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dc.contributor.authorCunha, Fernanda Oliveira Vieira dapt_BR
dc.contributor.authorMelo, Diogo Henrique Roeslerpt_BR
dc.contributor.authorVeronese, Vinicius Bassanesipt_BR
dc.contributor.authorForte, Maria Madalena de Camargopt_BR
dc.date.accessioned2010-04-16T09:12:01Zpt_BR
dc.date.issued2004pt_BR
dc.identifier.issn1516-1439pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/19877pt_BR
dc.description.abstractIn this work was employed a 23 factorial experiment design to evaluate the castor oil polyurethane- poly(methyl methacrylate) semi-IPN synthesis. The reaction parameters used as independent variables were NCO/OH molar ratio, polyurethane polymerization time and methyl methacrylate (MMA) content. The semi-IPNs were cured over 28 h using two thermal treatments. The polymers were characterized by infrared and Raman spectroscopy, thermal analysis and swelling profiles in n-hexane. The glass transition temperature (Tg) and the swelling were more affect by the NCO/OH molar ratio variation. The semi-IPNs showed Tg from - 27 to - 6 °C and the swelling range was from 3 to 22%, according to the crosslink density. The IPN mechanical properties were dependent on the cure temperature and MMA content in it. Lower elastic modulus values were observed in IPNs cured at room temperature.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMaterials research : revista ibero-americana de materiais. São Carlos, SP. vol. 7, no. 4 (Oct./Dec. 2004), p. 539-543pt_BR
dc.rightsOpen Accessen
dc.subjectCastor oilen
dc.subjectPolímerospt_BR
dc.subjectSemi-IPNen
dc.subjectExperimental designen
dc.subjectPoly (methyl methacrylate)en
dc.titleStudy of castor oil polyurethane - poly (methyl methacrylate) semi-interpenetrating polymer network (SIPN) reaction parameters using a 2³ factorial experimental designpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000448635pt_BR
dc.type.originNacionalpt_BR


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