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ABA block-type copolymers with poly(2-methacryloyloxyethyl phosphorylcholine(MPC)) as the middle B segment and poly(glycidyl methacrylate(GMA)) as the A segments (PMbG) were synthesized by an activator regenerated by electron transfer (ARGET) atom transfer radical polymerization (ATRP). The PMbGs were reactive copolymers, as the epoxide group available in the poly(GMA) segment could be chemically...
Photoinduced atom transfer radical polymerization (ATRP) has promising applications because it requires small amounts of transition metal catalysts and low temperatures, and can be extended to numerous monomers. We investigated the photoinduced ATRP of 2-methacryloyloxyethyl phosphorylcholine (MPC) in a polar medium and prepared block-type copolymers with a poly(MPC) segment. Polymerizations in methanol...
To functionalize polyurethane, a novel synthetic reaction of diol compounds derived from methacrylates with various functional groups was investigated. The methacrylates were reacted with α-thioglycerol via a Michael-type addition to obtain the corresponding diol compounds under mild conditions. In this reaction, diisopropylamine was a much better catalyst than triethylamine. The conversion was dependent...
Poly(2-(methacryloyloxy)ethyl phosphorylcholine)-b-poly(N-isopropylacrylamide-co-2-(N,N-dimethylamino)ethyl methacrylate) (pMPC-b-p(NIPAM/DMA)) was synthesized via reversible addition-fragmentation chain transfer (RAFT) controlled radical polymerization. Below the critical aggregation temperature (CAT), i.e., about 40 °C, the diblock copolymer dissolved in water as a unimer with a hydrodynamic radius...
Hydration of polymer chains plays a key role for determining the extent of protein adsorption on polymeric materials. Here we investigated the hydration of poly(2-methacryloyloxyethyl phosphorylcholine (MPC)) chains, which resist protein adsorption and following cell adhesion effectively. The hydration was compared with that of poly(methoxy oligo(ethylene glycol)-monomethacrylate (Me(EG) n ...
A novel polymer blend comprising polyethylene (PE) and poly(vinyl acetate) (PVAc) with a biocompatible surface was developed for fabricating medical devices. This blend was obtained by a new synthetic method using supercritical carbon dioxide fluid. Further, the acetyl group on the surface of this blend was converted to the hydroxyl group following the phosphorylcholine (PC) group. Surface analysis...
We investigated the water structure and the mechanical properties of 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer hydrogels cross-linked with a novel hydrophilic 2-(methacryloyloxy)ethyl-[N-(2-methacryloyloxy)ethyl]phosphorylcholine (MMPC) for soft contact lenses (SCL) applications and commercial methacrylic cross-linkers were in addition used for comparison with MMPC. Water structure in...
Hydrogels containing 2-methacryloyloxyethyl phosphorylcholine (MPC) moieties were prepared from aqueous solutions with water-soluble poly[MPC-co-methacrylic acid (MA)] (PMA) and poly[MPC-co-n-butyl methacrylate (BMA)] (PMB). We had found that the hydrogel would swell under acidic pH and dissociate under neutral and alkaline conditions. Investigating these properties together with the complex modulus...
As a novel cross-linking reagent, dimethacrylate having a phosphorylcholine-like linkage, called 2-(methacryloyloxy)ethyl-[N-(2-methacryloyloxy)ethyl]phosphorylcholine (MMPC), was synthesized by condensation between methacrylate having a cyclic phosphate and that with a tertiary amine group. The MMPC was copolymerized with 2-methacyloyloxyethyl phosphorylcholine (MPC) or 2-hydroxyethyl methacrylate...
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