Showing papers in "Transactions of The Faraday Society in 1936"

X-ray spectrography of polymers and in particular those having a rubber-like extensibility

Abstract: For many years Staudinger defended the theory that polymers have—in the simplest ease—a long chain form of molecules, in which a certain small unit repeats itself regularly along the chain, the units being united by primary valencies. His arguments were not, however, at the beginning of 1927, sufficiently convincing. The decisive argument was forthcoming shortly afterwards by the application of x-ray spectrography. I would like to begin this article by bringing a few personal memories about this development. At the meeting of the Naturforscherversammlung in Innsbruck in September, 1924, I first heard him defend this theory, especially for the ease of polyoxymethylenes, but also for some other cases. Neither I myself nor some others to whom I spoke were convinced by his very interesting exposition. His conception seemed possible, but, many of us thought, not proved. And the whole subject did not yet look attractive to many of us. At the meeting of the Naturforscherversammlung in Dusseldorf in Sept...

The formation of high polymers by condensation between metallic poly-sulphides and dihalogenated hydrocarbons and ethers

Abstract: The general theory of formation of high molecular weight linear polymers by condensation between bifunctional compounds of low molecular weight to form products of large molecular mass has been so thoroughly reported in the literature that no extensive citation is believed to be advisable here. A very thorough study of this type of reaction has been made by Carothers and his co-workers on the formation of polyesters, the reaction being of the general type: One can, without taxing the imagination, conceive of the polymerization of isoprene or butadiene as belonging to the same general type of phenomenon, differing only in the fact that the reacting molecules are alike instead of different and that the “condensate” is one double bond per molecule. Therefore, no attempt will be made in this paper to distinguish between condensation and polymerization. When organic dihalides having CH2X terminals, in which “X” denotes a halogen, are caused to react with metallic polysulfides, MSxM, there usually resu...