Highly coheterotactic poly(methyl methacrylate-alt-styrene)s have been synthesized by using boron trichloride excess to methyl methacrylate at low temperature below −60 °C. The highest value of their coheterotacticities in triad sequence was about 90 mol%, which is the highest in heterotacticity among the polymers ever reported.
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Gotoh et al. (1990) studied this question.
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