Influence of 1,3-diethers on the stereospecificity of propene polymerization by supported Ziegler-Natta catalysts. A theoretical their adsorption on (110) and (100) lateral cuts of MgCl2 platelets

Massimiliano Toto, Giampiero Morini, Gaetano Guerra, Paolo Corradini, Luigi Cavallo

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

Energy calculations relative to the adsorption of several substituted 1,3-diethers on the unsatured (100) and (110) lateral cuts of MgCl2 are presented. Independent of the particular approach used, coordination of the diethers on the (110) cut is always preferred. The energy difference favoring the diether coordination on the (110) cut depends on the substituents on carbon 2 of the 1,3-alkoxypropane skeleton. These calculated energy differences are able to rationalize the observed dependence on the chemical structure of the 1,3-diethers of the stereoregulating ability for propene polymerization of MgCl2/TiCl4 catalytic systems. In fact, a semiquantitative relationship has been found in the assumption that xylene-soluble (essentially atactic) and -insoluble (essentially isotactic) fractions of polypropylene obtained by these catalytic systems are prevailingly produced by Ti catalytic species adsorbed on (100) and (110) cuts, respectively.

Original languageEnglish (US)
Pages (from-to)1134-1140
Number of pages7
JournalMacromolecules
Volume33
Issue number4
DOIs
StatePublished - Jan 1 2000

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Influence of 1,3-diethers on the stereospecificity of propene polymerization by supported Ziegler-Natta catalysts. A theoretical their adsorption on (110) and (100) lateral cuts of MgCl<sub>2</sub> platelets'. Together they form a unique fingerprint.

Cite this