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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Real time monitoring by time-domain NMR of ring opening metathesis copolymerization of norbornene-based red palm olein monomer with norbornene

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Fernandes, Henrique [1] ; Filgueiras, Jefferson G. [2] ; de Azevedo, Eduardo R. [2] ; Lima-Neto, Benedito S. [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Quim Sao Carlos, POB 780, BR-1366070 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, POB 369, BR-13660970 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: EUROPEAN POLYMER JOURNAL; v. 140, NOV 5 2020.
Web of Science Citations: 0

Changes in molecular mobility throughout the metathesis copolymerization of a norbornene functionalized with a palm olein monomer and a pure norbornene were monitored in situ by time-domain H-1 NMR, using a ruthenium catalyst. Reaction progress to produce branched palm oil-based copolymers was studied as a function of the amounts of monomers and catalyst. Transverse relaxation rates were determined from CPMG experiments and the results were in accordance with the reactivity ratios, which indicated production of gradient copolymers. Properties of the resulting material observed through TD-NMR measurements of the isolated copolymers corroborated the type of the used monomers. TD-NMR demonstrated to be a useful tool for learning copolymerization reactions, particularly in ROMP, for the first time. (AU)

FAPESP's process: 17/24465-3 - NMR methods for plant cell wall characterization: development and applications to second generation biofuel technologies
Grantee:Eduardo Ribeiro de Azevedo
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
FAPESP's process: 17/06329-5 - Development of ruthenium complexes with ammines as ancillary ligands for homogeneous catalysis of ring opening metathesis polymerization of cyclic olefins
Grantee:Benedito dos Santos Lima Neto
Support Opportunities: Regular Research Grants