Molecular Structure and Physical Properties of Carbonized Thermoset High Polymer

The Relation between the Baking Temperature and Thermal Contraction, Elasticity, Porosity and Specific Gravity

Abstract

It was found that carbide with an extremely steady characteristic can be obtained by baking the furan resin, one sort of thermoset high polymer, in the condition of 3-4°C/h up to 200°C and 7 -8°C/h above 200°C respectively in N2, gas and He gas atmosphere. Relatively few researches have been done so far of the high molecule carbide as a bulk material such as the one we did. The application as an industrial material can be expected by further elucidation of physical properties. In this report, we will report on the measurement result of thermal contraction, modulus of elasticity, porosity, and the specific gravity relative to baking temperature. The carbonized furan resin shrank by baking, and the change was great from normal temperature to 1, 000°C. The contraction reached about 25% at 1, 000°C or above, and became steady. Modulus of elasticity increased by baking about 600°C or above, and indicated the maximum value of about 30GPa at 1, 250°C. The porosity got stabilized comparatively by baking about 1, 000°C or above, and indicated the minimum value of about 2% at 1, 500°C. The specific gravity got almost stabilized by baking about 1, 500°C or above, and indicated the value of about 1.5.