HEMA-Styrene Triblock Copolymers and Polyether-Segmented Polyamides

2 HEMA-Styrene Triblock Copolymers and Polyether-Segmented Polyamide [Pg.25]

In 1976, Okano, Shinohara et al. [77] synthesized, by radical polymerization processes, a triblock (A-B-A) copolymer, consisting of HEMA (A) and styrene (B) [Pg.25]

Okano et al. [78-80] found that HEMA-STY triblock copolymer formed a typical domain structure when it was cast into a film. The domain structure changed with the HEMA mole fraction, and the lamella structured surface (mole fraction of HEMA 0.61 lamella width 30-50 nm) exhibited the best blood-compatibility. [Pg.25]

To control the sequence length of HEMA-STY triblock copolymer, Okano et al. [81] later adopted the anionic living-polymerization method. Junction [Pg.25]

Okano et al. [84] measured changes in cytoplasmic Ca2+ concentrations in platelets adhering to HEMA-STY block copolymer (HSB) surfaces by means of fluorescence microscopy combined with a high performance image processor. Comparative studies were also carried out with the HEMA-STY random (HSR) copolymer of poly HEMA and polystyrene. Their results showed that cytoplasmic free calcium levels in platelets that were in contact with the HEMA-STY [Pg.26]

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