LrgpV1, PascalFrancis, Corpus, bibRecord, 000680

Reaction kinetics of multiphase polymer systems under flow

Identifieur interne : 000680 ( PascalFrancis/Corpus ); précédent : 000679; suivant : 000681

Reaction kinetics of multiphase polymer systems under flow

Auteurs : Lian-Fang Feng ; Guo-Hua Hu

Source :

AIChE journal [ 0001-1541 ] ; 2004.

RBID : Pascal:05-0086615

Descripteurs français

Pascal (Inist)
- Cinétique, Vitesse réaction, Borne supérieure, Mélangeage, Collision, Aire interfaciale, Temps relaxation.

English descriptors

KwdEn :
- Collision, Interfacial area, Kinetics, Mixing, Reaction rate, Relaxation time, Upper bound.

Abstract

For given nominal molar concentrations in complementary functional groups, the common wisdom is that the reaction rate of those attached to large molecules does not exceed that of small molecule analogues. They are at best equal. The difference in reaction kinetics is more pronounced if reactive molecules are so large that they phase-separate, which is often so for polymers. In such cases, complementary functional groups from the two phases can meet and react only at the interfaces. Thus, reaction kinetics of functional groups attached to small molecules has always been taken as the upper bound for those attached to polymers. Here we show that under sufficient mixing, reaction kinetics of two immiscible reactive polymers can be significantly higher than that of small molecule analogues. This phenomenon is attributed to the combined effects of increasing collision probability originated from mixing-induced interfacial area generation, longer relaxation time of reactive polymer chains, and eventually interfacial slip.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A03		`1`		`@0 AIChE j.`
A05				`@2 50`
A06				`@2 10`
A08	`01`	`1`	`ENG`	`@1 Reaction kinetics of multiphase polymer systems under flow`
A11	`01`	`1`		`@1 FENG (Lian-Fang)`
A11	`02`	`1`		`@1 HU (Guo-Hua)`
A14	`01`			`@1 State Key Laboratory of Polymer Reaction Engineering, College of Materials Science and Chemical Engineering, Zhejiang University @2 Hangzhou @3 CHN @Z 1 aut.`
A14	`02`			`@1 Laboratory of Chemical Engineering Sciences, CNRS-ENSIC-INPL @2 Nancy @3 FRA @Z 1 aut.`
A14	`03`			`@1 Laboratory of Chemical Engineering Sciences, CNRS-ENSIC-INPL, BP 451 @2 54001 Nancy @3 FRA @Z 2 aut.`
A20				`@1 2604-2612`
A21				`@1 2004`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 7678 @5 354000122297390240`
A44				`@0 0000 @1 © 2005 INIST-CNRS. All rights reserved.`
A45				`@0 30 ref.`
A47	`01`	`1`		`@0 05-0086615`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 AIChE journal`
A66	`01`			`@0 USA`
C01	`01`		`ENG`	@0 For given nominal molar concentrations in complementary functional groups, the common wisdom is that the reaction rate of those attached to large molecules does not exceed that of small molecule analogues. They are at best equal. The difference in reaction kinetics is more pronounced if reactive molecules are so large that they phase-separate, which is often so for polymers. In such cases, complementary functional groups from the two phases can meet and react only at the interfaces. Thus, reaction kinetics of functional groups attached to small molecules has always been taken as the upper bound for those attached to polymers. Here we show that under sufficient mixing, reaction kinetics of two immiscible reactive polymers can be significantly higher than that of small molecule analogues. This phenomenon is attributed to the combined effects of increasing collision probability originated from mixing-induced interfacial area generation, longer relaxation time of reactive polymer chains, and eventually interfacial slip.
C02	`01`	`X`		`@0 001D07`
C03	`01`	`X`	`FRE`	`@0 Cinétique @5 01`
C03	`01`	`X`	`ENG`	`@0 Kinetics @5 01`
C03	`01`	`X`	`SPA`	`@0 Cinética @5 01`
C03	`02`	`X`	`FRE`	`@0 Vitesse réaction @5 02`
C03	`02`	`X`	`ENG`	`@0 Reaction rate @5 02`
C03	`02`	`X`	`SPA`	`@0 Velocidad reacción @5 02`
C03	`03`	`X`	`FRE`	`@0 Borne supérieure @5 03`
C03	`03`	`X`	`ENG`	`@0 Upper bound @5 03`
C03	`03`	`X`	`SPA`	`@0 Cota superior @5 03`
C03	`04`	`X`	`FRE`	`@0 Mélangeage @5 04`
C03	`04`	`X`	`ENG`	`@0 Mixing @5 04`
C03	`04`	`X`	`SPA`	`@0 Mezclado @5 04`
C03	`05`	`X`	`FRE`	`@0 Collision @5 05`
C03	`05`	`X`	`ENG`	`@0 Collision @5 05`
C03	`05`	`X`	`SPA`	`@0 Colisión @5 05`
C03	`06`	`X`	`FRE`	`@0 Aire interfaciale @5 06`
C03	`06`	`X`	`ENG`	`@0 Interfacial area @5 06`
C03	`06`	`X`	`SPA`	`@0 Superficie interfacial @5 06`
C03	`07`	`X`	`FRE`	`@0 Temps relaxation @5 07`
C03	`07`	`X`	`ENG`	`@0 Relaxation time @5 07`
C03	`07`	`X`	`SPA`	`@0 Tiempo relajación @5 07`
N21				`@1 052`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

