Comparison Between Crystaf and Other Characterization Techniques

Comparison Between Crystaf and Other Characterization Techniques 

Crystaf has often been compared to other techniques, specifically Tref and DSC [1,2,54-56]. It is generally accepted that Crystaf and Tref profiles differ mainly by a temperature shift due to the supercooling effect in Crystaf, similar to what is observed between the heating and cooling cycles in DSC. 

Gabriel et al. [56] compared Crystaf, Tref, and DSC profiles for LLDPE synthesized with a Ziegler-Natta catalyst (Fig. 29). Their results provide excellent validation of Crystaf analysis. Special care should be taken, however, when comparing results from different characterization techniques, because of differences in the typical operation conditions from one technique to another. The comparison with DSC is particularly difficult to make because DSC measures the heat of crystallization in the polymer melt where effects of chain 

To provide an unbiased comparison between Crystaf and Tref, we used these two techniques at the same CR to analyze polyolefin blends with known 

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