Reticulation of aqueous polyurethane systems controlled by DSC method
Апстракт
The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT(R) XC- 6212) and the highly selective manganese catalyst, the complex Mn(III)diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature of the examination ranged from 50 degrees C to 450 degrees C with the heat rate of 0.5 degrees C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective cat...alysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst.
Кључне речи:
aqueous polyurethanes / selective catalyst / differential scanning calorimetry / pseudo activation energyИзвор:
Sensors, 2006, 6, 5, 536-545Издавач:
- MDPI, BASEL
Финансирање / пројекти:
- Нове методе и технике за сепарацију и специјацију хемијских елемената у траговима, органских супстанци и радионуклида и идентификацију њихових извора (RS-MESTD-MPN2006-2010-142039)
DOI: 10.3390/s6050536
ISSN: 1424-8220
WoS: 000238803600007
Scopus: 2-s2.0-33947400047
Институција/група
Poljoprivredni fakultetTY - JOUR AU - Cakić, Suzana AU - Lačnjevac, Časlav AU - Rajković, Miloš AU - Rasković, Ljiljana AU - Stamenković, Jakov PY - 2006 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/1348 AB - The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT(R) XC- 6212) and the highly selective manganese catalyst, the complex Mn(III)diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature of the examination ranged from 50 degrees C to 450 degrees C with the heat rate of 0.5 degrees C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst. PB - MDPI, BASEL T2 - Sensors T1 - Reticulation of aqueous polyurethane systems controlled by DSC method EP - 545 IS - 5 SP - 536 VL - 6 DO - 10.3390/s6050536 ER -
@article{ author = "Cakić, Suzana and Lačnjevac, Časlav and Rajković, Miloš and Rasković, Ljiljana and Stamenković, Jakov", year = "2006", abstract = "The DSC method has been employed to monitor the kinetics of reticulation of aqueous polyurethane systems without catalysts, and with the commercial catalyst of zirconium (CAT(R) XC- 6212) and the highly selective manganese catalyst, the complex Mn(III)diacetylacetonemaleinate (MAM). Among the polyol components, the acrylic emulsions were used for reticulation in this research, and as suitable reticulation agents the water emulsible aliphatic polyisocyanates based on hexamethylendoisocyanate with the different contents of NCO-groups were employed. On the basis of DSC analysis, applying the methods of Kissinger, Freeman-Carroll and Crane-Ellerstein the pseudo kinetic parameters of the reticulation reaction of aqueous systems were determined. The temperature of the examination ranged from 50 degrees C to 450 degrees C with the heat rate of 0.5 degrees C/min. The reduction of the activation energy and the increase of the standard deviation indicate the catalytic action of the selective catalysts of zirconium and manganese. The impact of the catalysts on the reduction of the activation energy is the strongest when using the catalysts of manganese and applying all the three afore-said methods. The least aberrations among the stated methods in defining the kinetic parameters were obtained by using the manganese catalyst.", publisher = "MDPI, BASEL", journal = "Sensors", title = "Reticulation of aqueous polyurethane systems controlled by DSC method", pages = "545-536", number = "5", volume = "6", doi = "10.3390/s6050536" }
Cakić, S., Lačnjevac, Č., Rajković, M., Rasković, L.,& Stamenković, J.. (2006). Reticulation of aqueous polyurethane systems controlled by DSC method. in Sensors MDPI, BASEL., 6(5), 536-545. https://doi.org/10.3390/s6050536
Cakić S, Lačnjevac Č, Rajković M, Rasković L, Stamenković J. Reticulation of aqueous polyurethane systems controlled by DSC method. in Sensors. 2006;6(5):536-545. doi:10.3390/s6050536 .
Cakić, Suzana, Lačnjevac, Časlav, Rajković, Miloš, Rasković, Ljiljana, Stamenković, Jakov, "Reticulation of aqueous polyurethane systems controlled by DSC method" in Sensors, 6, no. 5 (2006):536-545, https://doi.org/10.3390/s6050536 . .