Dewetting Kinetics of Thin Polymer Films with Different Architectures: Effect of Polymer Adsorption

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Abstract

We have investigated the influence of the adsorption process on the dewetting behavior of the linear polystyrene film (LPS), the 3-arm star polystyrene film (3SPS) and the ring polystyrene film (RPS) on the silanized Si substrate. Results show that the adsorption process greatly influences the dewetting behavior of the thin polymer films. On the silanized Si substrate, the 3SPS chains exhibit stronger adsorption compared with the LPS chains and RPS chains; as a result, the wetting layer forms more easily. For LPS films, with the decrease of annealing temperature, the kinetics of polymer film changes from exponential behavior to slip dewetting. As a comparison, the stability of 3SPS and RPS films switches from slip dewetting to unusual dewetting kinetic behavior. The adsorbed nanodroplets on the solid substrate play an important role in the dewetting kinetics by reducing the driving force of dewetting and increase the resistant force of dewetting. Additionally, Brownian dynamics (BD) simulation shows that the absolute values of adsorption energy (ε) gradually increase from linear polymer (−0.3896) to ring polymer (−0.4033) and to star polymer (−0.4264), which is consistent with the results of our adsorption experiments.

Keywords

Thin polymer film Star polystyrene Ring polystyrene Dewetting Adsorption 

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Acknowledgments

We are grateful to Dr. Ming-Ming Ding for help with Brownian dynamics simulations. This work was financially supported by the National Natural Science Foundation of China (Nos. 51473168, 21234007, 21674114, 51503048, 51573131 and 21374077) and the grant of Guizhou Education University (No. 107003001455) and the Natural Science Foundation of Guizhou Province (No. QKHJC[ 2017]1137).

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringTianjin UniversityTianjinChina
  2. 2.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunChina
  3. 3.Laboratory of Surface Physics and ChemistryGuizhou Education UniversityGuiyangChina
  4. 4.Department of Polymer Science and EngineeringHebei University of TechnologyTianjinChina

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