反应详情

温度

-78 °C

Under a high vacuum, a tetarahydrofuran solution of sodium salt of a-methylstyrene tetramer was introduced into a polymerization vessel, and removed after sufficiently washing the vessel. Then, 198 ml of tetrahydrofuran and 18 ml (3.0 mmole) of a benzene solution of 1,1-diphenylhexyl lithium were introduced under the room temperature into the vessel, which in turn was cooled to -78° C. Then, 111 ml (74 mmole) of a tetrahydrofuran solution of n-lauryl methacrylate was introduced into the vessel to start polymerization. After a lapse of 2 hours, the mixture was further stirred for 30 minutes with introduction of 95 ml (66 mmole) of a tetrahydrofuran solution of 3-methacryloylethoxydimethylisopropylsilane, thereafter the reaction was stopped with addition of 2 ml of methanol, and 1 ml of 2N-hydrochloric acid was added into the reaction vessel to obtain a block polymer of poly n-lauryl methacrylate and polyhydroxyethyl methacrylate. After the reaction was finished, the solvent was removed so that the nonvolatile content was 50%. Hydrophobic and hydrophilic blocks forming this block polymer exhibited molecular weights of 2410 and 1210 respectively.

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4. additionwas added into the reaction vessel