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- W1514637974 abstract "Micron-sized polymer particles, due to their susceptibility to different chemical modification and excellent mechanical properties, have been widely used in chemical analysis and biotechnology, such as additives in coating and paint, ink products, chromatographic support, and electronic packaging technology, etc. In addition to functionalities, mechanical properties of polymer particles under a large deformation are of crucial importance to different applications. However, due to small volume, spherical geometry and large deformation, mechanical characterization of individual micron-sized particles are difficult and challenges the existing experimental methodologies. In this work, micron-sized polystyrene crosslinked with divinylbenzene (PS-co-DVB) particles have been prepared by seeded polymerization based multistep swelling process, known as Ugelstad method. Three groups of PS-co-DVB particles have identical size and different crosslink density. The SEM observation has proven the perfectly spherical geometry and highly uniform size of particles. The mechanical response of individual particles has been investigated by means of nanoindentation-based flat punch technique. The crosslink density of particles and the loading rate during compression have been taken into account. The results show that particle deformation and fracture experience a ductile-to-brittle transition when crosslink density increases. A faster compression on the strongly crosslinked particles induces more brittle behaviour." @default.
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- W1514637974 date "2013-02-22" @default.
- W1514637974 modified "2023-09-23" @default.
- W1514637974 title "Deformation and Fracture of Crosslinked Polystyrene particles" @default.
- W1514637974 hasPublicationYear "2013" @default.
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