-AF", Thermochimica acta, 267, 1995, pp. 231-237

Abstract

Thermal degradation of fluorine-containing Polyformal II from bisphenol AF and dichloromethane was studied by TG-DTA/FTIR, Pyr-GC/MS and Pyr-GC and compared with that of Polyformal I without fluorine atoms, which was derived from bisphenol A and dichloromethane. The thermal degradation of Polyformal II occurs in two stages, whereas that of Polyformal I occurs in a single stage. The major products of thermal decomposition of Polyformal I are alpha-methylstyrene, phenol, 4-hydroxy-alpha-methylstyrene, isopropyl phenol, and 4-isopropenyl anisole, whereas those of Polyformal II are pentafluoroisopropenyl benzene and pentafluoroisopropenyl anisole. Tne two-step decrease in weight of Polyformal II by thermal degradation is not caused by the different reactions, butresults from the different vapor pressures, that is, the different rates of vaporization between the decomposition products, more volatile pentafluoroisopropenyl benzene and less volatile pentafluoroisopropenyl anisole.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 15:12:50