Polymerizations of methylacrylate, styrene and methyl methacrylate were carried out in the presence dithiobenzoic acid (DTBA). The results exhibit controlled polymerization characters: well-controlled molecular weight, narrow molecular weight distribution (minimal value: 1.08), molecular weight linearly increasing with conversion and first-order kinetics of polymerization. The polymers were characterized by 1H NMR and GPC. The effect of temperature and molar ratio DTBA/AIBN on polymerization was investigated. A mechanism is proposed to explain the controlled polymerization characters.
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Bai et al. (2000) studied this question.
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