Abstract
Polycondensation of ethylene glycol and of glycerol with H 3 PO 4 elaborated recently is summarized. Surprisingly, this apparently simple reaction, leading to a new class of synthetic polymers, has not previously been studied. In both reactions, soluble oligomers are formed, in spite of H 3 PO 4 , the class A3 component, being used. Dealkylation prevents the formation of high molar mass products, while also influencing the stability of the triesters in the case of ethylene glycol condensation. Polycondensation does not proceed directly with H 3 PO 4 . Independent kinetic experiments reveal that in the rate-controlling step, pyrophosphoric acid is formed. In polycondensation of glycerol, five- and six-membered rings are present in the main chain, indicating that the A3/B3 system has been converted into the A2/B2 system (at least partially). Both polymers have been shown to be efficient modulators of the CaCO 3 crystallization.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Phosphorus, Sulfur, and Silicon and the Related Elements
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
