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Effect of various aliphatic hydrocarbons on the cis-1.4 polymerization of butadiene with nickel naphthenate/boron trifluoride etherate/triethylaluminum catalyst was investigated. It was observed that vinylcyclohexene, allenes, and acetylenes retarded the initiation and the propagation and enhanced the chain transfer. The retarding effect is stronger in the order: paraffin, monoolefin < vinylcyclohexene ≦ acetylene < allene = butadiene-1.2 < methylacetylene < vinylacetylene. The microstructure of the polymer is not affected by the presence of these compounds. The retarding effect was discussed in terms of the coordination of the unsaturated hydrocarbons to the catalyst. Die Wirkung verschiedener aliphatischer Kohlenwasserstoffe auf die cis-1.4-Polymerisation von Butadien mit Nickelnaphthenat/Bortrifluoridatherat/Triathylaluminium als Katalysator wurde untersucht. Vinylcyclohexen, Allene und Acetylene verzogern die Initiierung und die Wachstumsreaktion, steigern hingegen die Kettenubertragung. Der Verzogerungseffekt verstarkt sich in der Reihenfolge: Paraffin, Monoolefin < Vinylcyclohexen ≦ Acetylen < Allen = Butadien-(1.2) < Methylacetylen < Vinylacetylen. Die Mikrostruktur des Polymeren wird durch die Gegenwart dieser Stoffe nicht verandert. Es wird versucht, den Retardierungseffekt auf Grund der Koordination zwischen den ungesattigten Kohlenwasserstoffen und dem Katalysator zu erklaren.

Prior to detecting organic ingredients compounded in rubber with ultraviolet absorption spectra, the authors measured ultraviolet spectra of organic ingredients which are used in rubber industry -20 kinds of accelerator, 10 kinds of antioxidant, one kind of scorching-retarder and 7 kinds of softener.The results obtained show that, with some exceptions, organic ingredients can be well detected when the concentration is 1-2mg in 100cc of the solvent.The authors give further brief description of the relation between the chemical constitution and absorption spectra of compounding ingredients with similar chemical structure, and the easiness and difficulty of identification with absorption spectra of each organic compounding ingredient.