Abstract
Phase-transfer catalytic porous polyethylene membranes, prepared by γ-ray irradiation grafting of 4-vinyl pyridine and quaternization, were tested in nucleophilic substitution reaction. The effects of grafting conditions (irradiation dose, 4-vinyl pyridine concentration) and quaternization parameters (temperature, time, concentration of reagent) were investigated. It was found that, the grafting degree initially increases with irradiation dose or 4-vinyl pyridine concentration and then decreases. The ion exchange capacity and quaternization ratio of membranes rise with quaternization temperature, time, and reagent concentration. The quaternized membranes exhibit good phase-transfer activity in nucleophilic substitution reaction between n-bromooctane and KI aqueous solution. The n-bromooctane conversion and the observed reaction rate constant rise with the increase in ion exchange capacity of membranes or reaction temperature. This paper provides a novel and promising method for phase transfer catalysis.
Sign-in/Register to access full text options 
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.
