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Five commercially available materials were tested as impregnating agents for paper. They were Elvanol 5105, Kelgin LV, Klucel G, Methocel A15C and Viscarin GP209. Whatman no. 1 chromatography was used as support and solutions o.1% and 1% w/v used. Dry oven ageing was at 100 C. For upto 14 days. At the lower concentration none of the solutions increased paper strength, at 1% Kelgin, Methocel and Viscarin only. After ageing Methocel was best, Viscarin the worst (for folding endurance). Colour changes, ph changes were small for all materials. All the materials were completely soluble in water, partially soluble in toluene, after 16 hours at 120 C. Tables, references.

The cleavage of poly(vinyl alcohol) in dimethyl sulfoxide at 42°C has been measured viscometrically in the presence of tert-butyl hydroperoxide and metal complexes. Phthalocyanine complexes of copper(II), iron(III), cobalt(II), and vanadium as VO(II) as well as hemin, hematin, chlorophyllin, and cytochrome c were used. The rates of decomposition of tert-butyl hydroperoxide in the presence of these metal complexes were measured idometrically. These data are compared to results obtained with other metal complexes in similar reactions.

Data for the tert-butyl hydroperoxide-initiated polymerization of styrene in dilute benzene solution at 126°C. are presented. These data are discussed in terms of Tobolsky's limiting conversion kinetics. Several rate laws are considered. Simple unimolecular decomposition of the peroxide appears to be unimportant under these conditions, as does solvent interaction.