- Email: [email protected]
Interaction of cellulose with liquids
ABSTRACTS FROM PAPERS PUBLISHED IN V Y S O K O M O L E K U L I A R N Y E SOEDINENIIA Vot. 1, No. 5. 1 9 5 9 " ON HETEROCHAIN P O L Y E S T E R S - X V I I I . POLYESTERS OF o-XYLYLENGLYCOL
S. V. V i n o g r a d o v a , V. V. K o r s h ~ k , V y s o k o m o l . s o e d i n . 1: No. 5, 6 4 9 - 6 5 5 , 1959. THE synthesis and study have been carried out of polyesters of o-xylylenglycol and aliphatie and aromatic acids of various structure. The effect of the reagent structure on the properties of the polyesters has beea discussed. Comparison of the polyesters of o-xylylenglycol with the corresponding polyesters of tetramethylenglycol and p-xylenglycol showed that the former largely possessed lower softening temperatures than the latter, which evidently is connected ~-ith diminished packing density of the polymer chains of the o-xylylenglycol polyesters. owing to the ortho-position of the methylol groups in the glycol. The polyesters of o-xylylenglycol and aliphatic dicarboxylic acids are dense, viscous liquids; the polyesters of o-xylylenglycol and aromatic dicarboxylic acids amorphous solids.
ON HETEROCHAIN POLYESTERS--XIX. POLYESTERS OF QUINITE
S. V. V i n o g r a d o v a , V. V. K o r s h a k , V y s o k o m o l . s o e d i n . 1: No. 5, 6 5 6 - 6 6 1 , 1959. THE synthesis and study have been carried out of polyesters of quinite and aliphatic and aromatic dicarboxylie acids of various structure. The effect of the reagent structure on the polyester properties has been discussed. Polyesters of trans-quinite are solids with higher softening temperattlres than those of the corresponding polyesters of tertamethylcnglycol. The polyesters cf c~s-quinite are characterized by lower softening temperatures than the corresponding polyesters of trans-quinitc. The properties of the quinite polyesters have been shown to be intimitely connected with the structure of the dicarboxylic acid used in their synthe,qi~.
INTERACTION OF CELLULOSE WITH LIQUIDS
K . P. M i s c h e n k o , S. L. T a l m u d , V. I. I a k i m o v ~ , V y s o k o m o l . s o e d i n , h No. 5, 6 6 2 - 6 6 9 , 1959. TIlE heats of interaction of various kinds of cellulose with different liquids have been measured in an ordinary type of calorimeter. From the heat effects the values for the specific surface area of cellulose have been calculated and the results compared with experimental determinations. I t has been pointed out that the specific surface area of cellulose cannot be calculated from the heat effect, since the latter is the sum of a n u m b e r of effects associated with different processes taking place on contact of the cellulose with liquid. The heat of adsorption has been calculated. On adsorption of water vapor it constitutes ~ 3 per cent of the over-all heat effect as determined ealorimetrically. * English abstracts reprinted from Vysokomol. soedin, h No.5, 1959. 325
S. V. V i n o g r a d o v a , V. V. K o r s h ~ k , V y s o k o m o l . s o e d i n . 1: No. 5, 6 4 9 - 6 5 5 , 1959. THE synthesis and study have been carried out of polyesters of o-xylylenglycol and aliphatie and aromatic acids of various structure. The effect of the reagent structure on the properties of the polyesters has beea discussed. Comparison of the polyesters of o-xylylenglycol with the corresponding polyesters of tetramethylenglycol and p-xylenglycol showed that the former largely possessed lower softening temperatures than the latter, which evidently is connected ~-ith diminished packing density of the polymer chains of the o-xylylenglycol polyesters. owing to the ortho-position of the methylol groups in the glycol. The polyesters of o-xylylenglycol and aliphatic dicarboxylic acids are dense, viscous liquids; the polyesters of o-xylylenglycol and aromatic dicarboxylic acids amorphous solids.
ON HETEROCHAIN POLYESTERS--XIX. POLYESTERS OF QUINITE
S. V. V i n o g r a d o v a , V. V. K o r s h a k , V y s o k o m o l . s o e d i n . 1: No. 5, 6 5 6 - 6 6 1 , 1959. THE synthesis and study have been carried out of polyesters of quinite and aliphatic and aromatic dicarboxylie acids of various structure. The effect of the reagent structure on the polyester properties has been discussed. Polyesters of trans-quinite are solids with higher softening temperattlres than those of the corresponding polyesters of tertamethylcnglycol. The polyesters cf c~s-quinite are characterized by lower softening temperatures than the corresponding polyesters of trans-quinitc. The properties of the quinite polyesters have been shown to be intimitely connected with the structure of the dicarboxylic acid used in their synthe,qi~.
INTERACTION OF CELLULOSE WITH LIQUIDS
K . P. M i s c h e n k o , S. L. T a l m u d , V. I. I a k i m o v ~ , V y s o k o m o l . s o e d i n , h No. 5, 6 6 2 - 6 6 9 , 1959. TIlE heats of interaction of various kinds of cellulose with different liquids have been measured in an ordinary type of calorimeter. From the heat effects the values for the specific surface area of cellulose have been calculated and the results compared with experimental determinations. I t has been pointed out that the specific surface area of cellulose cannot be calculated from the heat effect, since the latter is the sum of a n u m b e r of effects associated with different processes taking place on contact of the cellulose with liquid. The heat of adsorption has been calculated. On adsorption of water vapor it constitutes ~ 3 per cent of the over-all heat effect as determined ealorimetrically. * English abstracts reprinted from Vysokomol. soedin, h No.5, 1959. 325