Exploration of the effect of 2,6-(t-Bu)2-4-Me-C6H2OH (BHT) in chain shuttling polymerization
Literature Information
Publication Date
2013-06-06
DOI
10.1039/C3PY00506B
Impact Factor
5.582
Authors
Camille Descour, Timo J. J. Sciarone, Dario Cavallo, Tibor Macko, Mauritz Kelchtermans, Ilia Korobkov, Robbert Duchateau
View Original
Abstract
The interactions of a sterically hindered phenol [2,6-(t-Bu)2-4-Me-C6H2OH] (BHT) with the scavenger MAO (AlR3) and ZnR2 during Hf/Zr-based chain shuttling polymerization in a semi-batch reactor have been investigated. NMR model studies indicated preferential binding of BHT to aluminum under these conditions. Subsequently, reproducible polymerization runs gave rise to copolymers that were thoroughly characterized by HT-SEC, HT-HPLC, DSC, thermal fractionation (SSA), 13C NMR, density measurements, CRYSTAF and optical microscopy to unravel their complex microstructures. The obtained materials differ from a simple solution blend of materials, separately produced by single catalysts, but also from multi-block copolymers as obtained by DOW's continuous process, although a blocky structure can be rationalized.
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Polymer Chemistry
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