Preparation of polystyrene–polyisoprene core–shell nanoparticles for reinforcement of elastomers |
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Authors: | Ming Lu Bo He Liansheng Wang Wen Ge Qiuyu Lu Yakang Liu Liqun Zhang |
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Affiliation: | 1. National Pharmaceutical Engineering and Research Center, China State Institute of Pharmaceutical Industry, Shanghai 201203, China;2. School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China;1. Department of Mechanical and Materials Engineering, The University of Western Ontario, London, Ontario, N6A 5B9, Canada;2. Department of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, PR China |
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Abstract: | Latex-formed core–shell nanoparticles composed of cross-linked polystyrene (PS) core and polyisoprene (PI) shell were successfully synthesized by means of a two-stage emulsion polymerization. The PS core possessed a Z-average diameter of 50.3 nm, and the PS–PI particles took a spherical shape with a Z-average size of 50–70 nm in diameter. Shell thickness was controlled by varying isoprene loading. Necessary interphase interactions between the core and shell domains were also achieved by grafting and swelling polymerization. Latex compounding method was employed to prepare the filled elastomer compounds. As expected, the PS–PI core–shell nanoparticles exhibited excellent reinforcement to elastomeric matrix, enhancing the tensile strength of the styrene–butadiene rubber by approximately 400%. The lower density, better interfacial interactions, and latex compounding process would benefit the PS–PI nanoparticles reinforced elastomer nanocomposites in energy saving. |
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