Hydride Transfer and the Molecular weight Distribution of Polypropylene

Abstract

the same surface tension as the solvent, yields solubility values for the noble gases which agree with the measured values within an order of magnitude.Measurements in other solvents presently in progress at this Laboratory will be needed to test the usefulness of this correlation.Acknowledgments.-The authors are especially indebted to Dr. P. H. Emmett who first suggested to them the surface tension model used in the present correlation. Many interesting and valuable discussions with Drs. F. F. Blankenship and R. F. Newton are gratefully acknowledged. We are also grateful to Mr. W. D. Harman and associates who were responsible for mass-spectrometric analysis of the many samples submitted.

Active Nitrogen.

“…The latter would be unlikely because the imine radicals formed on the first step -would very likely disproportionate to nitrogen and hydrogen. The mechanism described in reactions ( 48), (49), and (50) can also be adapted to these results, if one assumes that reaction (50) yields an imine radical or NH3 directly.…”

Possible Implications of the Damage by Radiation in the Storage of Propellants in Outer Space and Tentative Methods for Its Measurement

“…Experiments are in progress at many laboratories, and semiconductive devices with sensitivities of several hundredths of a nanoanapere per doses of one roentgen per hour have already been obtained. 4. APPENDIX.…”

The preparation of ultra narrow molecular weight distribution poly(ethylene glycol)s by fractional crystallization from solution

“…[1][2][3] Fractional crystallization, fractional precipitation, turbidimetric titration, chromatography, and ultrafiltration are some of these techniques. Among these methods, fractional crystallization and fractional precipitation techniques were frequently used for the fractionation of semicrystalline polymers such as polyethylene, 4,5 polypropylene, [6][7][8] and polystyrene. 9 Fractional crystallization can be applied directly from dilute solution of polymer and the melt phase.…”