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In parts I and II the effect of melt time and temperature on dispersed dispersion particles of various molecular weights was described: substantial molecular motion on the substrate occurs with the development of both planar folded chain single crystals, and single molecule single crystals and banded structures with parallel double-striations oriented along the long axis of the crystal or band. The...
Poly(trimethylene terephthalate) (PTT) has been polymerized at temperatures between 150 and 220°C as extended chain lamellar single crystals, ca 100Å thick, by the confined thin film melt polymerization (CTFMP) technique. The crystal structure, determined from electron diffraction patterns and modeling using the Cerius2 simulation program is compared with that of solution grown crystals from higher...
Large (up to 0.5 mm) single crystals of two liquid crystalline polymers, poly(p-oxybenzoate) (PpOBA) and the presumably random copolymer poly(m-oxybenzoate/2,6-oxynaphthoate) (1/1) [P(mOBA/ONA)], have been grown by the confined thin film melt polymerization technique at 180–200°C. These large, thick ‘macro’ crystals, as well as single disclination domains, form in regions in which the ‘monomer melt’...
Small angle X-ray diffraction (SAXD) was used to locate mucopolysaccharides (MPS) at regular intervals along the collagen axis under physiological conditions. Ruthenium red was used to stain the MPS specifically. The difference in electron density between ruthenium red-stained and unstained moist native rat tail tendon should correspond to the position of the MPS. This difference was calculated from...
X-ray scattering data are presented on solutions of wild cucumber mosaic virus and the associated “top component” particles which have little or no RNA. The radii of gyration are 112Å and 135Å for bottom and top component, respectively. The radial density distribution within each particle is calculated by Fourier inversion of the scattered amplitudes. The virus particle or bottom component has approximately...
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