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Synthesis of new cellulose and other polysaccharide derivatives—XVII. Synthesis of graft copolymers of cellulose and polymethylvinylpyridine
Abstracts
357
investigated. The polymerization rates were correlated with the surface areas of the polymericmonomeric particles. A quantitative relation has been presented for the dependence between the mean polymerization coefficient and the initiator and emulsifer concentrations. I t has been shown t h a t the total polymeric-monomeric surface area does not change with increase in concentration of azoisobutyrodinitrile at constant emulsifier MK concentration or with change in the extent of conversion. 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 - XVII. SYNTHESIS OF G R A F T COPOLYMERS OF CELLULOSE A N D P O L Y M E T H Y L VINYLPYRIDINE
Ytt. G. K r y a z h e v 1961.
a n d Z. A. l ~ o g o v i n , V y s o k o m o l . s o e d i n . 3: N o . 12, 1 8 4 7 - 1 8 5 2 ,
CELLULOSE--POLYMETHYLVINYLPYRIDINE graft copolymer has been synthesized. The influence
of various factors on the composition of copolymer has been investigated. A method has been developed for grafting from an aqueous solution of methylvinylpyridine, the monomer concentration in the solution being constant. The resultant copolymers possess anion exchange properties with an exchange capacity up to 3-4 mg-eq. HCt/g. P H O S P H O R Y L A T I O N OF POLYMERS B Y P H O S P H O R U S P E N T A S U L P H I D E
G. F . B e b i k h , V. K . K u s k o v a n d I. V. G u r y a n o v a , V y s o k o m o l . s o e d i n . 3: N o . 12, 1853-I856, 196l. ]-IIGH molecular phosphinic acids have been prepared by phosphorylating synthetic rubber (SKB), polystyrene, polyethylene and phenolaldehyde resins with phosphorus pentasulphide. The products possess ion-exchange properties. * ESTIMATION OF T H E P A C K I N G DENSITY OF SOLID P O L Y M E R S - - I I I . CRYSTALLINE POLYMERS
A . A. T a g e r , M. V. T s i l i p o t k i n a a n d D. M. R o m a n o v ~ , N o . 12, 1857-1859, 1961.
V y s o k o m o l . s o e d i n . 3:
THE sorption of the vapours of inert liquids on tt~ree crystalline polymers-polyethylene, polytetrafluoroethylene and saran has been investigated. The nature of the sorption isotherms bears evidence of a high packing density of the chains in all three polymers and is in complete agreement with modern views as to the two-phase structure of crystalline polyethylene and polytetrafluoroethylene. * ESTIMATION OF T H E P A C K I N G D E N S I T Y POLYSTYRENE
OF SOLID P O L Y M E R S - - I V .
ISOTACTIC
A. A. T a g e r a n d M. V. T s i l i p o t k i n a , V y s o k o m o l . s o e d i n . 3: N o . 12, 1860-1862, 1961. TIIE sorption of methyl alcohol vapours on isotactic amorphous and crystalline polystyrene has been investigated. Calculation has been made of the specific surface area and of the pore radius. I t has been shown t h a t in contrast to atactic polystyrene, isotactic polystyrene The Publisher will be pleased to quote for tile supply of a full English translation of any paper abstracted in these pages. 24*
357
investigated. The polymerization rates were correlated with the surface areas of the polymericmonomeric particles. A quantitative relation has been presented for the dependence between the mean polymerization coefficient and the initiator and emulsifer concentrations. I t has been shown t h a t the total polymeric-monomeric surface area does not change with increase in concentration of azoisobutyrodinitrile at constant emulsifier MK concentration or with change in the extent of conversion. 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 - XVII. SYNTHESIS OF G R A F T COPOLYMERS OF CELLULOSE A N D P O L Y M E T H Y L VINYLPYRIDINE
Ytt. G. K r y a z h e v 1961.
a n d Z. A. l ~ o g o v i n , V y s o k o m o l . s o e d i n . 3: N o . 12, 1 8 4 7 - 1 8 5 2 ,
CELLULOSE--POLYMETHYLVINYLPYRIDINE graft copolymer has been synthesized. The influence
of various factors on the composition of copolymer has been investigated. A method has been developed for grafting from an aqueous solution of methylvinylpyridine, the monomer concentration in the solution being constant. The resultant copolymers possess anion exchange properties with an exchange capacity up to 3-4 mg-eq. HCt/g. P H O S P H O R Y L A T I O N OF POLYMERS B Y P H O S P H O R U S P E N T A S U L P H I D E
G. F . B e b i k h , V. K . K u s k o v a n d I. V. G u r y a n o v a , V y s o k o m o l . s o e d i n . 3: N o . 12, 1853-I856, 196l. ]-IIGH molecular phosphinic acids have been prepared by phosphorylating synthetic rubber (SKB), polystyrene, polyethylene and phenolaldehyde resins with phosphorus pentasulphide. The products possess ion-exchange properties. * ESTIMATION OF T H E P A C K I N G DENSITY OF SOLID P O L Y M E R S - - I I I . CRYSTALLINE POLYMERS
A . A. T a g e r , M. V. T s i l i p o t k i n a a n d D. M. R o m a n o v ~ , N o . 12, 1857-1859, 1961.
V y s o k o m o l . s o e d i n . 3:
THE sorption of the vapours of inert liquids on tt~ree crystalline polymers-polyethylene, polytetrafluoroethylene and saran has been investigated. The nature of the sorption isotherms bears evidence of a high packing density of the chains in all three polymers and is in complete agreement with modern views as to the two-phase structure of crystalline polyethylene and polytetrafluoroethylene. * ESTIMATION OF T H E P A C K I N G D E N S I T Y POLYSTYRENE
OF SOLID P O L Y M E R S - - I V .
ISOTACTIC
A. A. T a g e r a n d M. V. T s i l i p o t k i n a , V y s o k o m o l . s o e d i n . 3: N o . 12, 1860-1862, 1961. TIIE sorption of methyl alcohol vapours on isotactic amorphous and crystalline polystyrene has been investigated. Calculation has been made of the specific surface area and of the pore radius. I t has been shown t h a t in contrast to atactic polystyrene, isotactic polystyrene The Publisher will be pleased to quote for tile supply of a full English translation of any paper abstracted in these pages. 24*