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Titolo:
Sequential interpenetrating polymer networks from bisphenol A based cyanate ester and bimaleimide: Properties of the neat resin and composites
Autore:
Nair, CPR; Francis, T; Vijayan, TM; Krishnan, K;
Indirizzi:
Vikram Sarabhai Space Ctr, Propellant & Special Chem Grp, Trivandrum 695022, Kerala, India Vikram Sarabhai Space Ctr Trivandrum Kerala India 695022 2, Kerala, India
Titolo Testata:
JOURNAL OF APPLIED POLYMER SCIENCE
fascicolo: 11, volume: 74, anno: 1999,
pagine: 2737 - 2746
SICI:
0021-8995(199912)74:11<2737:SIPNFB>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
MECHANICAL-PROPERTIES; THERMAL-BEHAVIOR; TRIAZINE RESINS; MONOMERS; CHEMISTRY; SYSTEMS;
Keywords:
bisphenol A dicyanate; bisphenol bismaleimide; bismaleimide-triazine resins; sequential IPN; network interlinking; cyanatophenyl maleimide;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Nair, CPR Vikram Sarabhai Space Ctr, Propellant & Special Chem Grp, Trivandrum 695022, Kerala, India Vikram Sarabhai Space Ctr Trivandrum Kerala India 695022 India
Citazione:
C.P.R. Nair et al., "Sequential interpenetrating polymer networks from bisphenol A based cyanate ester and bimaleimide: Properties of the neat resin and composites", J APPL POLY, 74(11), 1999, pp. 2737-2746

Abstract

Blends of varying composition of a bisphenol A based cyanate ester-viz., 2,2-bis-(4-cyanatophenyl) propane (BACY)-and a bisphenol A based bismaleimide-viz., 2,2-bis[4-(4-maleimido phenoxy) phenyl] propane (BMIP)-were cured together in a sequential manner to derive bismaleimide-triazine network. polymers. Enhancing the bismaleimide content was conducive for decreasing the tensile properties and improving both the flexural strength and fracture toughness of the cyanate ester-rich neat resin blends. Although DMA analyses of the cured blend indicated a homogeneous network for the cyanate ester dominated compositions, microphase separation occurred on enriching the blendwith the bismaleimide. Addition of bismaleimide did not result in any enhancement in T-g of the blend. Interlinking of the two networks and enhancingcrosslink density through coreaction with 4-cyanatophenyl maleimide impaired both the mechanical and fracture properties of the interpenetrating polymer network. (IPN), although the T-g showed an improvement. Presence of thebismaleimide was conducive for enhancing the mechanical properties of the composites of the cyanate ester rich blend, whereas a higher concentration of it led to poorer mechanical properties due to the formation of a brittleinterphase. The IPNs showed reduced moisture absorption and low dielectricconstant and dissipation factor, the latter properties being independent of the blend composition. (C) 1999 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 05:01:54