Ti(OBu)4/B(OBu)3: Deciphering the mechanism for the formation of high molecular weight poly(butylene succinate)

We report the use of titanium tetraalkoxide in combination with trialkyl borate as an efficient catalyst system For the synthesis of high molecular weight PBS. It is observed that, the addition of trialkyl borates during polycondensation reaction results in the formation of high molecular weight PBS...

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Bibliographic Details
Published inJournal of applied polymer science Vol. 140; no. 20
Main Authors Savitha, K. S., Senthil Kumar, M., Jagadish, R. L.
Format Journal Article
LanguageEnglish
Published Hoboken, USA John Wiley & Sons, Inc 20.05.2023
Wiley Subscription Services, Inc
Subjects
Borates
Carboxylic acids
Chemical synthesis
high molecular weight
Materials science
Molecular weight
poly(butylene succinate)
Polycondensation reactions
Polymers
selective trans‐esterification
thermal degradation
Titanium
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Summary:We report the use of titanium tetraalkoxide in combination with trialkyl borate as an efficient catalyst system For the synthesis of high molecular weight PBS. It is observed that, the addition of trialkyl borates during polycondensation reaction results in the formation of high molecular weight PBS. This might be due to the activation of free terminal carboxylic acids in PBS oligomer by trialkyl borates via the formation of highly reactive acyloxyboron intermediate. A plausible mechanism for the activation of free terminal carboxylic acids by trialkoxy borates has also been proposed. Hitherto unknown mechanism for the enhanced catalytic activity of tin over titanium based catalysts have been proposed through a systematic investigation.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.53842