The cohesive energy densities (ced) of five unsaturated polyester resins with varying degree of crosslinks were determined by swelling measurements in 17 single solvents and 11 binary solvents of the acetone–benzene system. The solubility parameters (δ_P) of these resins were calculated by six methods. It is concluded that the values of δ_p for the unsaturated polyester resins decrease with increasing degree of crosslinks. Since the unsaturated polyester resin consists of polar and nonpolar parts in molecular structure, the choice of solvents is very important in order to obtain the maximum degree of swelling when δ_p is estimated by swelling measurements.

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Volume28, Issue9

September 1983

Pages 2847-2866

Determination of cohesive energy densities of unsaturated polyester resins from swelling measurements

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Determination of cohesive energy densities of unsaturated polyester resins from swelling measurements

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