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Issue 41, 2019
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Understanding copolymerisation kinetics for the design of functional copolymers via free radical polymerisation

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Abstract

Determining the monomer sequence distribution of copolymers is important when correlating copolymer molecular structure (random, gradient etc.) to macroscopic/material properties. We report here the relative monomer reactivities for the copolymerisation of methyl methacrylate (MMA) with functional monomers – poly(ethylene glycol) methyl ether methacrylate (PEGMEM Mn 500 g mol−1), acetonide-protected dopamine methacrylamide (ADMA), methacrylic acid (MAA) and glycidyl methacrylate (GMA) – to provide information on monomer sequence distribution and compositional drift. Reactivity ratios were calculated, using non-linear least squares regression analysis, in the cases of the free radical copolymerisation of MMA with (i) PEGMEM (rMMA = 1.17 rPEGMEM = 0.62) and (ii) ADMA (rMMA = 2.21 rADMA = 0.17). Additionally, monomer feed depletion as a function of total monomer conversion was monitored by 1H NMR spectroscopy for a series of batch co- and terpolymerisations. This approach offers detailed insight into monomer compositional drift and copolymerisation kinetics. Such information provides a platform for the design of copolymers with specific desired properties e.g. adhesion, solubility or interfacial activity.

Graphical abstract: Understanding copolymerisation kinetics for the design of functional copolymers via free radical polymerisation

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Publication details

The article was received on 28 Aug 2019, accepted on 07 Oct 2019 and first published on 08 Oct 2019


Article type: Paper
DOI: 10.1039/C9PY01294J
Polym. Chem., 2019,10, 5665-5675

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    Understanding copolymerisation kinetics for the design of functional copolymers via free radical polymerisation

    N. A. Boulding, J. M. Millican and L. R. Hutchings, Polym. Chem., 2019, 10, 5665
    DOI: 10.1039/C9PY01294J

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