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Chemical transformations of polymers—VI. Effect of ultraviolet rays on polyamides in the presence of oxygen and water vapour
982
Abstracts
*SYNTHESIS OF LINEAR POLYMERS FROM UNSATURATED ACID MONOALLYLIC ESTERS BY THE CYCLIC POLYMERIZATION MECHANISM
I . A . A r b u z o v a , S. A. P l o t k i n a a n d O. V. S 0 k o ] o v a , V y s o k o m o l . s o e d i n . 4: N o . 6, 8 4 3 - 8 4 7 , 1962. THE polymerization of the monoallylic esters of unsaturated acids has been investigated. On bulk polymerization at 50-60 ° in the presence of benzoyl peroxide linear polymers of monoallyl maleates and citraconates of molecular weight 15,600-48,000 were obtained. The polymers are soluble in organic solvents. On the basis of residual unsaturation determinations it was concluded t h a t the polymers contain 63-65~o cyclic units. NITROGEN.CONTAINING, POLYMERS WITH PARAMAGNETIC PROPERTIES
V. I . M a l t s e v , V. B. L e b e d e v , V. A. I t s k o v i e h ~ n d A. A. P e t r o v , V y s o k o m o l . s o e d i n . 4: N o . 6, 8 4 8 - 8 5 0 , 1962. INSOLUBLE powders with paramagnetic and semiconductor properties have been obtained on oxidizing aromatic amines (aniline, diphenylamine a n d triphenylamine). The intensity of the E S R signal increases after heating or UV irradiation of the specimens or after passing an electric current through them, or cooling t h e m to ~ 180 °. The products obtained apparently contain quinoid and amine groupings, interaction of which in the solid polymer is of the same nature as t h a t taking place in paramagnetic mixtures of quinone and amine powders or in polyphenyl-aminoquinones. CHEMICAL TRANSFORMATIONS OF POLYMERS--VI. EFFECT OF ULTRAVIOLET RAYS ON POLYAMIDES IN THE PRESENCE OF OXYGEN AND W A T E R VAPOUR
S. 1%. R a f i k o v , S y u i T s i - p i n , V y s o k o m o l . s o e d i n . 4: N o . 6, 8 5 1 - 8 5 9 , 1962. TuE effect of ultraviolet rays on the mixed polyamide G-669 in the presence and absence of oxygen a n d water vapours has been investigated. I t has been found t h a t oxygen enhances photo-chemical degradation a n d crosslinking of the polyamides. The mechanical properties deteriorate and the viscosity of the solutions first diminishes and then increases. The amount of insoluble gel fraction increases with increase in duration of the photo-oxidation and in ~,he hardness of the radiation. The mechanism of the radical-chain processes taking place in the photo-oxidation reaction has been discussed on the basis of the composition of the gases evolved and of the changes in the physico-chemical and mechanical properties of the polyamides. I t has been shown t h a t in the presence of water v a p o u r reaction between the water molecules and macroradicals takes place during photolysis, diminishing gas evolution and structuration. *CONJUGATED BOND POLYMERS WITH HETEROATOMS IN THE CONJUGATED C H A I N n X X I . POLYMERIC COMPLEXES OF TETRACYANETHYLENE
A. A . B e r l i n , N . G. M a t v e y e v a , s o e d i n . 4: N o . 6, 8 6 0 - 8 6 8 , 1962.
A. I. Sherle and N. D. Kostrova, Vysokomol.
POLYMERIC complex compounds have been obtained for the first time on reaction between tetraeyanethylene with copper, iron a n d magnesium aeetylaeetonates, b o t h in the presence a n d absence of solvents as well as with various metals. The porymers are black, non-melting substances, partially soluble in dimethylformamide, pyradine, triethanolaznine and
Abstracts
*SYNTHESIS OF LINEAR POLYMERS FROM UNSATURATED ACID MONOALLYLIC ESTERS BY THE CYCLIC POLYMERIZATION MECHANISM
I . A . A r b u z o v a , S. A. P l o t k i n a a n d O. V. S 0 k o ] o v a , V y s o k o m o l . s o e d i n . 4: N o . 6, 8 4 3 - 8 4 7 , 1962. THE polymerization of the monoallylic esters of unsaturated acids has been investigated. On bulk polymerization at 50-60 ° in the presence of benzoyl peroxide linear polymers of monoallyl maleates and citraconates of molecular weight 15,600-48,000 were obtained. The polymers are soluble in organic solvents. On the basis of residual unsaturation determinations it was concluded t h a t the polymers contain 63-65~o cyclic units. NITROGEN.CONTAINING, POLYMERS WITH PARAMAGNETIC PROPERTIES
V. I . M a l t s e v , V. B. L e b e d e v , V. A. I t s k o v i e h ~ n d A. A. P e t r o v , V y s o k o m o l . s o e d i n . 4: N o . 6, 8 4 8 - 8 5 0 , 1962. INSOLUBLE powders with paramagnetic and semiconductor properties have been obtained on oxidizing aromatic amines (aniline, diphenylamine a n d triphenylamine). The intensity of the E S R signal increases after heating or UV irradiation of the specimens or after passing an electric current through them, or cooling t h e m to ~ 180 °. The products obtained apparently contain quinoid and amine groupings, interaction of which in the solid polymer is of the same nature as t h a t taking place in paramagnetic mixtures of quinone and amine powders or in polyphenyl-aminoquinones. CHEMICAL TRANSFORMATIONS OF POLYMERS--VI. EFFECT OF ULTRAVIOLET RAYS ON POLYAMIDES IN THE PRESENCE OF OXYGEN AND W A T E R VAPOUR
S. 1%. R a f i k o v , S y u i T s i - p i n , V y s o k o m o l . s o e d i n . 4: N o . 6, 8 5 1 - 8 5 9 , 1962. TuE effect of ultraviolet rays on the mixed polyamide G-669 in the presence and absence of oxygen a n d water vapours has been investigated. I t has been found t h a t oxygen enhances photo-chemical degradation a n d crosslinking of the polyamides. The mechanical properties deteriorate and the viscosity of the solutions first diminishes and then increases. The amount of insoluble gel fraction increases with increase in duration of the photo-oxidation and in ~,he hardness of the radiation. The mechanism of the radical-chain processes taking place in the photo-oxidation reaction has been discussed on the basis of the composition of the gases evolved and of the changes in the physico-chemical and mechanical properties of the polyamides. I t has been shown t h a t in the presence of water v a p o u r reaction between the water molecules and macroradicals takes place during photolysis, diminishing gas evolution and structuration. *CONJUGATED BOND POLYMERS WITH HETEROATOMS IN THE CONJUGATED C H A I N n X X I . POLYMERIC COMPLEXES OF TETRACYANETHYLENE
A. A . B e r l i n , N . G. M a t v e y e v a , s o e d i n . 4: N o . 6, 8 6 0 - 8 6 8 , 1962.
A. I. Sherle and N. D. Kostrova, Vysokomol.
POLYMERIC complex compounds have been obtained for the first time on reaction between tetraeyanethylene with copper, iron a n d magnesium aeetylaeetonates, b o t h in the presence a n d absence of solvents as well as with various metals. The porymers are black, non-melting substances, partially soluble in dimethylformamide, pyradine, triethanolaznine and