Modified PRISM theory for confined polymers.

Area of Science:

• Polymer physics
• Materials science
• Computational chemistry

Background:

• Understanding polymer behavior at interfaces is crucial for materials design.
• Existing models often struggle to accurately describe polymer-surface interactions, especially on curved surfaces.

Purpose of the Study:

• To develop a modified polymer reference interaction site model (PRISM) for improved description of polymer interfacial density profiles.
• To validate the modified model against simulation data for polymers interacting with planar and curved surfaces.

Main Methods:

• Modification of the polymer reference interaction site model (PRISM).
• Incorporation of a bridge function derived from density functional theory.
• Application to hard-sphere polymers at planar and curved surfaces under external fields.

Main Results:

• The modified PRISM model successfully describes interfacial density profiles for polymers on solid surfaces.
• Validation against simulation data confirms the model's accuracy for most systems, with noted exceptions in low-density regimes.
• The model demonstrates potential for analyzing interfacial structure in confined real systems.

Conclusions:

• The modified PRISM model offers a more accurate theoretical framework for polymer-surface interactions.
• This advancement is valuable for predicting and designing materials with specific interfacial properties.
• The model shows promise for further applications in nanoscience and polymer engineering.