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Crystallization of polyethylene (PE) blends of low and high molecular weight components under shear flow was studied using time-resolved depolarized light scattering (DPLS), focusing on effects of the high molecular weight component on the shish–kebab structure formation. Anisotropic two-dimensional scattering pattern due to shish-like structure formation was observed above a certain concentration...
We have studied structure formation during crystallization of polyethylene (PE) under shear flow using time resolved depolarized light scattering (DPLS) in order to elucidate the formation mechanism of the so-called shish-kebab structure. Two-dimensional (2D) DPLS pattern clearly showed streak-like scattering normal to the flow direction in the early stage during the crystallization after pulse shear,...
We performed neutron reflectivity measurements on deuterated polystyrene thin films supported on silicon substrate as a function of temperature. In order to see effects of annealing on the thickness, the films were annealed at 80 °C for 12 h and 135 °C for 12 h, termed weakly and strongly annealed films, respectively. One of the main purpose of this study is to see if the negative expansivity reported...
The compatibility of PSSNa and PVSNa in aqueous solution has been studied. PSSNa and PVSNa are compatible when the total concentration is less than 1.0mol/l, but phase separation occurs when the total concentration exceeds 1.0mol/l. The cloud point curve is of a typical UCST type. Addition of salt causes a shift of the boundary toward a lower concentration. It may be considered that these new critical...
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