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United States Department of Agriculture

Agricultural Research Service

Title: Molecular Weight and Temperature Dependence of the Interfacial Tension of Ps/pdms Blends Using Imbedded Fiber Retraction Method

Authors
item Biresaw, Girma
item Carriere, Craig

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.

Last Modified: 10/21/2014
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