Characterization of expanded polystyrene and its composites by supercritical carbon dioxide foaming approach

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversity of Caxias do Sul (UCS)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorNeves, Roberta Motta-
Autor(es): dc.creatorLopes, Kirk Silveira-
Autor(es): dc.creatorLazzari, Lídia Kunz-
Autor(es): dc.creatorMonticeli, Francisco Maciel [UNESP]-
Autor(es): dc.creatorZattera, Ademir José-
Data de aceite: dc.date.accessioned2022-02-22T00:46:07Z-
Data de disponibilização: dc.date.available2022-02-22T00:46:07Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s10934-021-01062-8-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/206082-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/206082-
Descrição: dc.descriptionSupercritical carbon dioxide (scCO2) has been used as a physical blowing agent to produce polymer expanded materials. Firstly, a statistic study was performed to determine the neat polystyrene (PS) expansion parameters, using the ANOVA and response desirability approach. The results suggested that the optimal parameters are 120 °C (temperature), 2500 psi/17.23 MPa (pressure), and 2 h (residence time). Secondly, defibrillated curauá fibers (CF) were used as reinforcement in the PS matrix, in three different proportions (1.0, 2.5, and 5.0% (w/w)), to produced expanded composites. The results showed that CF acted as a nucleating agent, facilitating scCO2 to sip into the composite due to the reinforcement/matrix interface. The expanded composites were characterized by SEM, apparent density, cell population density, void volume fraction, and mechanical properties by the compression test, water uptake, dye absorption and, water contact angle (WCA). CF incorporation in the composite increased the compressive strength value and modified the expanded composite final morphology, decreasing the cell size and increasing void content and density. The PS/CF 5.0% sample showed higher water and organic dye absorption and the addition of CF on the expanded composite slightly decrease WCA.-
Descrição: dc.descriptionPostgraduate Program in Engineering of Processes and Technologies (PGEPROTEC) University of Caxias do Sul (UCS)-
Descrição: dc.descriptionDepartment of Materials and Technology Fatigue and Aeronautic Materials Research Group School of Engineering Sao Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Materials and Technology Fatigue and Aeronautic Materials Research Group School of Engineering Sao Paulo State University (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationJournal of Porous Materials-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectComposites-
Palavras-chave: dc.subjectCurauá fibers-
Palavras-chave: dc.subjectPolystyrene-
Palavras-chave: dc.subjectSupercritical carbon dioxide-
Título: dc.titleCharacterization of expanded polystyrene and its composites by supercritical carbon dioxide foaming approach-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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