1571. Polypropylene blends with m-EPR copolymers : mechanical and rheological propertiesIztok Švab, Anđela Pustak, Matjaž Denac, Andrijana Sever Škapin, Mirela Leskovac, Vojko Musil, Ivan Šmit, 2018, original scientific article Abstract: The effects of two metallocene ethylene-propylene-based elastomers (m-EPR1 and m-EPR2) differing in molecular mass and viscosity on mechanical, rheological and interfacial properties were compared. The m-EPR elastomers were added to iPP in 2.5, 5, 10, 15, and 20 vol.%. Torque values, elongation at break and impact strength measured of the iPP/m-EPR1 blends were higher than the iPP/m-EPR2 blends due to higher molten viscosity of m-EPR1 than m-EPR2 copolymer. Slight differences in Young moduli as well as in tensile strength at yield and at break might indicate that tensile properties of iPP/m-EPR blends were not significantly affected by difference in viscosity or molecular mass, miscibility and spherulite size. Optimization diagrams indicated the metallocene m-EPR copolymers are efficient impact modifiers for polypropylene and showed good balancing of mechanical properties in iPP/m-EPR blends.
Keywords: isotactic polypropylene, metallocene ethylene-propylene-based elastomers, blend, mechanical properties, adhesion parameters
Published in DiRROS: 13.12.2023; Views: 342; Downloads: 163
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1577. "Kruha in dela" : o reševanju socialnih vprašanj v Istri in Trstu 19. stoletjaUrška Bratož, 2022, review article Abstract: Članek skuša predstaviti nekatere značilnosti habsburškega socialnega ‘sistema’ na območju Istre v 19. stoletju, kakor jih je mogoče zaznati predvsem skozi perspektivo delovne (ne)zmožnosti kot ključnega kriterija za ugotavljanje upravičenosti do socialne pomoči. Avtorica opazuje naslavljanje socialnih vprašanj v tem času, pri čemer se kot eden temeljnih spodbujevalcev socialnih podpor – zlasti v primerih starosti, bolezni in brezposelnosti – izkazujejo predvsem krizne okoliščine. Pozornost je posvečena tudi vprašanju financiranja dobrodelnosti, ki je v večji meri slonelo na posameznih občinah, obenem pa tudi pomembnemu segmentu ubožnih fondov – zasebni dobrodelnosti, ki jo je mogoče razumeti v kontekstu meščanske etike.
Published in DiRROS: 12.12.2023; Views: 326; Downloads: 118
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1578. Tehnične smernice za ohranjanje in rabo genskih virov : hrasti = Quercus spp.Hojka Kraigher, Mojca Bogovič, Marjana Westergren, 2010, professional article Keywords: genski viri, drevesne vrste, tehnične smernice, hrast, Quercus spp., Slovenija
Published in DiRROS: 12.12.2023; Views: 425; Downloads: 82
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1579. Tehnične smernice za ohranjanje in rabo genskih virov : dob in graden = Quercus robur/Quercus petraeaAlexis Ducousso, Sandor Bordacs, 2010, professional article Keywords: genski viri, drevesne vrste, tehnične smernice, dob, Quercus robur L., graden, Quercus petraea (Matt.) Liebl.
Published in DiRROS: 12.12.2023; Views: 426; Downloads: 119
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1580. Vojna, lakota in bolezen : po sledeh španske gripe v KopruUrška Bratož, 2020, original scientific article Keywords: socialna zgodovina, epidemije, Koper, Trst, prva svetovna vojna, gripa, prehrana, civilno prebivalstvo, Avstro-Ogrska, Kraljevina Italija
Published in DiRROS: 12.12.2023; Views: 289; Downloads: 145
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