Rodlike polymers, morphologies

Thus, SANS and microscopy observations, in a complementarily fashion, revealed that the aggregates evolve one from another with decreasing temperature and form a hierarchical morphology having multiple sized structures. The micrographs also provided an indirect proof of the thin polymeric rods. The crystallization of C24 wax into one-dimensional objects in the presence of PEB-7.5 is driven by the existence of the primordial rodlike polymer aggregates, which dictate the overall morphology. The polymer rods are decorated by the wax and can be indirectly detected via microscopy (Fig. 62). 

X-ray reflectivity studies and II-A isotherms revealed a similar model in which the dendrons project the hydrophUic crowns into the water phase and the hydrophobic chains perpendicular to the interface. Amphiphihc dendronized polymers that adopt a cylindrical, rodlike morphology, projecting hydrophihc and hydrophobic dendrons on opposite faces of the stmcture, form stable monolayers exhibiting collapse pressures of approximately 20mN/m (Fig. 11.41). 

Polyphosphazenes. Single crystals of N P Cl. were grown on a variety of alkali halide crystals. The resuitant morphology of the trimer and polymer was identical and of 2 distinct types pyramidal or square shaped crystals, and rodlike crystals. All crystals were oriented in the substrate s <110> directions independent of method of crystallization. Representative films from vapor and solution depositions are shown in figures 2 and 3. 

Fig. 3.3 (a) Schematic picture of the inhomogeneously disordered state of metallic and insulating conducting polymers. (b) Schematic picture of rodlike and coil-like morphology of disordered regions. 

The morphology of ferrocene-containing polymers has been examined in some detail. In the block copolymer of poly(ferrocenyldimethylsilane-b-dimethyl-siloxane) (PFDMS-b-PDMS) with a 1 6 block ratio long rodlike micelles are observed rather than spherical structures in a variety of PDMS-selective n-alkane solvents when the solutions are prepared at or near ambient temperature. The reasons for these observations are subsequently discussed in detail. A further series of mixed ferrocene cobaltocenium dendrimers have been obtained these have been prepared in the reaction of the acyl chlorides of ferrocene and the cobaltocenium PF " with polypropylene dendrimers. ... 

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