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Synthesis of new cellulose and other polysaccharide derivatives—XXVI. Synthesis of cellulosehydroxamic and alginohydroxamic acids
1314
Abstracts
lated i'rcm the data cbtainCd for the following sys_tCms: TCI-1T.styrcne, TCHT-acrylonitrile, TCHT-vinyl acetate, TCI-IT-methyl acrylate ar.d TCIIT-methyl methacrylate. The behaviour of TCHT in the copolymerization reaction with butadiene and some chloridecontaiaing monomers has been predicted on the basis of Alfrey and Price's scheme. T H E APPLICATION OF N U C L E A R MAGNETIC RESONANCE IN T H E STUDY OF V U L CANIZATION INDUCED S T R U C T U R A L CHANGES OF F L U O R I N E - C O N T A I N I N G COPOLYMERS
A. N . L y u b i m o v , V. S. N o v i k o v , F . A. G a l i l - O g l y , A. V. G r i b a c h e v a a n d A . F . V a r e n i k , V y s o k o m o l . s o y e d . 5: N o . 5, 6 8 7 - 6 9 2 , 1963. THE influence of temperature on the fluorinated rubber-like copolymers of the type of Vaitons and Kel F-3700 and of vulcanization of Vaitons in the presence of hexamethylenediamine and magnesimn oxide have been investigated with respect to the shape of the fluorine and hydrogen resonance lines. The changes in the lines shapes on compression heating and amine vulcanization of the eopolymers are apparently due to loss hydrogen fluoride or chloride (depending upon the type of the polymer) with the formation of - - C : C - - double bonds in the chains. SYNTHESIS OF N E W CELLULOSE A N D O T H E R P O L Y S A C C H A R I D E D E R I V A T I V E S - XXVI. SYNTHESIS OF C E L L U L O S E H Y D R O X A M I C A N D A L G I N O H Y D R O X A M I C ACIDS
L. S. G a l b r a i k h a n d Z. A. R o g o v i n , V y s o k o m o l . s o y e d . 5: N o . 5, 6 9 3 - 6 9 9 , 1963. NEw derivatives of cellullose and of alginic acid, namely cellulosehydroxamic and alginohydroxamic acids have been synthesized b y treatment of the methyl esters of diearboxycellulose and of alginic acid with an absolute methanol solution of hydroxylamine at room temperature. The m a x i m u m degree of substitution of cellulosehydroxamic acid obtained from dimethylcellulosedicarboxylate with 7 ~ 22.3 corresponds to a y-vahm of about 14 and of alginohydroxamic acid to a ~,-value 7 of about 44. The derivatives form complexes with Fe +3 and Cu +2 ions. The kinetics of binding of Fe+a to cellulosehydroxamic acid have been investigated. I t has been shown t h a t cellulosehydroxamic acid can also be prepared b y oxidation of cellulose 4ialdoximes at room temperature with 30O/o hydrogen peroxide in acid or neutral solution. STUDIES IN P O L Y M E R S Y N T H E S E S - - V I I I . P H O T O P O L Y M E R I Z A T I O N BY LIGHT OF M E T H Y L M E T H A C R Y L A T E IN T H E P R E S E N C E OF DIACETYL
VISIBLE
G. P . G l a d y s h e v a n d S. R . R a f i k o v , V y s o k o m o l . s o y e d . 5: N o . 5, 7 0 0 - 7 0 2 , 1963. THE photopolymerization kinetics of methyhnethacrylate under the influence of light of 2--436 In# in presence of diacetyl have been investigated a t 30.0 and --50 °. The mean lifetime of the radicals was determined b y the rotating sector method and values for Kp/Ko a n d (Ep--E0) were calculated. The molecular weight of the polymer obtained at --50 ° is higher t h a n t h a t of the 30 ° and 0 ° polymer. This is in accord with the collective interaction concept. STUDIES IN P O L Y M E R S Y N T H E S I S - - I X . P O L Y M E R I Z A T I O N OF ACRYLONITRILE B Y VISIBLE LIGHT IN T H E PRESENCE OF CHLORINE
S. R . R a f i k o v , V. A. S e c h k o v s k a y a a n d G. P . G l a d y s h e v , V y s o k o m o l . s o y e d . 5: N o . 5, 7 0 3 - 7 0 5 , 1963. TItE photopolymerization of acrylonitrile in dimethylformamide under the action of visible light a n d in salt solutions in the presence of chloride has been investigated. Optimal conditions have been established for the process in dimethylformamide. The highest degree of polymerization of the monomer is observed at 50 ° and chlorine content of 3 mole ~o.
