ω-Unsaturated methacrylate macromonomers as reactive polymeric stabilizers in mini-emulsion polymerization

Abstract

Polymer latexes of poly(benzyl methacrylate) P(BzMA) were synthesized by mini-emulsion polymerization, using hexadecane as the hydrophobe and ω-unsaturated methacrylate-based macromonomers as a reactive stabilizer. The amphiphilic macromonomers were synthesized by...

Progress in process parameters and mechanism research of polymer emulsion preparation

“…The preparation methods of macromonomer mainly include microemulsion free radical polymerization, sequential free radical polymerization, copolymerization, ring-opening transposition polymerization, and counter-emulsion polymerization, among which the most widely used is free radical polymerization. Booth J. R. 23 using hexadecane as a hydrophobic agent and u-unsaturated methacrylate-based monomers as reaction stabilizers, synthesized poly(benzyl methacrylate) (P(BzMA)) polymer latex monomers via emulsion free-radical polymerization. Through catalytic chain transfer emulsion polymerization (CCTP), they were able to synthesize amphiphilic macromolecular monomers.…”

Sulfur-free and Surfactant-free RAFT-Mediated Hybrid Emulsion Polymerization: A Model System for Understanding the Controlled Synthesis of Hybrid Latex-Encapsulating Pigment

“…Heuts et al. − compounded poly­(methacrylic acid) macromonomers by CCTP, used the macromonomers for batch and semibatch emulsion polymerization of methyl methacrylate (MMA) and butyl acrylate (BA), and obtained steady polymer latex. Bon et al − carried out polymerization-induced self-assembly (PISA) in the absence of monomers using macromonomers as seed emulsions. The cross-linked micellar dispersion of macromonomers can be used as nanogel stabilizers in emulsion polymerization to prepare patchy, Janus, and armored polymer particles. − In our previous work, amphiphilic macromonomer poly­(methacrylic acid- co -methyl methacrylate) P­(MAA- co -MMA) was synthetized in situ on the C.I.…”

Sulfur‐Free Radical RAFT Polymerization of Methacrylates in Homogeneous Solution: Design of exo‐Olefin Chain‐Transfer Agents (R−CH2C(=CH2)Z)

“…This emulsion polymerization was further used for the synthesis of multiblock polymers with different methacrylates via slow continuous monomer addition. [ 21 , 22 , 23 , 24 , 25 ] Although the chain‐transfer constants of the exo ‐olefin‐terminated polymers are not very high ( C tr ≈0.2),[ 26 , 27 ] the emulsion polymerization that occurs in a confined space, into which the added monomer is slowly supplied from monomer droplets emulsified in the aqueous phase, allows substantially fast chain transfer in comparison to propagation and diminishes termination to enhance molecular weight control. However, sulfur‐free RAFT polymerization in homogeneous solutions is still a major challenge in radical polymerization.…”