Date of Award

6-1955

Document Type

Union College Only

Degree Name

Bachelor of Science

Department

Chemistry

Language

English

Abstract

The heat resistance of several types of polyester resins are studied by measuring the flexural strength of glass reinforced laminates before and after conditioning at 200°C. Arc resistance readings are also taken. The type of saturated acid, glycol and monomer is varied. The ratio of saturated to unsaturated acid and the ratio of monomer to base resin is also studied. Chlorendic acid improves the heat resistance over phthalic and isophthalic acids but it lowers the arc resistance. Ethylene glycol yields resins with the highest flexural strengths. Styrene monomer content has little effect on heat resistance up to 40%. In the case of phthalic and isophthalic acid, increasing the proportion of unsaturated acid increases the heat resistance. However, the chlorendic­maleic acid combination shows optimum properties at a molar ratio of three to five.

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