Influence of stereochemistry on the miscibility of polymer blends

What is it about?

Stereochemistry of the polymer plays a major role on deciding the miscibility of polymer blends. This is an area which has been left unattended. In the case of semi-crystalline polymers the generation of crystalline regions depend a lot on the work of chain folding as well as on the stereochemistry. If the work of chain folding is low then they can crystallize quickly. Similarly if the most stable conformation favor close packing then they can crystallize easily.

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Why is it important?

The influence of stereochemistry of Poly(trimethylene terephthalate) (PTT) on miscibility is investigated here. PTT can have different stereo chemical forms like tggt, gttg, and all trans conformations. Of these different forms the tggt having the lowest energy contribute to the crystalline fractions and the influence of a low molecular weight additive (like epoxy resin) is investigated here.