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Interactions in a blend of two polymers greatly differing in glass transition temperature
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SYSNO ASEP 0360789 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Interactions in a blend of two polymers greatly differing in glass transition temperature Tvůrce(i) Kratochvíl, Jaroslav (UMCH-V) RID
Šturcová, Adriana (UMCH-V) RID
Sikora, Antonín (UMCH-V) RID
Dybal, Jiří (UMCH-V) RID, ORCIDZdroj.dok. Journal of Polymer Science. Part B, Polymer Physics . - : Wiley - ISSN 0887-6266
Roč. 49, č. 14 (2011), s. 1031-1040Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova differential scanning calorimetry (DSC) ; fouriertransform infrared spectroscopy (FT-IR) ; glass transition temperature Vědní obor RIV CD - Makromolekulární chemie CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000291613500005 DOI 10.1002/polb.22272 Anotace Blends of poly(N-methyldodecano-12-lactam) PMDL with poly(4-vinyphenol) PVPh have been studied by the DSC and ATR FTIR methods. The difference in glass transition temperature Tg between the components is 206 ºC. A single composition-dependent Tg suggests miscibility of the system, that is, homogeneity on the scale of about 10 nm. The Schneider's equation applied separately to low- and high-PVPh regions provides good agreement with experiment; the calculated curves cross at the point of PVPh weight fraction 0.27. In the low-PVPh region, the analysis indicates weak interactions and strong involvement of conformational entropy. In the high-PVPh region, strong specific interactions predominate and entropic effects are suppressed. According to ATR FTIR, hydrogen bonds between PVPh as proton donor and PMDL as proton acceptor induce miscibility in blends of higher PVPh content (above about 0.28 weight fraction). In low-PVPh blends, it is conformational entropy that enables intimate intermolecular mixing. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2012
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