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Arylamines substituted with 3,5-di-tertbutyl-4-hydroxybenzyl fragments: Synthesis and inhibiting properties
customer-oriented solutions in this area. Through gentle pelletization and the use of special additives, the recyclates in many cases attain virtually the same properties as the virgin material. In the subsequent compounding process, a recyclate with defined properties is produced under continuous control. The in-house laboratory tests the products and documents them in acceptance test certificates.
Arylamines substituted with 3,5-di-tertbutyl-4-hydroxybenzyl fragments: Synthesis and inhibiting properties Mukmene\w N.A., Cherezova, E. N., Rusina, 1.F., Shuninn, E. L., Zoikov, G. E., Russian Academy ofSciences, Moscorv, Russia in Polymer Degrudution wd Stubilit_v, Vol 68, Issue I. 2000. The synthesis of some substituted arylamines is described. These substances were tested as antioxidants. both in liquid hydrocarbons and in polymers. Their effectiveness was compared with common additives and some conclusions about possibility of their use is made.
Preparation and performance of cellulose acetate-polyurethane blend membranes and their applications - II Sivakrannr, M.. Malaisnm~, R., Sujitho, C.J., Mnhcm, D., Mohnn, V., Rangar@m, R., Nutional University of Sirlgapnre, Singupore in Journcrl of’ Memhwle Science, Vol 169, Issue 2. 2000. Characterization and application of ultrafiltration membranes are of great interest today. both as a tool in choosing the proper membrane for the filtration system used and in the development of new and better membranes. Cellulose acetate was blended with polyurethane in a polar solvent in the presence of polyvinylpyrrolidone as an additive. The effects of polymer composition and additive concentration on membrane compaction. pure water flux. water content. membrane hydraulic resistance and morphological studies were discussed. Measurement of transmembrane flux and appropriate macro solute rejection during stirred ultrafiltration of aqueous solutions of proteins and metal ions chelated with polyethyleneimine were carried out individually using CA/PU blend membranes.
02000 Elsevier Science
Success through colour Dumoulin, Luud, Lupresa, Giuseppe, in Kunststofe Plust Europe, Vnl 90 Issue 3, 2000. Alongside geometric shapes, coloring effects are another particularly successful means to attract attention. The use of the fluorescent effect for this purpose is reviewed. Fluorescent coloring agents are divided into the plasticssoluble dyes and the plastics-nonsoluble pigments. The benefits of each are discussed, presenting their methods of application.
Dynamically formed poly (vinyl alcohol) ultrafiltration membranes with good anti-fouling characteristics Nu, Li, Zhongzhou, Liu, Shuguang, Xu, Chinese Academy of Sciences, Beijing, China in Journal of Membrane Science, Vol 169, Issue I, 2000. The anti-fouling poly (vinyl alcohol) TFC membranes were dynamically prepared when an aqueous solution containing poly (vinyl alcohol), cross-linking agents and additives passed through porous substrate membranes under definite pressure followed by heat treatment resulting in cross-linking reaction and drying. By means of dead-end filtration the poly (viny1 alcohol) solution deposited on the surface and entered the pores of porous substrate and thus an even poly (vinyl alcohol) gel layer was formed on both the external and internal surface. The effects of poly (vinyl alcohol) concentration, dynamic coating time, additive concentration. cross-linking agent concentration, curing time and support membrane on pure water flux and protein rqjection of the resultant membranes were studied. Membrane morphology was characterized by SEM studies. The modified membranes were investigated in ultrafiltration experiments with pepsin to assess their resistance to fouling. The experimental results prove that modified membranes with an even poly (vinyl alcohol) hydrogel layer show dramatically high anti-fouling characteristics compared to inadequately modified and unmodified membranes. Moreover, it is possible that a series of dynamic membranes within broader molecular weight cut-off can be readily obtained by suitable control and combination of various preparative conditions.
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Arylamines substituted with 3,5-di-tertbutyl-4-hydroxybenzyl fragments: Synthesis and inhibiting properties Mukmene\w N.A., Cherezova, E. N., Rusina, 1.F., Shuninn, E. L., Zoikov, G. E., Russian Academy ofSciences, Moscorv, Russia in Polymer Degrudution wd Stubilit_v, Vol 68, Issue I. 2000. The synthesis of some substituted arylamines is described. These substances were tested as antioxidants. both in liquid hydrocarbons and in polymers. Their effectiveness was compared with common additives and some conclusions about possibility of their use is made.
Preparation and performance of cellulose acetate-polyurethane blend membranes and their applications - II Sivakrannr, M.. Malaisnm~, R., Sujitho, C.J., Mnhcm, D., Mohnn, V., Rangar@m, R., Nutional University of Sirlgapnre, Singupore in Journcrl of’ Memhwle Science, Vol 169, Issue 2. 2000. Characterization and application of ultrafiltration membranes are of great interest today. both as a tool in choosing the proper membrane for the filtration system used and in the development of new and better membranes. Cellulose acetate was blended with polyurethane in a polar solvent in the presence of polyvinylpyrrolidone as an additive. The effects of polymer composition and additive concentration on membrane compaction. pure water flux. water content. membrane hydraulic resistance and morphological studies were discussed. Measurement of transmembrane flux and appropriate macro solute rejection during stirred ultrafiltration of aqueous solutions of proteins and metal ions chelated with polyethyleneimine were carried out individually using CA/PU blend membranes.
02000 Elsevier Science
Success through colour Dumoulin, Luud, Lupresa, Giuseppe, in Kunststofe Plust Europe, Vnl 90 Issue 3, 2000. Alongside geometric shapes, coloring effects are another particularly successful means to attract attention. The use of the fluorescent effect for this purpose is reviewed. Fluorescent coloring agents are divided into the plasticssoluble dyes and the plastics-nonsoluble pigments. The benefits of each are discussed, presenting their methods of application.
Dynamically formed poly (vinyl alcohol) ultrafiltration membranes with good anti-fouling characteristics Nu, Li, Zhongzhou, Liu, Shuguang, Xu, Chinese Academy of Sciences, Beijing, China in Journal of Membrane Science, Vol 169, Issue I, 2000. The anti-fouling poly (vinyl alcohol) TFC membranes were dynamically prepared when an aqueous solution containing poly (vinyl alcohol), cross-linking agents and additives passed through porous substrate membranes under definite pressure followed by heat treatment resulting in cross-linking reaction and drying. By means of dead-end filtration the poly (viny1 alcohol) solution deposited on the surface and entered the pores of porous substrate and thus an even poly (vinyl alcohol) gel layer was formed on both the external and internal surface. The effects of poly (vinyl alcohol) concentration, dynamic coating time, additive concentration. cross-linking agent concentration, curing time and support membrane on pure water flux and protein rqjection of the resultant membranes were studied. Membrane morphology was characterized by SEM studies. The modified membranes were investigated in ultrafiltration experiments with pepsin to assess their resistance to fouling. The experimental results prove that modified membranes with an even poly (vinyl alcohol) hydrogel layer show dramatically high anti-fouling characteristics compared to inadequately modified and unmodified membranes. Moreover, it is possible that a series of dynamic membranes within broader molecular weight cut-off can be readily obtained by suitable control and combination of various preparative conditions.
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