The thermal conductivity of a solid or gas filled polymer is iised i n processing or end use application calculations. Numero u s theoretical and empirical correlations are fomntl in the literature. A careful re\,iew ofthese niotlels indictes that no one correlatioii or technique accuratel? predicts the thermal contluctivit! of all t?-pes of composites. The investigation indicated that for solid filled composites the Lewis and Nielseii eqiiation fittctl the experimental data best for the range offillers tested. However, for a gas filled pol? nier, iioiie ofthe theoretical models proved atleqiiate. The semi-empirical approach of Hartli in g show e (1 co in s i derab le merit ,

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A comparison of experimental data for zero strain Young's modulus of uniform density thermoplastic foam for short times has been made with several theoretical and empirical correlations. An analysis of the variance of the data with the predicted values from the many models indicated that the simplistic density squared relationship adequately described the modulus of the foam for basic engineering calculations.

One dimensional transient heat conduction analysis of reactive, unfilled polyesters and epoxies shows that care must be taken during curing to minimize large temperature excursions due to internal heat generation. Isothermal heat generation rates have been shown to underestimate the non‐isothermal values by more than an order of magnitude.

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