Browsing Science (Faculty of) by Author "Park, Chul B."
Now showing items 1-11 of 11
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Adsorption of surface-modified silica nanoparticles to the interface of melt poly (lactic acid) and supercritical carbon dioxide
Thompson, R.B.; Park, Chul B.; Chen, P.; Jeddi, K.; Sarikhani, K. (ACS Publications, 2015-04-28)With the purpose of fabricating polymer nanocomposite foams and preventing coalescence in foaming processes, the interfacial tension of poly (lactic acid) (PLA) -silica composites is investigated in this work. Synthesized ... -
Application of a constant hole volume Sanchez–Lacombe equation of state to mixtures relevant to polymeric foaming
Park, Chul B.; von Konigslow, Kier; Thompson, Russell B. (Royal Society of Chemistry, 2018)A variant of the Sanchez–Lacombe equation of state is applied to several polymers, blowing agents, and saturated mixtures of interest to the polymer foaming industry. These are low-density polyethylene– carbon dioxide and ... -
Effect of pressure and temperature on interfacial tension of poly lactic acid melt in supercritical carbon dioxide
Sarikhani, K.; Jeddi, K.; Thompson, R.B.; Park, Chul B.; Chen, P. (Elsevier, 2015-04-11)The interfacial tension of poly lactic acid (PLA) melt is measured in supercritical carbon dioxide (CO2) at the temperature range of 143 °C to 168 °C and CO2 pressures up to 2000 psi, using Axisymmetric Drop Shape Analysis ... -
Effect of Temperature and Pressure on Surface Tension of Polystyrene in Supercritical Carbon Dioxide
Thompson, Russell B.; Park, H.; Lanson, N.; Tzoganakis, C.; Park, Chul B.; Chen, P. (ACS Publications, 2007-02-15)The surface tension of polymers in a supercritical fluid is one of the most important physicochemical parameters in many engineering processes, such as microcellular foaming where the surface tension between a polymer melt ... -
Effect of well-dispersed surface-modified silica nanoparticles on crystallization behavior of poly (lactic acid) under compressed carbon dioxide
Sarikhani, K.; Nasseri, R.; Lotocki, V.; Thompson, Russell B.; Park, Chul B.; Chen, Pu (Elsevier, 2016)In this work, the crystallization behavior of poly (lactic acid) (PLA)/amine-modified silica nano- composites at different loadings of amine-modified silica (1, 2, and 8 wt %) under isothermal, non- isothermal, and isothermal ... -
Evaluating Characteristic Parameters for Carbon Dioxide in the Sanchez−Lacombe Equation of State
von Konigslow, Kier; Park, Chul B.; Thompson, Russell B. (American Chemical Society, 2017)For many different pure substances, large numbers of competing characteristic parameter sets exist in the literature for the Sanchez−Lacombe equation of state. This is due in part to differing research requirements or ... -
Maximal cell density predictions for compressible polymer foams
Thompson, Russell B.; Kim, Yeongyoon; Park, Chul B.; Chen, P. (Elsevier, 2012-12-05)Thermodynamic upper bounds for polymer foam cell densities are predicted using compressible selfconsistent field theory. It is found that the incompressible limit always gives the highest, and therefore ultimate, upper ... -
Origins of the failure of classical nucleation theory for nanocellular polymer foams
Thompson, Russell B.; Kim, Yeongyoon; Park, Chul B.; Chen, P. (RSC publishing, 2011-07-06)Relative nucleation rates for fluid bubbles of nanometre dimensions in polymer matrices are calculated using both classical nucleation theory and self-consistent field theory. An identical model is used for both calculations ... -
Reduction of polymer surface tension by crystallized polymer nanoparticles
Thompson, Russell; Park, Chul B.; Chen, P. (AIP Publishing, 2010-10-14)Self-consistent field theory is applied to investigate the effects of crystallized polymer nanoparticles on polymer surface tension. It is predicted that the nanoparticles locate preferentially at the polymer surface and ... -
Surface Tension of High Density Polyethylene (HDPE) in Supercritical Nitrogen: Effect of Polymer Crystallization
Thompson, R. B.; Park, Chul B.; Chen, P.; Wei, H. (Elsevier, 2009-06-10)Surface tension of a polymer melt in a supercritical fluid is a principal factor in determining cell nucleation and growth in microcellular foaming. This work focuses on the surface tension of a crystalline polymer, high ... -
Towards Maximal Cell Density Predictions for Polymeric Foams
Thompson, Russell B.; Kim, Yeongyoon; Park, Chul B.; Chen, P. (Elsevier, 2011-10-04)Self-consistent field theory is used to make direct predictions for the maximum possible cell densities for model polymer foam systems without recourse to classical nucleation theory or activation barrier kinetic arguments. ...