INTERFACIAL EFFECTS IN SOLID PAINT FILMS RELATED TO SOME FILM PROPERTIES
W. Funke, Ulrich Zorll, B. G. K. Murthy · 1969
THE MOST IMPORTANT SOLID-SOLID INTERFACES IN PAINT SYSTEMS WHICH AFFECT FILM PROPERTIES ARE THOSE BETWEEN FILM AND SUBSTRATE, WITHIN THE VEHICLE ITSELF AND BETWEEN VEHICLE AND PIGMENT PARTICLES. THE ACTION OF LIQUID WATER ON THESE INTERFACES IS OF SPECIAL INTEREST. THIS PAPER DISCUSSES INTERFACIAL EFFECTS OF WATER ON BLUSHING, PERMEABILITY AND STRESS-STRAIN BEHAVIOR OF PIGMENTED PAINT FILMS. BLUSHING ONLY OCCURRED ABOVE THE GLASS TRANSITION RANGE. BY PERMEATION STUDIES WITH TRITIATED WATER IT IS SHOWN THAT, CONTRARY TO RESULTS OBTAINED WITH PERMEABILITY CUPS, WATER PERMEATION IN FULLY IMMERSED FILMS IS OFTEN STRONGLY ENHANCED BY PIGMENTATION, AT LEAST UP TO SOME DEGREE OF PIGMENT CONCENTRATION. ELASTIC MODULUS, TENSILE STRENGTH AND ULTIMATE ELONAGTION OF FULLY IMMERSED PAINT FILMS PROVIDE EVIDENCE OF THE INFLUENCE OF WATER ON THE PIGMENT-VEHICLE INTERACTION. /AUTHOR/