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Titolo:
Preparation and characterization of polybenzoxazine-clay immiscible nanocomposite
Autore:
Phiriyawirut, P; Magaraphan, R; Ishida, H;
Indirizzi:
Chulalongkorn Univ, Petr & Petrochem Coll, Bangkok, Thailand ChulalongkornUniv Bangkok Thailand & Petrochem Coll, Bangkok, Thailand Case Western Reserve Univ, Dept Macromol Sci, Cleveland, OH 44106 USA CaseWestern Reserve Univ Cleveland OH USA 44106 Cleveland, OH 44106 USA
Titolo Testata:
MATERIALS RESEARCH INNOVATIONS
fascicolo: 2-3, volume: 4, anno: 2001,
pagine: 187 - 196
SICI:
1432-8917(200101)4:2-3<187:PACOPI>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SILICATE NANOCOMPOSITES; HYBRID;
Keywords:
polybenzoxazine; montmorillonite; clay; nanocomposite; immiscible; delamination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Magaraphan, R Chulalongkorn Univ, Petr & Petrochem Coll, Bangkok, ThailandChulalongkorn Univ Bangkok Thailand ll, Bangkok, Thailand
Citazione:
P. Phiriyawirut et al., "Preparation and characterization of polybenzoxazine-clay immiscible nanocomposite", MAT RES INN, 4(2-3), 2001, pp. 187-196

Abstract

An immiscible polymer-clay nanocomposite has been synthesized consisting of dispersed layers of organically modified montmorillonite (OMOM) in a polybenzoxazine matrix as shown by thermogravitnetry, wide angle x-ray diffraction (WAXD), and transmission electron microscopy. Five small protonated amines showed high ion-exchangeability. The spacing of the silicate layers is strongly dependent on the size or molecular weight of the amine derivative and the solvent type. Binary solvents (5% methanol in toluene) exhibited superior ability to swell OMOM. Finally, WAXD results revealed that the silicate layer expansion of all poly benzoxazine-OMOM nanocomposites prepared from either melt or solution methods were similar, about 4 Angstrom increment. This was correlated with TEM results showing the aggregation of silicate layers indicating that all prepared OMOM are immiscible with the polymer matrix. These results suggested that the compatibility between amine modifying agents and benzoxazine played the most important role for the characteristics of the nanocomposite.

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Documento generato il 11/07/20 alle ore 17:05:03