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Optical Properties of Soot
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…
Energy, Specific Heat, and Magnetic Properties of the Low-Density Electron Gas
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}{{{…
The TiO2 phase explored by the lattice constant and density method
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%…
Comparative Wool Scouring Studies
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…
Biaxial Fatigue Testing Of Vulcanizates
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…
Thermal stability of polydivinylbenzene and of copolymers of styrene with divinylbenzene and with trivinylbenzene
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…
First and Second Order Transitions in Neoprene
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…
Solution properties of water-soluble polymers. I. Control of aggregation of sodium carboxymethylcellulose (CMC) by choice of solvent and/or electrolyte
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…
15—The Mechanics of Twisted Yarns: Theoretical Developments
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…
Studies in Lithium Oxide Systems: X, Lithium Phosphate Compounds
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…
Vacuum-Ultraviolet Absorption Studies of Irradiated Silica and Quartz
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…
Viscoelastic Properties of Rubberlike Composite Propellants and Filled Elastomers
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…
Dielectric properties of polyamides: polyhexamethylene adipamide and polyhexamethylene sebacamide
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…
The glass temperatures of polyacrylonitrile and acrylonitrile–vinyl acetate copolymers
The glass-transition temperatures Tg of various copolymers of acrylonitrile and vinyl acetate were measured by observing the linear expansion of molded discs. For vinyl acetate contents of 0 to 27 wt-.% the glass temperature is constant at 87°C. This value agrees with the results of Kolb and Izard for pure polyacrylon…
Die Hauptdielektrizitätskonstanten der homogen geordneten kristallinflüssigen Phase des p-Azoxyanisols
An hochgereinigtem 4,4′-Di-methoxy-azoxybenzol (p,p′-Azoxyanisol) wurden die Hauptdielektrizitätskonstanten ε 1 und ε 2 und die dielektrische Anisotropie Δε der nematischen kristallinflüssigen Phase bei 0,10; 0,26; 0,65 und 1,60 MHz gemessen. Die Ergebnisse werden mit der in einer früheren Veröffentlichung entwickelte…
The Anisotropy of Young's Modulus in Drawn Polyethylene
The macroscopic physical properties of a partially crystalline polymer become anisotropic when the polymer is `drawn', i.e. when the polymer undergoes a large permanent deformation from its isotropic state. The anisotropy of refractive index, X-ray scattering etc. has been investigated by many workers. In this paper t…