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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and Hydrolysis of #beta#-Cyanoethyl Ether of Poly(vinyl alcohol)
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Synthesis and Hydrolysis of #beta#-Cyanoethyl Ether of Poly(vinyl alcohol)

机译：聚乙烯醇的＃β＃-氰乙基醚的合成与水解

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Poly(vinyl alcohol)(PVA) was cyanoethylated by reaction with acrylonitrile in the presence of sodium hydroxide and quaternary ammonium halide. Quaternary ammonium halide, acting as a phase transfer catalyst, increases the degree of substitution (DS) of PVA. The DS also increased with increasing acrylonitrile concentration. Cyanoethylation of PVA up to 98% can be achieved under optimum conditions. The hydrolysis of #beta#-cyanoethyl ether of PVA(CN-PVA) was studied. The rate of hydrolysis was affected by teh sodium hydroxide concentration and the reaction temperature. The rheological properties of aqueous solution of hydrolysis product of CN-PVA were determined at different temperatures, and the flow activation energy was calculated.
机译：在氢氧化钠和卤化季铵存在下，通过与丙烯腈反应，将聚乙烯醇（PVA）氰基乙基化。用作相转移催化剂的卤化季铵盐增加了PVA的取代度（DS）。 DS也随着丙烯腈浓度的增加而增加。在最佳条件下，可以实现高达98％的PVA氰乙基化。研究了PVA（CN-PVA）的＃beta＃-氰基乙基醚的水解。水解速度受氢氧化钠浓度和反应温度的影响。测定了不同温度下CN-PVA水解产物水溶液的流变性质，并计算了流动活化能。

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