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Two novel reversible addition–fragmentation chain transfer (RAFT) reagents bearing functional groups, S,S′-bis(9-anthrylmethyl) trithiocarbonate (BATTC) and S,S′-bis(1-naphthylmethyl) trithiocarbonate (BNTTC) were synthesized and used for the RAFT polymerizations of styrene (St). The polymerization results showed that the RAFT polymerizations could be well controlled using BNTTC or BATTC as the RAFT...
The possibilities to achieve a quantitative living-like anionic polymerization of styrene and dienes in the absence of solvent and at elevated temperature and using inexpensive initiating systems were explored to make the anionic polymerization competitive with industrial radical processes and allow the industrial production of anionic polystyrene (PS). It implied at first to control the reactivity...
Living cationic polymerization of styrene was achieved with a series of initiating systems consisting of a HX-styrenic monomer adduct (X = Br, Cl) and ferric chloride (FeCl 3 ) in conjunction with added salts such as tetrabutylammonium halides (nBu 4 N + Y − ; Y − = Br − , Cl − , I − ) or tetraalkylphosphonium bromides [nR′ 4 ...
Highly efficient carbocationic polymerization of styrene was achieved under environmentally advantageous conditions in benzotrifluoride, BTF (α,α,α-trifluorotoluene, TFT), an environmentally benign solvent at room temperature, that is without any energy consumption for cooling or heating, with even better yields than that in the usually applied volatile and harmful, widely used chlorinated solvent,...
Cationic polymerizations of p-methylstyrene (pMS) with H 2 O/AlCl 3 /triphenylamine (TPA) or triethylamine (TEA) initiating system were carried out in mixed solvents of n-hexane and dichloromethane at −80 ∼ −50 °C. The effects of TPA or TEA concentration, solvent polarity, polymerization temperature and time on monomer conversion, number-average molecular weight (M n ), molecular...
On the example of oxidative polymerization of styrene, explored was the feasibility of regulating the length of polymer chain upon variation in the amount of oxygen dissolved in the liquid phase. Due to the use of rapidly decomposing 2,2′-azo-bis-(isobutyronitrile) (AIBN) as an initiator, the polymerization reaction (at 95 °С) proceeded in two stages. At the first one, a source of radicals was AIBN;...
The stereoselective polymerization of β-myrcene and β-ocimene and their binary copolymerization with styrene promoted by titanium complexes dichloro{1,4-dithiabutanediyl-2,2′-bis(4,6-di-tert-butyl-phenyl)}titanium (1), dichloro{1,4-dithiabutanediyl-2,2′-bis[4,6-bis(2-phenyl-2-propyl)phenoxy]}titanium (2) and Ti(η5-C5H5)-(η2-MBMP)Cl (3) (MBMP = 2,2'methylenebis(6-tert-butyl-4-methylphenoxo)) activated...
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