Muratova A.

Pudovik A.

Sushentsova F.

Zoreva N.

Polymer Science U S S R

Kazan Federal University Digital Repository

298 A .N .  PUDOVIK et al. contrast o the highly elastic state in which the relaxation time is less than the time of an experiment. Consequently, the difference in the coefficients of thermal expansion in the vitreous and highly elastic states can be considered as a charac- teristic of the degree of absence of equilibrium of the polymer at temperatures below the glass point. The dependence of zlfl on log P shown in Fig. 6 is clear from the experimental material considered above. CONCLUSIONS (1) The specific volume of PMMA plasticized with DBP has been studied as a function of the temperature and pressure. (2) It has been shown that when a plasticizer is added the pressure above which an increase in Tg begins is lowered. This fact is explained by a diminution in the free volume in the polymer on plasticization. (3) At pressures above 2000 kg/cm ~, Tg rises very slightly because of the disappearance of the free volume in the polymer to such an extent that the intermolecular interaction increases little with the pressure. Translated by B. J. HAZZAlCD REFERENCES 1. S. A. ARZHAKOV, G. L. SLONIMSKII, B. P. SHTARKMAN and V. A. KARGIN, Vyso- komoL soyed. 5: 1854, 1963 2. N. I. SHISHKIN, Zh. tekh. fiz. 26: 1056, 1955 3. T. ALFREY, G. COLDFINGER and H. MARK, J. Appl. Phys. 14: 700, 1943 HETEROCHAIN POLYMERS WITH PHOSPHORUS AND OXYGEN ATOMS IN THE MAIN CHAIN. POLYPHOSPHONOPHOSPHATES AND POLYPHOSPHONATES* A.  N .  PUDOVIK ,  A.  A .  MURATOVA,  F .  F .  SUSI-IENTSOVA and N. M. ZOREVA V. I. Lenin Kazan' State University (Received 1 December 1962) THE most intensely studied representatives of linear heterochain polymers con- taining phosphorus and oxygen in the main chain are the polyphosphates ofcomposition Me,,+2[P~O3n÷l] or M% [H2P~Oa,~+ I], where Me represents potassium or sodium and n is from 1 to 10 e [1]. At a polymerization coefficient n~10,  these are solid water-soluble glass-like polymers. * Vysokomol. soyed. 6: No. 2, 258-264, 1964. 

Heterochain polymers with phosphorous and oxygen atoms in the main chain. Polyphosphonophosphates and polyphosphonates

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Heterochain polymers with phosphorous and oxygen atoms in the main chain. Polyphosphonophosphates and polyphosphonates

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