Computer simulation of the core-shell microgels synthesis via precipitation polymerization

Area of Science:

• Polymer Chemistry
• Materials Science
• Computational Modeling

Background:

• Precipitation polymerization is a key method for synthesizing microgels.
• Controlling microgel internal structure is crucial for tailored applications.
• Existing models may not fully capture experimental cross-linking processes.

Purpose of the Study:

• To develop a novel computational model for precipitation polymerization.
• To investigate the influence of cross-linker-monomer reactivity ratios on microgel internal structure.
• To simulate a realistic cross-linking process based on experimental procedures.

Main Methods:

• Development of a novel computational model for precipitation polymerization.
• Simulation of microgel formation using Monte Carlo (MC) methods.
• Analysis of cross-linker-monomer reactivity ratios (r) and their impact on structure.

Main Results:

• Cross-linker-monomer reactivity ratios (r) dictate microgel internal architecture.
• Values of r < 1 promote alternating sequences, yielding distinct core-shell microgels.
• Density profiles and dangling end distributions confirm a dense core and loose corona structure for low r values.

Conclusions:

• The computational model accurately predicts microgel formation and internal structure.
• Cross-linker-monomer reactivity ratios are critical parameters for designing core-shell microgels.
• The model aligns with experimental cross-linker consumption observations.