Abstract
Star polystyrenes composed of three branches (each branch was different in degree of polymerization (DP)) were synthesized, and the relationship between the elution peak count of gel-permeation chromatographs (GPC) and the DP of each branch was obtained for these star polystyrenes. Then 1: 1 graft copolymer (a backbone having a single branched chain) was synthesized by the coupling reaction of polystyryl anion with chloromethylated polystyrene in tetrahydrofuran (THF) at 20°C. The distribution of grafting sites on the backbone polymer of 1: 1 graft copolymer was derived from the calibration of star polystyrene. It was found that polystyryl anion reacted at the part near an end pendant group of a backbone molecule; the amount reacted increased with increasing DP of polystyryl anion and with decreasing DP of backbone polymer.
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Ishizu, K., Fukutomi, T. & Kakurai, T. Studies on the Formation of Graft Copolymer by Coupling Reaction. II. Determination of Grafting Site of 1: 1 Graft Copolymer by Using Star Polymers. Polym J 7, 570–576 (1975). https://doi.org/10.1295/polymj.7.570
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DOI: https://doi.org/10.1295/polymj.7.570