Showing papers by "Meyer Steinberg published in 1965"
TL;DR: Several properties of polyethylene, synthesized by Co60 gamma radiation have been investigated in this article, including molecular weight, molecular weight distribution, density, methyl group content, crystalline melting point, and melt index.
Abstract: Several properties of polyethylene, synthesized by Co60 gamma radiation have been investigated. The polymerization reactions were carried out in static experiments over a wide range of conditions. Measurements include molecular weight, molecular weight distribution, density, methyl group content, crystalline melting point, and melt index. The density of polyethylene formed at 20°C. was found to be 0.94 g./cc. This value appears to be independent of pressure from 170 to 1700 atm. and radiation intensity from 0.58 × 105 to 4.7 × 105 rads./hr. Increasing temperature results in increasing methyl group content and a decrease in density to 0.91 g./cc. at 200°C. The polymers formed, over the entire range of experimental conditions, were completely soluble in o-dichlorobenzene at 135°C. Intrinsic viscosities were determined and their dependence on temperature, pressure, intensity, and radiation dose are shown. An attempt was made to correlate melt index to molecular weight and molecular weight distribution.
4 citations
TL;DR: The nature of charged particle -complex nuclei reaction cross sections suggests an isotope conversion accelerator in which a circulating beam kept at constant energy repeatedly traverses a thin target as discussed by the authors.
Abstract: The nature of charged particle - complex nuclei reaction cross sections suggests an isotope conversion accelerator in which a circulating beam kept at constant energy repeatedly traverses a thin target. Statistical deviations in target energy loss and emergent direction induce betatron and synchrotron oscillations. These limit the number of traversals before particle loss, but to useable values. However, the requirements of storage ring injection may reduce the advantage of this accelerator over conventional types.
1 citations