dc.contributor.authorKwek, Darien Yu De
dc.date.accessioned2019-05-15T12:58:38Z
dc.date.available2019-05-15T12:58:38Z
dc.date.issued2019
dc.identifier.urihttp://hdl.handle.net/10356/77205
dc.description.abstractThis study investigated the nucleation efficiency of Cloisite15 nanoclay in a nanocomposite based on a polyethylene matrix and the usage of supercritical carbon dioxide as the physical blowing agent in an extrusion foaming process. A Cloisite15 masterbatch was successfully produced and the structural and molecular stability of the organo-surfactant in Cloiste15 was evaluated using the thermogravimetric analyser. The degree of intercalation/exfoliation between the polyethylene chains and nanoclay platelets were characterized using X-Ray diffraction and scanning electron microscopy techniques. A bimodal cell structure was obtained upon the foaming of the nanocomposite which was likely due to the simultaneous occurrence of both homogeneous and heterogeneous nucleation as well as the contrasting CO2 affinity of polyethylene and Cloisite15 respectively. Lastly, the appearance of micro voids in the polyethylene/nanoclay nanocomposite foams was presumably due to the extensional stresses experienced by the melt during the extrusion process which could have detached intercalated polyethylene chains between the nanoclay platelets.en_US
dc.format.extent51 p.en_US
dc.language.isoenen_US
dc.rightsNanyang Technological University
dc.subjectDRNTU::Engineering::Nanotechnologyen_US
dc.titleExtrusion foaming of polyethylene/nanoclay composites with supercritical carbon dioxideen_US
dc.typeFinal Year Project (FYP)en_US
dc.contributor.supervisorChen Zhongen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.description.degreeBachelor of Engineering (Materials Engineering)en_US
dc.contributor.organizationA*STAR Singapore Institute of Manufacturing Technologyen_US
dc.contributor.supervisor2Lau Soo Khimen_US


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