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Določevanje zaostalih napetosti pri brizganju amorfnih polimerovHuskić, Miroslav ...Pri amorfnih prozornih materialih, kot so polimetil metakrilat (PMMA), akrilonitril butadien stiren (ABS) in polikarbonat (PC) se pogosto pojavljajo vidne napake v obliki mikrorazpok. Le te ... najpogosteje nastanejo po kontaktu izdelkov z detergenti ali alkoholnimi raztopinami. Napake lahko preprečimo tako, da izdelek segrejemo na določeno temperaturo, ki je blizu temperature steklastega prehoda materiala. Kolikšne so te napetosti, na katero temperaturo je potrebno material segreti, in za koliko časa, pa je v glavnem neznanka. Nabrizgali smo epruvete za določevanje mehanskih lastnosti iz polikarbonata, pri čemer smo spreminjali temperaturo orodja (50-80 °C). Vzorcem smo določili mehanske (natezne in upogibne), termične (DSC) in termomehanske (DMA) lastnosti. Ostanek epruvet smo temperirali pri različnih temperaturah (80-130 °C) in različnih časih (1 h in 3 h). Po temperiranju smo ponovno izvedli karakterizacijo. Napetosti v materialu vplivajo na mehanske lastnosti. Zvišajo elastični in upogibni modul ter zarezno žilavost, znižajo pa trdnost. Napetosti v materialu lahko zaenkrat kakovostno določamo z DMA, kjer se kažejo v višjih vrednostih modula izgub in faktorja dušenja (tan delta) pri temperaturah pod steklastim prehodom. Rezultati bodo pokazali, da je s prikazanim postopkom možno reševati industrijske težave s pomočjo uporabe naprednih analiznih metod.Source: Vir znanja in izkušenj za stroko : zbornik foruma : Portorož, 21. in 22. junij 2021 : [12. industrijski forum IRT] (2021, str. 25-28)Type of material - conference contribution ; adult, seriousPublish date - 2021Language - slovenianCOBISS.SI-ID - 71225859
Author
Huskić, Miroslav |
Rozman, Tamara, 1994- |
Nardin, Blaž |
Krebelj, Kristjan |
Kusić, Dragan
Topics
polimeri |
polikarbonat |
DMA |
mehanske lastnosti
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Huskić, Miroslav | 10692 |
Rozman, Tamara, 1994- | 52195 |
Nardin, Blaž | 16005 |
Krebelj, Kristjan | 34674 |
Kusić, Dragan | 32596 |
Source: Personal bibliographies
and: SICRIS
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