Stereospecific Polymerization of Isoprene |
From inside the book
Results 1-3 of 11
Page 180
... electron donors change the energy state of the surface of the catalyst complex and activate even the less active ... donor effect is a result of various simultaneous interactions which depend upon the structure of the metal alkyl , the ...
... electron donors change the energy state of the surface of the catalyst complex and activate even the less active ... donor effect is a result of various simultaneous interactions which depend upon the structure of the metal alkyl , the ...
Page 181
... electron donor / aluminium alkyl ratios is tedious , discontinuous and time- consuming . Among the physico - chemical methods , electrical conductivity measure- ments determine the optimum electron donor / aluminium alkyl ratio . The ...
... electron donor / aluminium alkyl ratios is tedious , discontinuous and time- consuming . Among the physico - chemical methods , electrical conductivity measure- ments determine the optimum electron donor / aluminium alkyl ratio . The ...
Page 182
Elena Ceaușescu. optimal electron donor / aluminium alkyl ratio for a Ziegler - Natta catalyst complex with a maximum ... electron donors results in an increased conductivity , it was assumed that complete dissociation and complexing of ...
Elena Ceaușescu. optimal electron donor / aluminium alkyl ratio for a Ziegler - Natta catalyst complex with a maximum ... electron donors results in an increased conductivity , it was assumed that complete dissociation and complexing of ...
Contents
Introduction | 3 |
Stereospecific catalysts | 17 |
Mechanisms of stereospecific polymerization | 29 |
Copyright | |
31 other sections not shown
Other editions - View all
Common terms and phrases
5A molecular sieves acetylenic hydrocarbons active sites AIR3 Al/Ti molar ratio aluminium alkyl anionic antioxidants atoms butadiene carbonyl compounds catalyst components catalyst concentration cationic CH₂ chain characteristics Chem cis-1,4-polyisoprene cm³ isoprene/100 content of cis-1,4 conversion cyclopentadiene deactivating agent decreases dl/g double bond Effect electron donor elongation at break ethylene formation fraction of purity free radical gel content H H H hexane hexane fraction hydrocarbons impurities influence initiation intrinsic viscosity ionic isopentane isoprene fraction isoprene polymerization kgf/cm² kinetic macromolecular maximum mechanism microstructure mixture molecular sieves molecular weight monomer n-heptane NATTA nitrogen obtained olefins optimum oxidation oxygen paramagnetic paramagnetic centres physico-mechanical properties polyisoprene polymer polymer solution polymerization of isoprene polymerization rate polymerization reaction polymers prepared propagation purification reaction rate removal samples shown in Figure solvent stabilizers stereoregularity stereospecific polymerization synthesized Table TIBA TIBA/100 g isoprene titanium tetrachloride toluene transition metal triethylaluminium triisobutylaluminium volumetric flow rate Ziegler-Natta-type catalyst complexes