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The effect of pressure from 60 to over 400 kbar has been measured on the resistance of selenium and iodine. Selenium exhibits a very rapid drop in resistance between 60 and 128 kbar; at 128 kbar it shows a discontinuous drop. At higher pressures its behavior is apparently metallic. Iodine shows a rapid drop in resista…
The thermal conductivity of single crystals of Ca${\mathrm{F}}_{2}$, Mn${\mathrm{F}}_{2}$, Co${\mathrm{F}}_{2}$, and Zn${\mathrm{F}}_{2}$ has been measured over the temperature range from 3\ifmmode^\circ\else\textdegree\fi{}K to 300\ifmmode^\circ\else\textdegree\fi{}K. In this series, Ca${\mathrm{F}}_{2}$ and Zn${\mat…
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Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Roger C. Millikan, "Optical Properties of Soot," J. Opt. Soc. Am. 51, 698-699 (1961) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation aler…
A perturbation expansion in powers of ${{r}_{s}}^{\ensuremath{-}\frac{1}{2}}$ has been used to investigate the ground-state energy of a dilute electron gas, the result being, in rydberg units per particle, $E=\ensuremath{-}\frac{1.792}{{r}_{s}}+\frac{2.66}{{{r}_{s}}^{\frac{3}{2}}}+\frac{b}{{{r}_{s}}^{2}}+O(\frac{1}{{{…
Samples of TiO 2 of various colours (bluish black to yellowish white) were obtained by heating TiO2 at 1400 C. under oxygen of increasing pressure. At that temperature the dissociation pressure is about 2/3 arm. (in oxygen). The homogeneity region of the phase extends from about TiO~.gsa to TiO2.000 (39.845 to 40.05%…
In laboratory trials on samples from individual fleeces solvent degreasing has shown a higher yield than aqueous alkaline scouring. Differences of 0.5% to 1.4% of clean dry fiber are found when solvent degreasing is compared with traditional soap-soda scouring. Evidence is presented showing that the difference in yiel…
Abstract Extensive fatigue tests of vulcanizates of natural rubber and SBR were carried out using a cycle of alternate stretching in two perpendicular directions. It is shown that the data can be best handled statistically by assuming a lognormal distribution or by the use of extreme probability techniques. Illustrati…
Samples of polydivinylbenzene (PDVB) and of copolymers of styrene with divinylbenzene (DVB) and with trivinylbenzene (TVB) were pyrolyzed in a vacuum in the temperature range of 346 to 450 °C. The volatile products were collected in two fractions: A heavy fraction volatile at the temperature of pyrolysis and a light f…
Abstract Neoprene vulcanizates crystallize most rapidly at —12° C. The temperature at which a vulcanizate is crystallized determines the minimum temperature at which it will thaw, the thaw point being approximately 15° C higher than the crystallization temperature over the range studied. Brittleness temperature is not…
Previous investigations on the solution properties of sodium carboxymethylcellulose (CMC) have led to the conclusion that crystalline cellulose regions, remaining after processing act as binding or crosslinking sites for the establishment of a fraction comprised of swollen gels or aggregates in solution. The present p…
The assumptions used in theoretical predictions of the tensile properties of twisted continuous-filament yarns are critically discussed. A modified theory, based on constant yarn volume during extension, is derived, and theoretical and experimental values of modulus are compared. Expressions for yarn extension and bre…
As a preliminary to the investigation of the ternary systems Li 2 O‐B 2 O 3 ‐P 2 O 5 and Li 2 O‐SiO 2 ‐P 2 O 5 the existence of the previously reported lithium ortho‐, pyro‐, and metaphosphate compounds was confirmed. A rapid, reversible inversion takes place in Li 4 P 2 O 7 at 630°C. New data on the melting points, o…
The optical absorption properties of Co60-irradiated fused silica and crystalline quartz have been studied in the vacuum-ultraviolet region. The most prominent absorption band found in both materials has a maximum at 7.6 ev (1620 A). Optical and thermal bleaching experiments indicate that this band is not necessarily…
Abstract The mechanical properties of rubberlike composite propellants and similar filled elastomers are determined largely by the volume fraction of filler, the visco-elastic properties of the binder, and the interactions between the binder and filler particles. The ratio of the quasi-equilibrium modulus of the compo…
The dielectric relaxation in two polyamides has been studied over a temperature range from -100 to 175 °C and a frequency range from 50 c/s to 10 Mc/s. The effects of various thermal treatments on the relaxation behavior and density, X-ray diffraction, and intrinsic viscosity have been studied. The polyamides were pol…