Measurement of Shear Viscosity and Solubility of Polystyrene Melts Containing Various Blowing Agents

Autor:	K. S. Hyun, F. Wu, D. B. Todd, S. Dey, Mark E. Polasky, R. Loh, C. Wan, Manoj K. Choudhary, Yadollah Delaviz
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Rheometer Relative viscosity General Chemistry Polymer Viscosity chemistry.chemical_compound chemistry Blowing agent Polymer chemistry Materials Chemistry Fluorocarbon Polystyrene Solubility Composite material
Zdroj:	Journal of Cellular Plastics. 41:589-599
ISSN:	1530-7999 0021-955X
DOI:	10.1177/0021955x05059036
Popis:	This article presents measured data on shear viscosity and solubility of HCFC-142b and HFC-134a/ethanol blowing agent laden polystyrene melts at different temperatures. This study establishes the baseline for more novel and innovative blowing agent systems to replace HCFC-142b. The shear viscosity is measured using a helical barrel rheometer. Apparent solubility is determined by observing the onset of gas bubble presence or absence in a specially designed optical cell with sapphire windows using a microscope–CCD camera–monitor/recorder system. The article presents a selection of viscosity and solubility data and, where possible, compares them with measurements carried out by others. The dynamic methods of measuring solubility and viscosity of gas laden polymer melts used in this study are closer to the polymer foam manufacturing practice.
Databáze:	OpenAIRE
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