Stereospecific Polymerization of Isoprene |
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Page vii
... cationic mechanisms 2. Cationic coordination mechanisms B2 . Anionic mechanisms 1. Classical anionic mechanisms . 2. Anionic coordination mechanisms C. Mechanisms of polymerization using Ziegler - Natta catalyst systems C1 . Free ...
... cationic mechanisms 2. Cationic coordination mechanisms B2 . Anionic mechanisms 1. Classical anionic mechanisms . 2. Anionic coordination mechanisms C. Mechanisms of polymerization using Ziegler - Natta catalyst systems C1 . Free ...
Page 35
... Cationic mechanisms Any compound able to convert a double bond into a carbonium ion is a virtual catalyst for cationic polymerization . Polymerization can occur only when thermodynamic ... Cationic mechanisms "Classical" cationic mechanisms.
... Cationic mechanisms Any compound able to convert a double bond into a carbonium ion is a virtual catalyst for cationic polymerization . Polymerization can occur only when thermodynamic ... Cationic mechanisms "Classical" cationic mechanisms.
Page 247
... cationic surfactant ( cationic electrolyte ) . Anionic electrolytes can be salts of fatty acids , sulphonated higher alcohols , etc. , while cationic electrolytes are ami- noaliphatic salts , quaternary ammonium salts , etc. Some ...
... cationic surfactant ( cationic electrolyte ) . Anionic electrolytes can be salts of fatty acids , sulphonated higher alcohols , etc. , while cationic electrolytes are ami- noaliphatic salts , quaternary ammonium salts , etc. Some ...
Contents
Introduction | 3 |
Stereospecific catalysts | 17 |
Mechanisms of stereospecific polymerization | 29 |
Copyright | |
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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