Multi-scale modeling and synthesis of polyester ionomers

Area of Science:

• Polymer Science
• Materials Science
• Computational Chemistry

Background:

• Microphase separation is crucial for ionomer properties.
• Understanding self-assembly mechanisms is key to material design.
• All-atom models provide detailed insights but are computationally intensive.

Purpose of the Study:

• To simulate microphase separation in ionomer solutions using dissipative particle dynamics (DPD).
• To explore the mesomorphologies formed by varying concentration and temperature.
• To investigate the self-assembly behavior of ionomers with low functionalization.

Main Methods:

• Dissipative particle dynamics (DPD) simulations were employed.
• Simulations varied resin solution concentration and temperature.
• Mesomorphologies were analyzed under different conditions.

Main Results:

• Homogeneously distributed ionomers self-assemble into spherical micelles below 31 wt% solid load.
• An activation energy barrier governs the growth of pre-micellar aggregates.
• Computed aggregation numbers correlate with temperature-dependent interfacial tension and ionic content.

Conclusions:

• DPD simulations accurately predict ionomer self-assembly into spherical micelles.
• The findings align well with experimental observations.
• The study provides a computational framework for designing ionomer materials.