Adsorption and Desorption Dynamics of Linear Polymer Chains to Spherical Nanoparticles:  A Monte Carlo Investigation

Dynamics of attachment/detachment processes of chains to/from spherical fillers in a polymer nanocomposite is investigated by means of numerical simulations using a chemistry-specific model for the polymer. The effects of polymer−particle interaction, chain length, chain-to-filler distance, and fill...

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Bibliographic Details
Published in:Macromolecules 2006-04, Vol.39 (8), p.3089-3092
Main Authors: Dionne, Peter J, Picu, Catalin R, Ozisik, Rahmi
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:Dynamics of attachment/detachment processes of chains to/from spherical fillers in a polymer nanocomposite is investigated by means of numerical simulations using a chemistry-specific model for the polymer. The effects of polymer−particle interaction, chain length, chain-to-filler distance, and filler radius on the attachment/detachment processes are studied. It is found that the time a chain is in contact with a filler scales with the number of attached beads following a power law. Increasing the energetic interaction parameter between polymer and filler slows the detachment process, and the system average characteristic detachment time follows an Arrhenius law in which the activation energy is proportional to the polymer−particle energetic interaction parameter.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma0527754