Pyrolysis of a commercial flexible urethane foam in an inert atmosphere was investigated by use of GCMS and chemical ionization mass spectroscopy. Pyrolysis products were identified and quantified at four pyrolysis temperatures. A mechanism is discussed in terms of the identified products.

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A new crossed-beam apparatus for the study of ion–molecule collision processes is described. Among the novel features of this apparatus are a high pressure ’’chemical ionization’’ ion source, an apertureless exponential ion deceleration lens, a product ion mass/energy analyzer that can be scanned in angle through nearly a full octant of a sphere, and a supersonic nozzle molecular beam source. The high pressure source can be used to produce vibrationally relaxed ground state reactant ions, and the deceleration lens produces focused ion beams with energies as low as 0.1 eV at intensities equal to the space-charge limit.

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This article describes the preparation and properties of urethane elastomers based on hydroxyl-terminated polybutadienes. The liquid nature of these polybutadiene systems allows easy reaction with isocyanates even at ambient temperatures. Properties of elastomers produced can be easily improved by either chemical modification of the polymer backbone of the polybutadiene or the addition of solid reinforcing fillers, such as carbon black or clay. This article further describes the preparation of stable prepolymers of polybutadiene which can then be reacted with various diol or diamine chain extenders. Conceptually, the elastomers resulting from this technology would combine the properties of rubbers in having the ability to be oil extended or filler reinforced as well as having the high performance of cast urethane systems.