Mechanical properties and nanostructure correlation of condensation-type poly(dimethyl siloxane)/layered silicate hybrids

Vasilakos, SP; Tarantili, PA

dc.contributor.author	Vasilakos, SP	en
dc.contributor.author	Tarantili, PA	en
dc.date.accessioned	2014-03-01T02:11:24Z
dc.date.available	2014-03-01T02:11:24Z
dc.date.issued	2012	en
dc.identifier.issn	00218995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29893
dc.subject	mechanical properties	en
dc.subject	nanocomposites	en
dc.subject	organoclay	en
dc.subject	polysiloxanes	en
dc.subject	structure-property relations	en
dc.subject.other	Cloisite	en
dc.subject.other	End groups	en
dc.subject.other	Filler dispersion	en
dc.subject.other	Initial molecular weight	en
dc.subject.other	Mechanical performance	en
dc.subject.other	Nano-fillers	en
dc.subject.other	Network density	en
dc.subject.other	Organic modification	en
dc.subject.other	Organo-montmorillonite	en
dc.subject.other	Parameter control	en
dc.subject.other	Silicone rubber	en
dc.subject.other	Solvent resistance	en
dc.subject.other	Structure property relation	en
dc.subject.other	Tear resistance	en
dc.subject.other	Weight ratios	en
dc.subject.other	Clay minerals	en
dc.subject.other	Elastomers	en
dc.subject.other	Fillers	en
dc.subject.other	Mechanical testing	en
dc.subject.other	Nanocomposites	en
dc.subject.other	Organic solvents	en
dc.subject.other	Organoclay	en
dc.subject.other	Silicates	en
dc.subject.other	Silicones	en
dc.subject.other	Toluene	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Mechanical properties	en
dc.title	Mechanical properties and nanostructure correlation of condensation-type poly(dimethyl siloxane)/layered silicate hybrids	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/app.36479	en
heal.identifier.secondary	http://dx.doi.org/10.1002/app.36479	en
heal.publicationDate	2012	en
heal.abstract	Composites of silicone rubber reinforced with organomontmorillonite (OMMT) nanoparticles were prepared by direct mixing and characterized in terms of morphology, in correlation with mechanical performance. Two grades of commercial montmorillonite (MMT) with different types of organic modification were studied, namely Cloisite® 20A and Cloisite® 30B. Low, medium, and higher molecular weight PDMS were used as matrices. Using X-ray diffraction analysis, it was shown that OMMT loadings at a weight ratio to resin ranging from 5 to 10 parts per hundred (phr) can produce delamination hybrids. Mechanical testing showed that for OMMT loadings up to 8 phr, the prepared nanocomposites present higher tensile strength, stiffness, and tear resistance with respect to the neat silicone. Improvement of the solvent resistance was also recorded by swelling experiments in toluene, and this behavior of the nanocomposites is consistent with their mechanical properties. The results showed that processing characteristics, as well as the overall reinforcing efficiency of nanofillers, are greatly dependent on the initial molecular weight of the elastomer, because this parameter controls the resulting network density and concentration of polar end groups. The content of organic modification of MMT was also found as an important characteristic for proper filler dispersion. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 Copyright © 2011 Wiley Periodicals, Inc.	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.doi	10.1002/app.36479	en
dc.identifier.volume	125	en
dc.identifier.issue	SUPPL. 1	en
dc.identifier.spage	E548	en
dc.identifier.epage	E560	en