The semigrafted copolymers combine linear and brush topologies, whereas block brushes consist of two different grafted segments.
The backyard is not particularly child-friendly, since the far end slopes downhill and ends with a low fence blocking brush.
The final block-brush copolymer was synthesized by the click reaction between these two polymer precursors.
The phase transition temperature of block-brush copolymer increased with the decrease of pH value.
At higher pH values, the block-brush copolymer aggregated intermolecularly into the micelles during the phase transition.
The responsive behaviors of block-brush copolymer were studied by laser light scattering, temperature-dependent turbidity measurement and micro differential scanning calorimetry.
Well-defined dually responsive block-brush copolymer of poly ethylene glycol -b-[poly N-isopropylacrylamide -g-poly(N,N-dimethylamino-ethylmethacrylate)], [PEglycol -b-[poly N-isopropylacrylamide -g-polyared by the combination of atom transfer radical polymerization (ATRP) and click chemistry based on azide-capped PDMAEMA and alkyne-pendinglycol -b-[poly N-isopropylacrylamide -g-poly
Recently, Zhang et al. (Zhang et al. 2010) reported the preparation of block-brush copolymer of [PEG-block-P NIPAM-graft-PDMAEMA)] by the combination of ATRP and click chemistry as dually thermo- and pH-responsive copolymer.
Herein, four kinds of functionalized graphene oxide nanosheets (FGOs) bearing polymer brushes (phosphoric acid brushes, imidazole brushes, acid-base or base-acid block copolymer brushes) are designed exquisitely, and then embedded into two typical polymer matrixes (acidic sulfonated poly ether ether ketone) and basic chitosan) to prepare composite membranes.
Various topological polymers such as block and brush polymers were produced from strain-promoted azide-alkyne cycloaddition reaction (SPAAC) using the resultant dibenzocyclooctyne end functionalized poly methyl methacrylate)/polystyrene as building blocks.
It is found that the fibrillar nanophases were formed with the length of about 400 nm and the diameter of about 15 nm via reaction-induced microphase separation mechanism while this cylindrical block copolymer brush was incorporated into epoxy thermosets.
