Abstract
The fluorinated liquid nitrile-butadiene rubber (F-LNBR) was designed via the metathesis degradation of nitrile-butadiene rubber (NBR) with 2,2,3,4,4,4-hexafluorobutyl acrylate (F6) as a model fluorination chain transfer agent. The fluorination degree (defined as the mass ratio of F6 units in the resultant F-LNBR) and relative molecular weight of the products after different reaction times were characterized with the 1H NMR and GPC techniques. Prolonging the reaction time, the fluorination degree increased while the relative molecular weight decreased. Based on the 1H NMR and GPC analysis, the reaction mechanism was proposed: the metathesis degradation of NBR by its intramolecular cross metathesis (CM) was the main reaction in the initial stage, leading a distinct decline in the relative molecular weight, while the fluorination via the CM between the 1,4-butadiene units in the resulted LNBR and F6 was the main reaction in the late stage, increasing the fluorination degree.
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 callDisclaimer: 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.
