Počet záznamů: 1

Preparation and characterization of thermoplastic water-borne polycarbonate-based polyurethane dispersions and cast films

SYSNO ASEP	0446730
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Preparation and characterization of thermoplastic water-borne polycarbonate-based polyurethane dispersions and cast films
Tvůrce(i)	Serkis, Magdalena (UMCH-V)_RID Poreba, Rafal (UMCH-V)_{RID, ORCID} Hodan, Jiří (UMCH-V) Kredatusová, Jana (UMCH-V)_RID Špírková, Milena (UMCH-V)_{RID, ORCID}
Zdroj.dok.	Journal of Applied Polymer Science. - : Wiley - ISSN 0021-8995 Roč. 132, č. 42 (2015), 42672_1-42672_14
Poč.str.	14 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	films ; microscopy ; nanoparticles
Vědní obor RIV	CD - Makromolekulární chemie
CEP	GA13-06700S GA ČR - Grantová agentura ČR
Institucionální podpora	UMCH-V - RVO:61389013
UT WOS	000362707600019
EID SCOPUS	84938743199
DOI	10.1002/app.42672
Anotace	Stable water-borne polyurethane dispersions (PUDs) were prepared from bifunctional aliphatic polycarbonate-based macrodiol, 2,2-bis(hydroxymethyl)propionic acid (DMPA), 1,6-diisocyanatohexane, 1,4-butanediol (BD), and triethylamine. Water-borne dispersion particles are thus solely formed from self-assembled linear PU chains. Both PUDs and PUD-based films were characterized with regards to the concentration of DMPA (ionic species content) and BD (hard-segment content). Average particle size of PUDs decreased and their long-term stability increased with increasing DMPA and decreasing BD concentration. Functional properties of cast films made from PUDs are substantially influenced by the character of the original colloidal particle dispersions. The swelling behavior of the films, their surface morphology, and mechanical properties are more influenced by DMPA than BD contents. At DMPA concentrations higher than 0.2 mmol g−1 of the solid mass of polyurethane, distinct self-organization of individual nanoparticles into fibril-like structures was detected by atomic force microscopy and scanning electron microscopy. PU films made from PUD containing high BD as well as high DMPA concentrations have the best utility properties namely sufficient tensile properties and a very low swelling ability.
Pracoviště	Ústav makromolekulární chemie
Kontakt	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Rok sběru	2016

Počet záznamů: 1