EFFECT OF TEMPERATURE AND DURATION OF POSTCURE ON IN-VITRO WEAR AND QUANTITY OF REMAINING DOUBLE-BONDS OF RESINS CONTAINING CARBOXYLIC ANHYDRIDE

The present study determined the effect of post-cure temperature and d uration on in vitro wear resistance and quantity of remaining double b onds of anhydride-containing resins. Temperatures were varied between 37 degrees C and 225 degrees C, and durations were varied between 0 an d 24 h. The quantity of remaining double bonds could not be establishe d for post-cure temperatures of 200 degrees C or more due to melting o f the polymer. A temperature of approximately 120 degrees C had optima l effect on wear resistance. Quantity of remaining double bonds and we ar were found to decrease with increasing duration of post-cure. Low q uantities of remaining double bonds were generally associated with low in vitro wear.