Controlled copolymerization of n-butyl acrylate with semifluorinated acrylates by RAFT polymerization

Abstract

A new class of well-controlled semifluorinated copolymers were successfully synthesized via RAFT polymerization. We found that ESI-TOF MS was particularly useful for readily analysing our semifluorinated copolymers. The reactivity ratios of each pair of co-monomers are close to one.

Controlled radical polymerization of fluorinated methacrylates in supercritical CO2: Synthesis and application of a novel RAFT agent

“…However, in the presence of the non‐fluorinated CTA of DBTTC, the relationship between M n of PDFHMA and conversion of DFHMA in scCO 2 was obviously deviated from the linear feature possessed by the living/controlled polymerization. The controllability of DBTTC to the polymerization of DFHMA in scCO 2 was considerably poor, indicating that DBTTC is not an effective CTA to the controlled radical polymerization of the (highly) fluorinated methacrylate monomers in scCO 2 , though it was found to be a good CAT in the RAFT copolymerization of n‐butyl acrylate with some semifluorinated acrylates in DMF …”

“…The controllability of DBTTC to the polymerization of DFHMA in scCO 2 was considerably poor, indicating that DBTTC is not an effective CTA to the controlled radical polymerization of the (highly) fluorinated methacrylate monomers in scCO 2 , though it was found to be a good CAT in the RAFT copolymerization of n-butyl acrylate with some semifluorinated acrylates in DMF. 17 Though the controllability of DPFBTTC was verified to be much better than that of DBTTC to the controlled radical polymerization of DFHMA in scCO 2 , the mechanism of such controllability is of great challenge and so far to be discerned. Possible reasons are primarily demonstrated as follows.…”

“…So far, the techniques for measuring the monomer conversion in RAFT polymerizations are gravimetric method 37-40 and 1 H NMR. 17,41,42 The gravimetric method was popularly used to obtain the monomer conversion in the RAFT polymerization carried out in organic solvents or water. 38 However, it seems not suitable for the investigation of polymerization kinetics in scCO 2 at least due to its time-consuming.…”

“…Chem. 2016, 54, 825-834 KEYWORDS: controlled polymerization; fluorinated methacrylate; fluorinated reversible addition-fragmentation chain transfer (RAFT) agent; high-pressure in-situ NIR; supercritical CO 2 tion of (highly) fluorinated monomers, [16][17][18][19] which hindered the preparation and the application of potential fluorinated functional polymers to a considerable extent. Fluorinated (meth)acrylate(s) is a kind of monomer with dual characteristics of both the fluorinated monomer and the (meth)acrylate monomer.…”

Cobalt(iii) acetylacetonate initiated RAFT polymerization of acrylonitrile and its application in removal of methyl orange after electrospinning

“…), the electrospinning technique distinguishes itself due to its simple devices, and its ability to manufacture one-dimensional nanomaterials with high slenderness ratio. [32][33][34][35] Several kinds of RAFT agents have been appropriately applied to the synthesis of PAN and its copolymers in the presence of azo-initiators. 22 Theoretically, PAN with relatively broad MWDs usually has a wide distribution of hydrodynamic radii and relaxation times of chains in solution.…”