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The flame retardant, mechanical properties and thermal conductivity of polymer nanocomposites

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dc.contributor.advisor Rafailovich, Miriam en_US
dc.contributor.author LI, JIE en_US
dc.contributor.other Department of Materials Science and Engineering en_US
dc.date.accessioned 2017-09-20T16:42:29Z
dc.date.available 2017-09-20T16:42:29Z
dc.date.issued 2017-05-01 en_US
dc.identifier.uri http://hdl.handle.net/11401/76147 en_US
dc.description 52 pg. en_US
dc.description.abstract Nanoparticles are great additives to the flame retardant and thermal properties of the polymers, however, they generally have some disadvantages on the mechanical properties. The mixing of polymers and nano-fillers such as Cloisite clays, melamine polyphosphate, molybdenum disulfide and graphene are mostly physical reactions between them and do not have chemical reactions during blending. And well dispersion is necessary to increase the conductive pathways, meanwhile, to reduce the loss of mechanical properties. Some of them are used for enhancing the self-extinguishment of PLA, which can form charring layer covered on the surface of samples to hinder the burning process. Generally, the better the nano-fillers disperse in the polymer matrix, the easier the material will intumesce and form charring layer during combustion, and on the other hand, the lower loss of mechanical properties the composite has. Besides, graphene is always applied to improve the thermal conductivity of polymers because of its excellent thermal conductivity. And the mechanism of how to enhance this physical property has been discovered in the whole research. In this study, we focused on the most popular polymers like polypropylene (PP), polystyrene (PS), polylactic acid (PLA) and poly (methyl methacrylate) (PMMA). And the nanoparticles we used are Closites clays, melamine polyphosphate (MPP), molybdenum disulfide (MoS2), graphene (GNPs), Ce-RDP and C-RDP. The last two particles were general additives cellulose and Closites clay sodium coated by RDP, respectively. We successfully obtained some blending materials which have excellent flame retardancy, however, the mechanical properties like impact and tensile had reduced more or less tested by Izod impact tests and tensile testing. In this paper, we also determined that graphene played an important role in improving the thermal conductivity of PP, PS and their immiscible blending with other polymers. And there were many factors like the degree of crystallinity of polymer matrices, the similarity of polarization between graphene and polymers, the mixing time and temperature, affect the rate of thermal conductivity enhancement to some extent. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Materials Science en_US
dc.subject.other Flame retardant, PLA, Thermal conductivity en_US
dc.title The flame retardant, mechanical properties and thermal conductivity of polymer nanocomposites en_US
dc.type Thesis en_US
dc.mimetype Application/PDF en_US
dc.contributor.committeemember Sokolov, Jonathan en_US
dc.contributor.committeemember Kim, Tae Jin. en_US

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