The World of Surface Coatings is Centered Around the Glass Transition Temperature. But Which One?


Functional, protective, and decorative surface coatings rely upon polymers to drive material performance. The basis for formulation variables, application characteristics, and environmental specific performance are each tied directly to the selected materials glass transition temperature(s). The polymer, prepolymer/ oligomer, and crosslinker glass transition temperature directly impacts formulation, application, cure/crosslinking, ageing and performance. Moreover, the glass transition temperatures for all raw materials in combination, e.g., solvents, water, additives, pigments/fillers, and plasticizers each influences the resulting surface coating characteristics at every stage. The lecture will focus on material combination examples to systematically reveal the fact that, regardless of polymer material type, the glass transition temperature is the most critical decision making point. The glass transition temperature is affected by each raw material and substrate combination, yet it is very often overlooked by materials scientists during surface coatings development, optimization, and utilization.