Submitted to: American Chemistry Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 24, 2000
Publication Date: N/A
Technical Abstract: The imbedded fiber retraction (IFR) method was used to measure the interfacial tensions of PS/PDMS blends as a function of PDMS molecular weight and temperature. The Mn of PDMS samples were 106 and 31.3 kg/mol and that of PS was 100 kg/mol. The temperature was varied from 150-180 deg C. Measured interfacial tensions for all PS/PDMS blends decreased with increasing temperature below 180 deg C and was also independent of the molecular weight of the PDMS component. The interfacial tensions of PS/PDMS 106 and PS/PDMS 31 below 180 deg C obtained in this work are in agreement with the general trend of reported interfacial tensions of OS/ODMS as well as PS/PDMS blends obtained from sessile drop and pendant drop experiments. This indicates that the IFR procedure will give comparable results to conventional equilibrium methods on blends with low viscosity components.