Catalyst-polymer relationship, Ziegler-Natta

Two methods for preparing the calibration curve have been reported. Both methods were done by performing Crystaf analysis in a series of narrow-CCD copolymer samples with known comonomer contents with crystallizabilities covering a broad range of crystallization temperatures. The only difference between these two methods is the type of samples used in the calibration. The first method uses a series of polymer samples synthesized with single-site-type catalysts [58,68], while the second method uses a series of fractions from broad-CCD Ziegler-Natta copolymers obtained with P-Tref [1,49]. After the whole series of samples has been analyzed, the relationship between Crystaf peak temperature and CC is used as the cahbration curve. 

Methyl-1-pentene reacts with a Ziegler-Natta catalyst to give an isotactic polymer. What relationship exists between the alkyl groups on the polymer chain ... 

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