Indentation behavior of new vegetable oil based thermoset copolymer

L. FASCE; C. MEIORIN; M. A. MOSIEWICKI

Rosario

Congreso; 11° Congreso Binacional de Metalurgia y Materiales (SAM/CONAMET 2011); 2011

Tung oil based copolymers constitute a new type of materials with high amount of raw materials from renewable resources. The cationic polymerization of unmodified tung oil and styrene generates thermoset polymers with properties highly dependent of the tung oil/styrene ratio. Indentation is a technique to map mechanical properties in a confined small area on a nano or micron scale complementary to the bulk mechanical testing techniques. Creep effect can be evident either in the holding period or in the unloading curve. If the load history has a holding period, creep will be shown as a displacement of the tip even though the load remains unchanged. The creeping can be significant and to induce big errors in the modulus and hardness calculus. In this work, microindentation is used to characterize and to complement the information on the mechanical behavior of a copolymer based on vegetable oil with potential future application in coat-ing mainly for wood.