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研究了丙烯酰胺 (AM) /丙烯酸 (AA) /2 -丙烯酰胺 - 2 -甲基丙磺酸 (AMPS)共聚物 (P3A)在 90℃的水解反应 .结果表明 ,共聚物这时的水解反应不遵循单调动力学模式 ,而具有 2个反应阶段 ,它们分别属于分子间和分子内反应机制 .在第 1阶段 ,AM单元发生水解反应占主要地位 ,它受氢氧根离子浓度控制 ,反应速度强烈取决于 p H值 ,在第 2阶段 ,AMPS单元水解是主要反应 ,由于邻近 AA单元的分子内催化作用 ,反应速度和 p H关系不大 .讨论了共聚物的组成和链构象对水解反应的影响
The hydrolysis of acrylamide (AM) / acrylic acid (AA) / 2 - acrylamide - 2 - methylpropanesulfonic acid (AMPS) copolymer (P3A) was studied at 90 ℃ .It was found that the hydrolysis of the copolymer Which does not follow the monotonous kinetic model but has two reaction stages, which belong to the intermolecular and intramolecular reaction mechanism respectively. In the first stage, the AM unit is dominated by the hydrolysis reaction, which is controlled by the hydroxide ion concentration and the reaction rate Strongly depends on the p H value, in the second stage, the hydrolysis of AMPS unit is the main reaction, due to the intramolecular catalysis of adjacent AA units, the reaction rate has little relation to p H. The effects of the copolymer composition and chain conformation on the hydrolysis reaction Impact