Poly(glycidyl methacrylate) (PGMA) has been synthesised by cobalt catalysed chain transfer polymerisation (CCTP) yielding, in one step, polymers with two points for post polymerisation functionalisation; the activated terminal vinyl bond and in chain epoxide groups. Epoxide ring-opening and a combination of thiol-Michael addition and epoxide ring-opening has been used for the post-functionalisation with amines and thiols to prepare a range of functional materials.
Waterborne polymer films made from soft polymer latex
dispersions
generally suffer from deterioration of chemical resistance and physical
barrier properties under high humidity conditions and upon solvent
exposure. Here we demonstrate the fabrication of robust polyhedral
cellular polymer films from poly(methyl methacrylate-co-butyl acrylate) latexes, which were made by emulsion polymerization
using a 2-ureido-4-pyrimidinone (UPy) functional methacrylate comonomer.
Multiple hydrogen bond (MHB) arrays provided by UPy groups arrest
the film formation process thereby creating a cellular reinforcement.
The cellular polymer films exhibit impressive physical and mechanical
properties. Upon solvent exposure, the films show colloidal crystalline-type
Bragg diffraction features and do not suffer excessive and deteriorative
uptake of water and, more remarkably, can absorb high amounts of organic
solvents, thereby turning into an organogel with preservation of shape,
up to a 14-fold volumetric swelling ratio of the polymer films in
case of chloroform.
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