48 KB783 KB33 KB200020242012Esfandiari, AmirhosseinSadeghi, Mohsenletnik:46številka:6str. 695-703ISSN:1580-2949COBISSID:958634URN:URN:NBN:SI:doc-0PN4Q9K8enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeelastomerikalcijev karbonatmehanske lastnostinanotehnologijaThe effects of micro and nano CaCo3 on the rheological and physico/mechanical behavior of an SBS/CaCO3 composite| Vpliv mikro- in nanodelcev CaCO3 na reološko in fizikalno/mehansko vedenje kompozita SBS/CaCO3|Different particle sizes of CaCO3 were used and this was confirmed with the X-ray diffraction method. The nano CaCO3 was added, from mass fraction (w) 1 % to 5 %, in the styrene butadiene styrene elastomer (SBS). Elastomer nanocomposites were compounded on a two-roll mill and molded in a compression-molding machine. The mechanical properties such as the tensile strength, the elongation at fracture, the modulus at 300 % elongation, the hardness, the specific gravity, the swelling index, and the flame retardancy were studied. The results were compared with a commercial CaCO3 (mum) filled SBS. There was an improvement in the properties of the elastomer nanocomposites because of the uniform dispersion of the nano CaCO3 particles in the matrix that intercalates the elastomer chains. Hence, the degree of cross-linking increases multifold in comparison with the commercial CaCO3Uporabljeni so bili delci CaCO3 različne velikosti, potrjeni z metodo rentgenske difrakcije. Elastomeru stiren butadien stiren (SBS) je bilo dodano od 1 % do 5 % masnih deležev (w) nanodelcev CaCO3. Nanokompozitni elastomer jebil izdelan z dvovaljčnim mlinom in ulit na tlačnem stroju. Preizkušene so bile mehanske lastnosti, kot so natezna trdnost, raztezek pri porušitvi, modul pri 300-odstotnem raztezku, trdota, specifična gostota, indeks nabrekanja, zadrževanje širjenja plamena. Rezultati so bili primerjani s komercialnim SBS, polnjenim z mikrodelci CaCO3. Ugotovljeno je bilo izboljšanje lastnosti elastomernega kompozita zaradi enakomerne razpršenosti nanodelcev CaCO3 v osnovi, kar omogoča vrinjenje verig elastomera. Zato je mogoča večkratno povečana stopnja prepletanja v primerjavi s komercialnim CaCO3TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije