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http://dx.doi.org/10.7317/pk.2015.39.2.210

Study on Reaction Behavior of Rigid Polyurethane Foam with Various Types and Contents of Gelling Catalysts  

Eom, Se Yeon (Department of Polymer Science and Engineering, Chungnam National University)
Lee, Hyeong Il (Department of Polymer Science and Engineering, Chungnam National University)
Lee, Kee Yoon (Department of Polymer Science and Engineering, Chungnam National University)
Publication Information
Polymer(Korea) / v.39, no.2, 2015 , pp. 210-218 More about this Journal
Abstract
The reaction behavior of rigid polyurethane foams were studied on the effects of gelling catalysts of amine type, such as; dimethylcyclohexyl amine (DMCHA) and of potassium type, such as; potassium octoate (PO). Rigid polyurethane foams were provided with polymeric 4,4'-diphenylmethane diisocyanate, polyester polyol, silicone surfactant, blowing agent and a few gelling catalysts. As the contents of catalyst, DMCHA increased from 0 to 2.0 g, the reaction time decreased from ca. 330 to ca. 35 sec and due to the exothermic reaction, the maximum temperature increased from ca. 217 to ca. $234^{\circ}C$, respectively. As the contents of PO increased from 0 to 2.5 g, the reaction time decreased from ca. 79 to ca. 38 sec and the maximum temperature increased from ca. 182 to ca. $271^{\circ}C$, respectively. The kinetic parameters were calculated and the conversions were based on the temperature rising method of adiabatic process. As the content of DMCHA increased, the rate constant $k_0$ increased. But in the case of PO catalyst, $k_0$ did hardly depend upon its amount, and showed us similar reaction rate constants.
Keywords
rigid polyurethane foam; temperature rising method of adiabatic process; gelling catalyst;
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