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A number of unreported zinc complexes based on tridentate O,N,O-type half-Salen ligands were prepared. All the complexes were characterized by 1H, 13C NMR and elemental analysis. These complexes were used as catalysts with 2-propanol for the ring-opening polymerization of l-lactide and rac-lactide. They were effective in lactide polymerization with good conversions. And polymerizations were living...
Amphiphilic diblock copolymer containing segments of polystyrene and monomethoxypoly(ethylene glycol) (PS-b-PEG) was synthesised by a novel method. Initially, the adduct (BZ-TEMPO) obtained by reacting benzoyl peroxide, styrene, and 2,2,6,6-tetramethyl-piperidinyl-1-oxy (TEMPO) was isolated, characterised and hydrolysed. Conditions for the synthesis and hydrolysis of BZ-TEMPO were investigated and...
Isobutenyl-telechelic polyisobutylenes (PIBs) were synthesized by reacting tert-chlorine-telechelic and living PIBs with isobutenyltrimethylsilane (IBTMS) in the presence of TiCl 4 in CH 2 Cl 2 /hexane (4060 v/v) solvent mixtures at -78°C. In order to obtain PIB oligomers, living polymerization of isobutylene was induced by the di-(2-hydroxy-2-propyl)-5-tert-butylbenzene (tBuDiCumOH)/BCl...
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