Synthesis And Properties Of Reversible Addition-Fracture Transfer(RAFT) Polymer Based On Curbiturea

In this paper,the free radical polymerization method is used to introduce cucurbit[6]urea into the polymer to obtain a dual stimulusresponsive polymer with cucurbit[6]urea,and its properties are studied.This paper is mainly divided into the following parts:(1)Starting from cucurbit[6]urea,through the Fenton oxidation method to obtain monohydroxy cucurbit[6]urea,and then through esterification reaction to obtain CB[6]-RAFT reagent.(2)One-pot reversible addition-fragmentation transfer of CB[6]-RAFT ester monomer with acrylic acid and N-isopropylacrylamide was successfully prepared,and a stimuli-responsive linear multiblock based on CB [6] was successfully prepared Copolymer.The multiblock polymer was characterized by nuclear magnetic hydrogen spectrum,infrared spectrum,GPC,etc.,and the morphological observation was carried out by scanning electron microscope,etc.;and the temperature,pH value,external salt,etc.were used to study the block polymerization in detail.The effect of physical stimulus response performance.The experimental results show that by controlling the molecular weight of the polymer chain,the length of the chain can regulate the stimulation response of the two-block polymer.(3)One-pot reversible addition-fragmentation transfer of CB[6]-RAFT reagent with acrylic acid and acrylamide was successfully performed,and a stimuli-responsive linear multiblock copolymer based on CB[6] was successfully prepared.The multiblock polymer was characterized by nuclear magnetic hydrogen spectrum,infrared spectrum,GPC,etc.,and the morphological observation was carried out with a scanning electron microscope etc.;The effect of physical stimulus response performance.The experimental results show that by controlling the molecular weight of the polymer chain,the length of the chain can regulate the stimulation response of the multiblock polymer.(4)In this thesis,CB[6]-RAFT reagent,acrylic acid,and 4-vinylpyridine were used to perform reversible addition-fragmentation transfer in a one-pot method.Segment copolymer.And characterize and observe the morphology.Then study the stimulus response performance of the polymer under different conditions.The experimental results show that by controlling the molecular weight of the polymer chain,the length of the chain can regulate the stimulation response of the multiblock polymer.(5)In this thesis,CB[6]-RAFT reagent is used to prepare the CB[6]-RAFT reagent monomer with N-vinylpyrrolidone and 2-(Dimethylamino)ethyl methacrylate by reversible addition-fragmentation transfer.Stimulus responsive linear multiblock copolymer based on CB[6].