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Previous workers have reported that lattice constants determined by electron diffraction differ from the accepted X-ray values. It has been suggested that these differences may be due to a change in lattice constant with crystal size. To examine this question further, the lattice constants of several alkali halides ha…
Abstract Polysoaps are defined as polymers to whose chain soap molecules are attached. Through the reaction of poly‐2‐vinylpyridine with n ‐dodecyl bromide such a polysoap was prepared in which 33.7% of the nitrogens were quarternized. This polysoap exhibited reduced viscosities in aqueous solution which were smaller…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrinsic Viscosity Relationships for Polystyrene1T. G Fox Jr. and P. J. FloryCite this: J. Am. Chem. Soc. 1951, 73, 5, 1915–1920Publication Date (Print):May 1, 1951Publication History Published online1 May 2002Published inissue 1 May 1951https://pubs.acs.org/doi/10.1021/ja0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTParticle Size in Suspension PolymerizationF. H. Winslow and W. MatreyekCite this: Ind. Eng. Chem. 1951, 43, 5, 1108–1112Publication Date (Print):May 1, 1951Publication History Published online1 May 2002Published inissue 1 May 1951https://pubs.acs.org/doi/10.1021/ie50497a031h…
Films of polyamides were exposed to heat, ultra-violet radiant energy, and different atmospheric conditions. The degradation products were collected in some cases and analysed by mass-spectrometric techniques. The unexposed and exposed specimens were examined by the following techniques to obtain information concernin…
Fracturing, or scabbing, of a material near a free surface as the result of a transient compressional stress wave of high intensity impinging on that surface has been observed for many years; however, little quantitative data that relate the fracture to the nature of the stress wave and the physical properties of the…
The short-time tensile breaking strength of various grades of graphite was measured as a function of temperature from room temperature to the sublimation point. A characteristic common to all the strength versus temperature curves is that the strength approximately doubles in going from room temperature to about 2500°…
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Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. L. Bond; Making Small Spheres. Rev Sci Instrum 1 May 1951; 22 (5): 344–345. https://doi.org/10…
Existing calculations on the tunnel effect through thin films in contacts apply to very weak and very strong electric fields. It is the main purpose of the present paper to complete the picture by the treatment of intermediate cases, which are important for many contact applications.
The lattice and grain boundary self-diffusion coefficients of high purity silver have been measured over extended temperature ranges. It has been found that the lattice diffusion coefficients are described by the equation, DL=0.895 exp(−49500/RT) cm2 sec−1 and are independent of the thermal history of the crystals wit…
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