Preparation method of styrene/N-phenylmaleimide binary copolymer
A maleimide binary copolymer and maleimide technology are applied in the field of preparing styrene/N-phenylmaleimide binary copolymer by coordination polymerization, which can solve the problem of affecting the copolymer. Quality, difficult to remove and other problems, to achieve the effect of less impurity content, easy temperature control, and low impurity content
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[0020] Example 1
[0021] A method for preparing styrene / N-phenylmaleimide binary copolymer, according to the following steps:
[0022] Add 0.003mol La(P 507 ) 3 , 0.005mol triethylaluminum, 0.6mol N-phenylmaleimide, 1.2mol styrene and 1L toluene, react at 50℃ for 5 hours, stop the reaction with 1ml ethanol solution containing 5% hydrochloric acid, The product is poured into ethanol to precipitate the copolymer, and then filtered and dried to obtain the finished product.
[0023] The yield of the styrene / N-phenylmaleimide binary copolymer obtained in this example is 45%, and the number average molecular weight is 3.5×10 4 , The molecular weight distribution is 7.2.
Example Embodiment
[0024] Example 2
[0025] A method for preparing styrene / N-phenylmaleimide binary copolymer, according to the following steps:
[0026] Add 0.005mol La(P 204 ) 3 , 0.03mol trimethylaluminum, 0.7mol N-phenylmaleimide, 1.3mol styrene and 1L benzene, react at 45℃ for 6 hours, stop the reaction with 1ml ethanol solution containing 5% hydrochloric acid, The product is poured into ethanol to precipitate the copolymer, and then filtered and dried to obtain the finished product.
[0027] The yield of the styrene / N-phenylmaleimide binary copolymer obtained in this example is 85%, and the number average molecular weight is 25×10 4 , The molecular weight distribution is 4.8.
Example Embodiment
[0028] Example 3
[0029] A method for preparing styrene / N-phenylmaleimide binary copolymer, according to the following steps:
[0030] Add 0.01mol Nd(P 507 ) 3 , 0.02mol trimethylaluminum, 0.03mol triethylaluminum, 0.6mol N-phenylmaleimide, 1.2mol styrene and 1L toluene, react at 50℃ for 5 hours, use 1ml containing 5% hydrochloric acid The ethanol solution terminates the reaction, the reactants are poured into ethanol to precipitate the copolymer, and then filtered and dried to obtain the finished product.
[0031] The yield of the styrene / N-phenylmaleimide binary copolymer obtained in this example was 96%, and the number average molecular weight was 41×10 4 , The molecular weight distribution is 2.1.
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