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Microcellular foaming of amorphous polymers in a supercritical CO2 batch process: Effect of philic-additives and process conditions on microstructure

dc.rights.licenseopen
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
dc.contributor.authorREGLERO RUIZ, José Antonio
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 1 LCPO : Polymerization Catalyses & Engineering
dc.contributor.authorDUMON, Michel
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2010
dc.identifier.issn1790-4439
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/20357
dc.description.abstractEnMicrocellular foaming of commodity amorphous polymers, Polymethylmethacrylate (PMMA), and Polystyrene (PS) was studied in supercritical CO 2 via a one-step process in the presence of several types of additives able to change their foaming behaviour and therefore the porous structures. Additives such as diblock copolymers (styrene-co-methylmethacrylate SM) or triblock (styrene-co-butadiene-co-methylmethacrylate SBM, methylmethacrylate-co-butylacrylate-co-methylmethacrylate MAM) terpolymers, core-shell particles (methylmethacrylate styrene) were added to PS or PMMA by extrusion. They showed advantages compared to classical PS-PMMA polymer blends in terms of cell size control and reduction of cell size. Foaming is carried out on bulk injection molded samples which were saturated under high pressures of CO 2 (300 bars) at different temperatures (25°C to 80°C) and different depressurization rates (from 150bar/min to 12bar/min). Then very distinct cellular structures and densities were controlled by varying either the additive type or the foaming conditions, using different foaming temperatures and foaming times. Cell sizes are ranging from 0.2 μm to 200 μm, and densities from 0.30 g/cm3 to 1 g/cm 3 in the polymers considered. It was found that the some additives, well dispersed inside the polymer matrix, play an important role as nucleating agents, reducing drastically the average cell size, and improving the foaming process.
dc.language.isoen
dc.publisherADCOTEC
dc.subject.enAmorphous polymers
dc.subject.enBatch process
dc.subject.enCell size
dc.subject.enCellular structure
dc.subject.enCore-shell particle
dc.subject.enDepressurization rate
dc.subject.enFoaming process
dc.subject.enFoaming temperature
dc.subject.enHigh pressure
dc.subject.enMethyl methacrylates
dc.subject.enMicrocellular foaming
dc.subject.enNucleating agents
dc.subject.enOne-step process
dc.subject.enPorous structures
dc.subject.enProcess condition
dc.subject.enSupercritical CO
dc.subject.enSupercritical CO2
dc.subject.enTriblocks
dc.subject.enWell-dispersed
dc.title.enMicrocellular foaming of amorphous polymers in a supercritical CO2 batch process: Effect of philic-additives and process conditions on microstructure
dc.typeArticle de revue
dc.subject.halChimie/Polymères
bordeaux.journalJournal of Nanostructured Polymers and Nanocomposites
bordeaux.page54-60
bordeaux.volume6
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.issue2
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-00950601
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00950601v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Nanostructured%20Polymers%20and%20Nanocomposites&rft.date=2010&rft.volume=6&rft.issue=2&rft.spage=54-60&rft.epage=54-60&rft.eissn=1790-4439&rft.issn=1790-4439&rft.au=REGLERO%20RUIZ,%20Jos%C3%A9%20Antonio&DUMON,%20Michel&rft.genre=article


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