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The effect of temperature on the interfacial tension of polycarbonate/polyethylene blends
Author(s) -
Pham H. T.,
Carriere C. J.
Publication year - 1997
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11706
Subject(s) - materials science , surface tension , polycarbonate , tension (geology) , composite material , viscosity , polyethylene , yield (engineering) , thermodynamics , ultimate tensile strength , physics
Controlling interfacial tension during the processing of blends is critical to developing morphologies that will yield consistent and acceptable mechanical properties. Determination of the interfacial tension is important in developing a predictive understanding of the effects of processing conditions on the morphology and the physical properties of multicomponent systems. The focus of the research reported herein was to investigate the temperature dependence of the interfacial tension for blends composed of polycarbonate (PC) and polyethylene (PE). The effects of temperature were characterized by direct measurements of the interfacial tension using the imbedded fiber retraction (IFR) method. The interfacial tensions of PC/PE were measured at 210, 220, 230, and 240°C. The temperature dependence of the interfacial tension was found to be −0.018 ± 0.006 dyn/cm‐°C. In general, the interfacial tension, evaluated for low‐viscosity simple fluids, is commonly a weak function of temperature (on the order of 0.01 dyn/cm‐°C). The results found in this study are in accord with those findings.