Format Inist (serveur)

NO :	PASCAL 05-0086615 INIST
ET :	Reaction kinetics of multiphase polymer systems under flow
AU :	FENG (Lian-Fang); HU (Guo-Hua)
AF :	State Key Laboratory of Polymer Reaction Engineering, College of Materials Science and Chemical Engineering, Zhejiang University/Hangzhou/Chine (1 aut.); Laboratory of Chemical Engineering Sciences, CNRS-ENSIC-INPL/Nancy/France (1 aut.); Laboratory of Chemical Engineering Sciences, CNRS-ENSIC-INPL, BP 451/54001 Nancy/France (2 aut.)
DT :	Publication en série; Niveau analytique
SO :	AIChE journal; ISSN 0001-1541; Coden AICEAC; Etats-Unis; Da. 2004; Vol. 50; No. 10; Pp. 2604-2612; Bibl. 30 ref.
LA :	Anglais
EA :	For given nominal molar concentrations in complementary functional groups, the common wisdom is that the reaction rate of those attached to large molecules does not exceed that of small molecule analogues. They are at best equal. The difference in reaction kinetics is more pronounced if reactive molecules are so large that they phase-separate, which is often so for polymers. In such cases, complementary functional groups from the two phases can meet and react only at the interfaces. Thus, reaction kinetics of functional groups attached to small molecules has always been taken as the upper bound for those attached to polymers. Here we show that under sufficient mixing, reaction kinetics of two immiscible reactive polymers can be significantly higher than that of small molecule analogues. This phenomenon is attributed to the combined effects of increasing collision probability originated from mixing-induced interfacial area generation, longer relaxation time of reactive polymer chains, and eventually interfacial slip.
CC :	001D07
FD :	Cinétique; Vitesse réaction; Borne supérieure; Mélangeage; Collision; Aire interfaciale; Temps relaxation
ED :	Kinetics; Reaction rate; Upper bound; Mixing; Collision; Interfacial area; Relaxation time
SD :	Cinética; Velocidad reacción; Cota superior; Mezclado; Colisión; Superficie interfacial; Tiempo relajación
LO :	INIST-7678.354000122297390240
ID :	05-0086615

Links to Exploration step

Pascal:05-0086615

Le document en format XML

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<ET>Reaction kinetics of multiphase polymer systems under flow</ET>
<AU>FENG (Lian-Fang); HU (Guo-Hua)</AU>
<AF>State Key Laboratory of Polymer Reaction Engineering, College of Materials Science and Chemical Engineering, Zhejiang University/Hangzhou/Chine (1 aut.); Laboratory of Chemical Engineering Sciences, CNRS-ENSIC-INPL/Nancy/France (1 aut.); Laboratory of Chemical Engineering Sciences, CNRS-ENSIC-INPL, BP 451/54001 Nancy/France (2 aut.)</AF>
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Reaction kinetics of multiphase polymer systems under flow

Reaction kinetics of multiphase polymer systems under flow

Source :

Descripteurs français

English descriptors

Abstract

Notice en format standard (ISO 2709)

Format Inist (serveur)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri