Pushing the Limit of the RAFT Process: Multiblock Copolymers by One-Pot Rapid Multiple Chain Extensions at Full Monomer Conversion

A General Approach to Sequence-Controlled Polymers Using Macrocyclic Ring Opening Metathesis Polymerization

A new and general strategy for the synthesis of sequence-defined polymers is described that employs relay metathesis to promote the ring opening polymerization of unstrained macrocyclic structures. Central to this approach is the development of a small molecule "polymerization trigger" which when coupled with a diverse range of sequence-defined units allows for the controlled, directional synthesis of sequence controlled polymers.

Determining the effect of side reactions on product distributions in RAFT polymerization by MALDI-TOF MS

RAFT polymerization has emerged as one of the most versatile reversible deactivation radical polymerization techniques and is capable of polymerizing a wide range of monomers under various conditions.

Preparation of complex multiblock copolymers via aqueous RAFT polymerization at room temperature

Room temperature RAFT polymerisation for the design of multiblock acrylate/acrylamide copolymers.

Synthesis of well-defined α,ω-telechelic multiblock copolymers in aqueous medium: in situ generation of α,ω-diols

The synthesis of well-defined α,ω-dihydroxyl telechelic multiblock copolymers by sequential in situ chain extensions via aqueous Cu(0) mediated living radical polymerization (SET-LRP) is reported.

Dual side chain control in the synthesis of novel sequence-defined oligomers through the Ugi four-component reaction

The synthesis of sequence-defined oligomers by the iterative application of the modular Ugi four-component reaction (U-4CR) and the efficient thiol–ene addition reaction is described.

Sequence-controlled multi-block copolymerization of acrylamides via aqueous SET-LRP at 0 °C

Aqueous single electron transfer living radical polymerization (SET-LRP) has been employed to synthesize multi-block homopolymers and copolymers of a range of acrylamide monomers including N-isopropylacrylamide (NIPAM), 2-hydroxyethyl acrylamide (HEAA), N,N-dimethyl acrylamide (DMA) and N,N-diethylacrylamide (DEA).

Supramolecular glycopolymers with thermo-responsive self-assembly and lectin binding

Incorporating monomers into sequence-defined synthetic macromolecules endows them to mimic nature which results in key residues being anchored in the molecular recognition pattern.

Ultrafast RAFT polymerization: multiblock copolymers within minutes

A remarkably efficient and versatile procedure for the preparation of multiblock copolymers is presented.

RAFT polymerization and associated reactivity ratios of methacrylate-functionalized mixed bio-oil constituents

High separations costs reduce the practicality of polymers sourced from renewable bio-oils, motivating economical multicomponent bio-oil polymerizations. Thus, this paper investigates polymerization behavior of model bio-oil components and their mixtures.

Photoinduced Sequence-Controlled Copper-Mediated Polymerization: Synthesis of Decablock Copolymers

Photoinitiated copper-mediated radical polymerization offers an one-pot and time efficient method of preparing a decablock copolymer PMA-PtBA-PMA-PDEGA-PMA-PtBA-PMA-PDEGA-PnBA-PDEGA with an overall molecular weight of 8500 g·mol^-1. The molecular weight is in close agreement with theoretical expectations and significantly narrow dispersities (Đ = 1.1-1.17) are achieved for the various block extensions. The tert-butyl group of the decadeblock was deprotected to form PMA-PAA-PMA-PDEGA-PMA-PAA-PMA-PDEGA-PnBA-PDEGA. The deprotection is confirmed by the disappearance of tert-butyl signal and the loss of molecular weight investigated by ¹H NMR and SEC, respectively. The carboxylic group of PAA is protonated in acidic solution (water insoluble) and deprotonated in basic solution (water-soluble). This enables a conformational change of PMA-PAA-PMA-PDEGA-PMA-PAA-PMA-PDEGA-PnBA-PDEGA in water/ethanol mixture (80/20%v/v), as is demonstrated by a turbid solution at pH 2 and transparent solutions at pH 10.

Microstructure and mechanical properties of amphiphilic tetrablock copolymer elastomers via RAFT miniemulsion polymerization: influence of poly[styrene-alt-(maleic anhydride)] segments

Tetrablock copolymer elastomers having poly[styrene-alt-(maleic anhydride)] segment (SMA) were synthesized via RAFT miniemulsion polymerization. Different fractions of SMA led to various morphologies and T_gs, affecting the mechaincal properties.