A New Simple Measuring Method for Temperature Dependence of Viscoelastic Behavior of High Polymers by Means of Creep Strain Recovery (Part 1):Compression Method

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A simple measuring method for temperature dependence of viscoelastic behavior of high polymers is proposed. This method is performed by measuring the recovery of creep strain from a room temperature to elevated temperatures. In this paper, the creep strain recovery method in unaxial compression is presented theoretically and experimentally. Test specimens used are cast resin of diallyl phthalate homopolymer as a cross-linked polymer and hard polyvinyl chloride resin as a linear polymer. The transition temperature to entropy elasticity and flow temperature can be demonstrated clearly by Jc (creep compliance in strain recovery)-θ(temperature) curves. Further, the temperature dependence of characteristic relaxation times may be computed from Jc-θ curves and compared with Williams-Landel-Ferry's law.
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