Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Kinetic models for solution imidization of polyamic acid containing naphthalene-pendant group
Autore:
Leu, TS; Wang, CS;
Indirizzi:
Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan Natl Cheng Kung Univ Tainan Taiwan 701 ept Chem Engn, Tainan 701, Taiwan Yung Ta Inst Technol & Commerce, Dept Chem Engn, Linlo 900, Pingtung, Taiwan Yung Ta Inst Technol & Commerce Linlo Pingtung Taiwan 900 ingtung, Taiwan
Titolo Testata:
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
fascicolo: 23, volume: 39, anno: 2001,
pagine: 4139 - 4151
SICI:
0887-624X(200112)39:23<4139:KMFSIO>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
AROMATIC TETRACARBOXYLIC DIANHYDRIDES; BIS(ETHER ANHYDRIDE)S; POLY(ETHER IMIDE)S; POLYIMIDES; BISMALEIMIDE; BEHAVIOR;
Keywords:
kinetic parameters; homogeneous solution imidization; kinetic mechanism; kinetic models; kinetic (polym.); activation energy; GPC; NMR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, CS Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan Natl Cheng Kung Univ Tainan Taiwan 701 Engn, Tainan 701, Taiwan
Citazione:
T.S. Leu e C.S. Wang, "Kinetic models for solution imidization of polyamic acid containing naphthalene-pendant group", J POL SC PC, 39(23), 2001, pp. 4139-4151

Abstract

The kinetics and mechanisms of the solution imidization of polyamic acid resulting from a diamine, bis(4-aminophenoxy-3,5-dimethylphenyl)naphthylmethane, and a dianhydride, 3,3'4,4'-diphenylsulfonetetracarboxylic dianhydride, were studied at three various temperatures (145, 165, and 180 degreesC). The results were confirmed by means of H-1 NMR and gel permeation chromatography (GPC). Kinetic parameters were obtained by an isothermal study, and the results were quite close to second-order kinetics for the homogeneous solution imidization. In addition, Carother's equation, Mark-Houwink theory, and GPC were used to explain the molecular weight of the imidization processes. The apparent activation energy (E-a) was 104 KJ/mol, and the pre-exponential factor (k(0)) was 3.48 x 10(14). The proposed kinetic mechanism is in good agreement with the kinetic models. (C) 2001 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/07/18 alle ore 13:18:21