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Polymerization of some heterocyclic compounds in the presence of a complex organometallic catalyst
Abstracts *ORGANORBORON BORONATE
COMPOUNDS -- LXIII.
POLYMERIZATION
171 OF D I B U T Y L
VINYL-
B. M. M i k h a i l o v a n d P. M. A r o n o v i c h , V y s o k o m o l . soedin. 3: No. 6, 861-864, 1961. DI.n-BUTYL vinylboronate polymerizes under the action of oxygen or heat. It copolymerizes
with vinylethyl ether and with styrene. REACTION OF B U T Y L O R T H O T I T A N A T E
WITH DIMETHYLDIACETOXYSILANE
A. L. S u v o r o v a n d S. S. S p a s s k i i , V y s o k o m o l . soedin. 3: No. 6, 865-869, 1961. THE reaction of butylorthotitanate with dimethyldiaeetoxysilane in various, molar proportions led to dimethyldibutoxysilane and polytitanoxanes instead of the expected polyorganotitanosiloxanes. A scheme of the reaction has been proposed, based on the assumption that butoxy groups in butylorthotitanate are substituted for acetoxy groups, followed by heterofunctional condensation of the resultant alkoxytitanacetates. * P O L Y M E R I Z A T I O N OF SOME HETEROCYCLIC COMPOUNDS IN T H E P R E S E N C E OF A COMPLEX O R G A N O M E T A L L I C CATALYST
A. V. T o p c h i e v , Y u . Ya. G o l d f a r b a n d B. A. K r e n t s e l , V y s o k o m o l . soedin. 3: No. 6, 870-876, 1961. Tile polymerization of furan, thiophene, a-methylfuran and dihydropyren in the presence of an organometallic catalyst consisting of triethylaluminum and titanium triehloride has been investigated. The optimal temperature conditions and molar ratios of the catalyst components have been established. The thermomechanical and spectral properties of polyfuran and polysylvan have been investigated. The X.radiograms of these polymers bear evidence of their being amorphous. * T H E AGING OF P O L Y M E T H Y L M E T H A C R Y L A T E ON E X P O S U R E TO L I G H T - II. R A D I O A C T I V E 14C CARBON S T U D Y OF T H E P H O T O D E G R A D A T I O N PROCESS
M. I. F r o l o v a , L. V. N e v s k i i a n d A. V. R y a b o v , V y s o k o m o l soedin. 3: No. 6, 877-881, 1961. TitE photodegradation of polymethylmethacrylate in vacuum proceeds with the formation of gaseous products of which one is methyl formate. I t has been shown with the aid of radioactive i4C that the formation of gaseous products in the photodegradation of polymethylmethaerylate takes place largely as the result of elimination of ester side chains. * F R E E R A D I C A L REACTIONS IN I R R A D I A T E D POLYTETRAFLUOROETHYLENE-HI. R E C O M B I N A T I O N OF A L K Y L F L U O R I D E A N D P E R O X I D E R A D I C A L S
Yu. D. T s v e t k o v , Ya. S. L e b e d e v a n d V. V. V o e v o d s k i i , V y s o k o m o l . s o e d i n 3: No. 6, 882-890, 1961. TIlE kinetics and rate constants of recombination of peroxide and alkylfluoride radicals in irradiated teflon of various degrees of crystallinity have been determined with the aid of the ER method. The recombination has been shown to be a second order reaction, the The Publisher will be pleased to quote for the supply of a full English translation of aaly abstracted in these pages.
COMPOUNDS -- LXIII.
POLYMERIZATION
171 OF D I B U T Y L
VINYL-
B. M. M i k h a i l o v a n d P. M. A r o n o v i c h , V y s o k o m o l . soedin. 3: No. 6, 861-864, 1961. DI.n-BUTYL vinylboronate polymerizes under the action of oxygen or heat. It copolymerizes
with vinylethyl ether and with styrene. REACTION OF B U T Y L O R T H O T I T A N A T E
WITH DIMETHYLDIACETOXYSILANE
A. L. S u v o r o v a n d S. S. S p a s s k i i , V y s o k o m o l . soedin. 3: No. 6, 865-869, 1961. THE reaction of butylorthotitanate with dimethyldiaeetoxysilane in various, molar proportions led to dimethyldibutoxysilane and polytitanoxanes instead of the expected polyorganotitanosiloxanes. A scheme of the reaction has been proposed, based on the assumption that butoxy groups in butylorthotitanate are substituted for acetoxy groups, followed by heterofunctional condensation of the resultant alkoxytitanacetates. * P O L Y M E R I Z A T I O N OF SOME HETEROCYCLIC COMPOUNDS IN T H E P R E S E N C E OF A COMPLEX O R G A N O M E T A L L I C CATALYST
A. V. T o p c h i e v , Y u . Ya. G o l d f a r b a n d B. A. K r e n t s e l , V y s o k o m o l . soedin. 3: No. 6, 870-876, 1961. Tile polymerization of furan, thiophene, a-methylfuran and dihydropyren in the presence of an organometallic catalyst consisting of triethylaluminum and titanium triehloride has been investigated. The optimal temperature conditions and molar ratios of the catalyst components have been established. The thermomechanical and spectral properties of polyfuran and polysylvan have been investigated. The X.radiograms of these polymers bear evidence of their being amorphous. * T H E AGING OF P O L Y M E T H Y L M E T H A C R Y L A T E ON E X P O S U R E TO L I G H T - II. R A D I O A C T I V E 14C CARBON S T U D Y OF T H E P H O T O D E G R A D A T I O N PROCESS
M. I. F r o l o v a , L. V. N e v s k i i a n d A. V. R y a b o v , V y s o k o m o l soedin. 3: No. 6, 877-881, 1961. TitE photodegradation of polymethylmethacrylate in vacuum proceeds with the formation of gaseous products of which one is methyl formate. I t has been shown with the aid of radioactive i4C that the formation of gaseous products in the photodegradation of polymethylmethaerylate takes place largely as the result of elimination of ester side chains. * F R E E R A D I C A L REACTIONS IN I R R A D I A T E D POLYTETRAFLUOROETHYLENE-HI. R E C O M B I N A T I O N OF A L K Y L F L U O R I D E A N D P E R O X I D E R A D I C A L S
Yu. D. T s v e t k o v , Ya. S. L e b e d e v a n d V. V. V o e v o d s k i i , V y s o k o m o l . s o e d i n 3: No. 6, 882-890, 1961. TIlE kinetics and rate constants of recombination of peroxide and alkylfluoride radicals in irradiated teflon of various degrees of crystallinity have been determined with the aid of the ER method. The recombination has been shown to be a second order reaction, the The Publisher will be pleased to quote for the supply of a full English translation of aaly abstracted in these pages.