Poly propyl isocyanate

The authors also investigated the rod-coil block copolymer consisting of poly(3-(triethoxysilyl)propyl isocyanate) (23 kg/mol) (PIC) as a rigid rod and polystyrene (39 kg/mol) (PS) as a coil block [56]. Initial isotropic solutions of rod-coils undergo multiple ordering transitions until a final smectic microdomain structure develops in the dry state. The intermediate nematic... 

Poly(arylene ethers) are obtained from -propyl isocyanate blocked highly aromatic bisphenols and difluoroarenes. In this manner polsrmers containing hole (electron) transport moieties are obtained (97). 

Figure 27 Scanning force microscopy (SFM) phase image of polystyrene-block-poly(3-[triethoxysilyl]propyl isocyanate) film cast on glass and schematic drawing of the evaporation-indued hierarchical morphology. The initial nematic phase reorders into a smectic-layered state and finally crystallizes creating 90° tilt boundaries. (Reprinted from J.-W. Park and E.L Thomas. Adv. Mater. 15 585,2003. Copyright [2003] Wiley-VCH. With permission.)...

Figure 11.16 viscosity as a function of polymer concentration for the system poly(50% -hexyl + 50% n-propyl) isocyanate of = 41,000 in toluene at 25°C. (From Ref 51.)... 

The carboxylic groups of mesoporphyrin-lX 15 b) and mesohemin-IX 15 c) were converted into isocyanate groups 15 d, e). The reaction with hydroxji group containing crosslinked polymers like poly(2-hydroxyethylmethacrylate) or sephadex (with hydroxy-propyl groups) in pyridine at room temperature led to fixed porjAyrins 20 a, b). 

Here advantage is taken of modification by swelling and adsorption of chemically reactive modifiers and catalysts into the polymer to generate different functional groups. It has been shown that the pendant hydroxyl groups of polyvinyl alcohol (PVA) and poly-2-hydroxy propyl methacrylate can partially be reacted with acetic or benzoic anhydride or phenyl isocyanate to form new structures [44], to form side groups with ester linkages. As a result a copolymer of is produced ... 

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