Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
CTBN rubber phase precipitation in model epoxy resins
Autore:
Wise, CW; Cook, WD; Goodwin, AA;
Indirizzi:
Monash Univ, Dept Mat Engn, Cooperat Res Ctr Polymers, Clayton, Vic 3168, Australia Monash Univ Clayton Vic Australia 3168 mers, Clayton, Vic 3168, Australia
Titolo Testata:
POLYMER
fascicolo: 12, volume: 41, anno: 2000,
pagine: 4625 - 4633
SICI:
0032-3861(200006)41:12<4625:CRPPIM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIAMINE NETWORK POLYMERS; MOLECULAR RELAXATIONS; CROSSLINK DENSITY; POLYMERIZATION; MECHANISMS; REGION;
Keywords:
epoxy resins; curing; phase precipitation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Cook, WD Monash Univ, Dept Mat Engn, Cooperat Res Ctr Polymers, Clayton, Vic 3168, Australia Monash Univ Clayton Vic Australia 3168 yton, Vic 3168, Australia
Citazione:
C.W. Wise et al., "CTBN rubber phase precipitation in model epoxy resins", POLYMER, 41(12), 2000, pp. 4625-4633

Abstract

This study investigated the precipitation of three types of end-functionalised Liquid rubber (two CTBN and one ATBN) from two homologous series of amine-cured epoxy polymers with variable cross-link density. The CTBN carboxyl endgroups strongly enhanced the curing rate through the impurity catalysis mechanism, however, the amino-terminated ATBN only retarded the reaction,possibly by dilutional effects or owing to changes in the dielectric constant of the reacting medium. The glass transition temperature (T-g) of the epoxy phase was depressed by CTBN rubber dissolved in the epoxy matrix and the T-g of the CTBN rubber was also lowered. The height of the DMTA rubber peak was a linear function of the level of CTBN and suggested that ca. 3% ofthe rubber was dissolved in the cured epoxy matrix. The microstructure of the rubber particles was studied by SEM and related to the kinetics and thermodynamics of phase separation. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 22:52:17