One-pot self-coupling concurrent living polymerizations of inimers to synthesize hyperbranched-linking-hyperbranched polymer cylinders via cyclic trithiocarbonate

Abstract

In this paper, we present a convenient one-pot self-coupling concurrent living polymerization strategy for synthesizing one-dimensional hyperbranched-linking-hyperbranched cylindrical macromolecules. A RAFT agent served as a "hyper-linker" to link hyperbranched blocks. The obtained polymers showed high regularity of long-range order evidenced by small angle X-ray diffraction patterns and the lyotropic liquid crystalline phase. The formation mechanism of the hyperbranched-linking-hyperbranched structures and the role of the RAFT agents were investigated.Scheme 1 Mechanism of SCCLP.

Nitrone Mediated Coupling of Hyperbranched Polymer Radicals

“…Report on inter‐hyperbranched polymer radical coupling and its effects on polymer topology is scarce in the literature thus far. Recently, in the course of study on the synergistic self‐condensing vinyl polymerization (SCVP) of an inimer via concurrent controlled radical polymerization methods, we realized that rod‐like nanoparticles could be possibly formed by coupling of hyperbranched polymer blocks. The development of controlled free radical polymerization and SCVP methods has facilitated the production of hyperbranched polymer radicals.…”

Control-synthesized multilayer hyperbranched–hyperbranched polyethers with a tunable molecular weight and an invariant degree of branching

“…Among the various types of HPBs, hyperbranched-linear type core-shell hyperbranched polymers (HLCSPs), which are prepared by attaching linear chains at peripherals of hyperbranched cores, have been reported extensively; [23][24][25] however, hyperbranchedhyperbranched type core-shell polymers (HHCSPs), in which a hyperbranched shell is built on the top of an existing hyperbranched core, have been explored only by a few research groups due to synthesis difficulties and controllability issues. [26][27][28] Compared with HLCSPs, HHCSPs are more effective in producing larger yet controllable inner cavity, [23][24][25] hydrogen storage, and low k materials. Gao et al 29 reported an amphiphilic HHCSP HBP, which could be a potential candidate for self-assembly applications; Xu et al 30 reported a series of HHCSPs with conjugated structures, whose fluorescence emission can be tuned over a wide range of wavelengths by changing the ratio of core to shell.…”