Abstracts
lated i'rcm the data cbtainCd for the following sys_tCms: TCI-1T.styrcne, TCHT-acrylonitrile, TCHT-vinyl acetate, TCI-IT-methyl acrylate ar.d TCIIT-methyl methacrylate. The behaviour of TCHT in the copolymerization reaction with butadiene and some chloridecontaiaing monomers has been predicted on the basis of Alfrey and Price's scheme. T H E APPLICATION OF N U C L E A R MAGNETIC RESONANCE IN T H E STUDY OF V U L CANIZATION INDUCED S T R U C T U R A L CHANGES OF F L U O R I N E - C O N T A I N I N G COPOLYMERS
A. N . L y u b i m o v , V. S. N o v i k o v , F . A. G a l i l - O g l y , A. V. G r i b a c h e v a a n d A . F . V a r e n i k , V y s o k o m o l . s o y e d . 5: N o . 5, 6 8 7 - 6 9 2 , 1963. THE influence of temperature on the fluorinated rubber-like copolymers of the type of Vaitons and Kel F-3700 and of vulcanization of Vaitons in the presence of hexamethylenediamine and magnesimn oxide have been investigated with respect to the shape of the fluorine and hydrogen resonance lines. The changes in the lines shapes on compression heating and amine vulcanization of the eopolymers are apparently due to loss hydrogen fluoride or chloride (depending upon the type of the polymer) with the formation of - - C : C - - double bonds in the chains. SYNTHESIS OF N E W CELLULOSE A N D O T H E R P O L Y S A C C H A R I D E D E R I V A T I V E S - XXVI. SYNTHESIS OF C E L L U L O S E H Y D R O X A M I C A N D A L G I N O H Y D R O X A M I C ACIDS
L. S. G a l b r a i k h a n d Z. A. R o g o v i n , V y s o k o m o l . s o y e d . 5: N o . 5, 6 9 3 - 6 9 9 , 1963. NEw derivatives of cellullose and of alginic acid, namely cellulosehydroxamic and alginohydroxamic acids have been synthesized b y treatment of the methyl esters of diearboxycellulose and of alginic acid with an absolute methanol solution of hydroxylamine at room temperature. The m a x i m u m degree of substitution of cellulosehydroxamic acid obtained from dimethylcellulosedicarboxylate with 7 ~ 22.3 corresponds to a y-vahm of about 14 and of alginohydroxamic acid to a ~,-value 7 of about 44. The derivatives form complexes with Fe +3 and Cu +2 ions. The kinetics of binding of Fe+a to cellulosehydroxamic acid have been investigated. I t has been shown t h a t cellulosehydroxamic acid can also be prepared b y oxidation of cellulose 4ialdoximes at room temperature with 30O/o hydrogen peroxide in acid or neutral solution. STUDIES IN P O L Y M E R S Y N T H E S E S - - V I I I . P H O T O P O L Y M E R I Z A T I O N BY LIGHT OF M E T H Y L M E T H A C R Y L A T E IN T H E P R E S E N C E OF DIACETYL
VISIBLE
G. P . G l a d y s h e v a n d S. R . R a f i k o v , V y s o k o m o l . s o y e d . 5: N o . 5, 7 0 0 - 7 0 2 , 1963. THE photopolymerization kinetics of methyhnethacrylate under the influence of light of 2--436 In# in presence of diacetyl have been investigated a t 30.0 and --50 °. The mean lifetime of the radicals was determined b y the rotating sector method and values for Kp/Ko a n d (Ep--E0) were calculated. The molecular weight of the polymer obtained at --50 ° is higher t h a n t h a t of the 30 ° and 0 ° polymer. This is in accord with the collective interaction concept. STUDIES IN P O L Y M E R S Y N T H E S I S - - I X . P O L Y M E R I Z A T I O N OF ACRYLONITRILE B Y VISIBLE LIGHT IN T H E PRESENCE OF CHLORINE
S. R . R a f i k o v , V. A. S e c h k o v s k a y a a n d G. P . G l a d y s h e v , V y s o k o m o l . s o y e d . 5: N o . 5, 7 0 3 - 7 0 5 , 1963. TItE photopolymerization of acrylonitrile in dimethylformamide under the action of visible light a n d in salt solutions in the presence of chloride has been investigated. Optimal conditions have been established for the process in dimethylformamide. The highest degree of polymerization of the monomer is observed at 50 ° and chlorine content of 3 mole ~o.