AbstractA system for the study of polymer structure by differential thermal analysis (DTA) techniques is presented. The need for an inert reference body has been eliminated by the use of a thermal delay within the sample itself. Typical data showing both first‐ and second‐order transition behavior for appropriate polymers are presented. The applicability of the technique to liquids is also shown. Three first‐order transitions have been found intrans‐1,4‐polybutadiene. The insoluble nature of high polymers in one another is again confirmed, even in those systems which disperse well. The latent heat of crystallization ofcis‐1,4‐polybutadiene is about 2
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