The Influence of Composition, Distillated and Synthetic Sea Water and Elevated Temperature on Mechanical and Physical Characteristics of Four Cured Different Polyester Systems

Jovan Radulović

In this paper the influence of composition of resins, distillated and synthetic sea water on mechanical and physical characteristics of four different polyester resin (PR) systems is presented. The basic data about chemistry of PR, ingredients of PR systems (polyhydric alcohols, an unsaturated polybasic acids, a saturated polybasic acids and monomer), process for manufacturing of hardened and post cured specimens and testing procedure are presented. Specimens of four PR systems were exposed to the influence of distillated and synthetic sea water at 23 °C for a period of thirty days (the first experiment) and distillated boiling water (100 °C) for a period of 210 minutes (the second experiment). Hardness, impact resistance, water soluble matter and water absorption of specimens of four PR systems were recorded as the parameters that demonstrate the quality changes of tested materials in mentioned conditions of both experiments. It is established that ingredients and distillated and synthetic sea water have important influence on tested mechanical and physical characteristics of four PR systems.

Key words: polyester resin, mechanical properties, physical properties, distillated water, sea water, synthetic water, testing results.