Paper Number
PO133 

Session
Poster Session

Title
Slip and flow dynamics of thin polymer films

Presentation Date and Time
October 8, 2014 (Wednesday) 6:05

Track / Room
Poster Session / Poster

Authors (Click on name to view author profile)

1. Sabzevari, S. Mostafa (Concordia University, Department of Mechanical and Industrial Engineering)
2. McGraw, Joshua (Saarland University, Dept. of Experimental Physics)
3. Jacobs, Karin (Saarland University, Dept. of Experimental Physics)
4. Wood-Adams, Paula M. (Concordia University, Department of Mechanical and Industrial Engineering)

Author and Affiliation Lines (in printed abstract book)
S. Mostafa Sabzevari¹, Joshua McGraw², Karin Jacobs², and Paula M. Wood-Adams^1
1Department of Mechanical and Industrial Engineering, Concordia University, Montreal, QC, Canada; ²Dept. of Experimental Physics, Saarland University, Saarbrucken, Germany

Speaker / Presenter 
Sabzevari, S. Mostafa

Text of Abstract
We investigate the slip of tridisperse mixtures of nearly monodisperse polystyrene samples on Teflon-coated silicon wafers using dewetting experiments. Tridisperse samples with a fixed weight-average molecular weight but different number-average molecular weight were prepared. Thin films of ca. 200 nm were spun cast on mica from polymer solutions and transferred on Teflon substrates. Hole growth rate and rim profile of samples with and without annealing were examined at different temperatures above the glass transition temperature of samples. Slip properties and flow dynamics were then examined and compared. We found that the rim morphology and slip of polystyrene blends on Teflon is independent of the molecular weight distribution. On the other hand, flow dynamics is significantly affected by the presence of short chains in mixture. This was attributed to lower glass transition temperature of short chains.