Synthesis of well-defined 8-shaped polymers by the combination of RAFT polymerization and click reaction

Abstract

A series of well-defined 8-shaped polymers have been synthesized by the combination of reversible addition-fragmentation chain transfer (RAFT) polymerization and click reaction. Firstly, well-defined, azide-terminated, four-armed star polymers including poly(N,N-dimethylacrylamide) and polystyrene were prepared by RAFT polymerization using pentaerythritoltetrakis(3-(S-(2-azidoethylcarbonoyl)trithiocarbonyl)propanoate) as a chain transfer agent. Then, intramolecular cyclization of the azide-functionalized four-armed precursors was conducted under highly dilution conditions using a bifunctional N,N-bis(2-propargyloxycarbonyl ethyl)-2-hydroxylethyl amine as the linker, affording 8-shaped polymers. FTIR, 1 H NMR, GPC, and MLADI-TOF MS analysis confirmed that the coupling reaction proceeded via the cyclization manner.

Glasses‐shaped triblock copolymer prepared by combination of atom transfer radical polymerization and ring opening polymerization

“…Furthermore, liquid chromatography under critical conditions (LCCC) has been successfully employed for isolating cyclic polymers under optimized chromatographic conditions (i.e., the mobile phase and temperature). 15 These synthetic and purification developments have allowed the synthesis of various topologies of cyclic polymers, such as tadpole-, [16][17][18] sun-, 19 8-, 20 dumbbell-, 21 and theta-shape. 22 Further, additional examples of multicyclic topologies of theta-shaped bicyclic, 23,24 cage-shaped tricyclic polymers, 25 polyring, 26 and spiro-multiblock 27 (co)polymers have been realized in our group.…”

Synthesis and Characterization of Poly Chloromethylstyrene TiO2-Nanocomposite Through a Simple Method via Reversible Addition-Fragmentation Transfer Polymerization

“…The development of CRP permitted to achieve well-defined polymers using a radical process easy to carry out. Various methods for CRP have been proposed; however, the most successful methods include atom transfer radical polymerization (ATRP) [4][5][6][7] , nitroxide mediated polymerization (NMP) [8][9][10][11][12][13][14][15] , and reversible addition-fragmentation transfer (RAFT) polymerization [16][17][18][19] . The emergence of controlled radical polymerization (CRP) techniques, in particular, reversible addition fragmentation chain transfer (RAFT) polymerization [20][21][22] , has allowed for more control over polymer molecular mass.…”

POSS-based hybrid thermosets via photoinduced copper-catalyzed azide–alkyne cycloaddition click chemistry

“…[8] Today, the copper-catalyzed azide-alkyne cycloaddition (CuAAC) is one of the most powerful synthetic reactions to connect two dissimilar units. [9,10] This efficient process can be applied on to various types of interfaces, such as liquid/liquid, [11][12][13] solid/liquid, [14][15][16] or even solid/solid [17] in the synthetic chemistry. For example, the CuAAC reaction has been used to prepare various nanocomposite materials starting from carbon nanotubes, [18,19] graphenes, [20,21] nanoclays, [22][23][24][25][26] and metal oxide [27] and silica nanoparticles.…”