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Termička stabilnost segmentiranih poliuretanskih elastomera ojačanih česticama gline
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SYSNO ASEP 0342403 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Termička stabilnost segmentiranih poliuretanskih elastomera ojačanih česticama gline Title Thermal stability of segmented polyurethane elastomers reinforced by clay particles Author(s) Pavličevic, J. (RS)
Budinski-Simendic, J. (RS)
Szecsenyi, K. M. (RS)
Lazić, N. (RS)
Špírková, Milena (UMCH-V) RID, ORCID
Strachota, Adam (UMCH-V) RID, ORCIDSource Title Hemijska industrija - ISSN 0367-598X
Roč. 63, č. 6 (2009), s. 621-628Number of pages 8 s. Language hbs - srbochorvatština Country CS - CS Keywords segmented polyurethanes ; thermal stability ; elastomers Subject RIV CD - Macromolecular Chemistry CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000276140700004 DOI 10.2298/HEMIND0906621P Annotation Cilj je bio ispitivanje uticaja nanočestica gline na toplotna svojstva segmentiranih poliuretana dobijenih reakcijom polikarbonatnog diola, heksametilen-diizocijanata i produživača lanca 1,4-butandiola. Organski modifikovane čestice montmorilonita i bentonita su korišćene kao punioci za ojačanje elastomera. Struktura dobijenih materijala je varirana ili promenom sadržaja produživača lanaca ili tipom polikarbonatnog diola. Odnos OH grupa iz diolne komponente i OH grupa iz produživača lanca (R) bio je 1 ili 10. Toplotna svojstva materijala su određena korišćenjem modulovane diferencijalne skenirajuće kalorimetrije (MDSC). Termička degradacija je praćena simultanom diferencijalnom skenirajućom kalorimetrijom i termogravimetrijom koja istovremeno prati i promenu protoka toplote i gubitka mase.Temperatura prelaska u staklasto stanje,Tg,mekih segmenata elastomera iznosila je oko –33°C.Na osnovu termogravimetrijskih rezultata, ustanovljeno je da su dobijeni materijali veoma stabilni do 300°C. Description in English The aim of this work was to determine the influence of clay nanopartides on thermal properties of segmented polyurethanes based on hexamethylene-diisocyanate, aliphatic polycarbonate diol and 1,4-butanediol as chain extender. The organically modified particles of montmorillonite and bentonite were used as reinforcing fillers. The structure of elastomeric materials was varied either by diol type or chain extender content. The ratio of OH groups from diol and chain extender (R) was either 1 or 10. Thermal properties of prepared materials were determined using modulated differential scanning calorimetry (MDSC). Thermal stability of obtained elastomers has been studied by simultaneously thermogravimetry coupled with DSC. The glass transition temperature, Tg, of soft segments for all investigated samples was about 33 degrees C. On the basis of DTG results, it was concluded that obtained materials were very stable up to 300 degrees C. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2011
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