Internal donors on supported Ziegler Natta catalysts for isotactic polypropylene: a brief tutorial review

Paghadar, Bharat R. and Sainani, J B and Samith, K M and Bhagavath, Poornima (2021) Internal donors on supported Ziegler Natta catalysts for isotactic polypropylene: a brief tutorial review. Journal of Polymer Research, 28 (402). ISSN 1022-9760

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Abstract

The scientifc and technical advances in the feld of polymer science has been abundant in recent years. Amongst the various polymeric materials available in market, synthesis of polyolefns has been in the forefront since decades. A major challenge in this domain remains in attaining stereoregular polyolefns especially polypropylene (PP) and signifcant eforts were carried out by synthesizing various internal donors (ID) aiding the catalysts involved in producing them. This short review gives an overview of i) various generations of Ziegler–Natta (ZN) catalyst systems ii) general classes of ID that has been demonstrated by the researchers over the past decades iii) their infuence on PP isotacticity and polymer properties. The coordination modes of diferent donor classes on supported ZN system and comparative study especially between phthalate and diether ID classes were also addressed here. This review also presents the studies carried out on phthalate catalyst struc�ture analysis, detailed comparison study on phthalate and diether IDs in terms of PP isotacticity, regioselectivity, hydrogen response, and also their cross combination study and competitive behavior. Further a brief description on other structurally varied IDs like malonates, maleates, silyl diol esters, bifunctional donors, multi ether donors demonstrated for isotactic PP were also presented. Studies conducted on compatibility of incorporation of two diferent classes of IDs on a single supported ZN system for the fundamental understanding of the catalyst behavior; and also on how mixed donor approach enables in tuning the catalyst for polymer properties were also presented. This review also provides an opportunity to the young minds and the basic researchers from academic point of view by and large to create new polymeric materials with useful proper�ties or modify the existing materials for new applications by incorporating new IDs for further improvisation of the stereo regularity in obtaining the polymers

Item Type: Article
Uncontrolled Keywords: Internal donors · Ziegler Natta catalysts · Polypropylene · Isotacticity
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 20 Jan 2022 06:39
Last Modified: 20 Jan 2022 06:39
URI: http://eprints.manipal.edu/id/eprint/158095

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