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首页> 外文期刊>Journal of Applied Polymer Science >EFFECT OF ORGANIZED ANIONIC SURFACTANT SYSTEM ON KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY CE(IV) - CITRIC ACID AND OTHER ORGANIC SUBSTRATES
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EFFECT OF ORGANIZED ANIONIC SURFACTANT SYSTEM ON KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY CE(IV) - CITRIC ACID AND OTHER ORGANIC SUBSTRATES

机译：阴离子表面活性剂体系对CE（IV）-柠檬酸和其他有机基质引发的丙烯腈聚合反应动力学的影响

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The polymerization of acrylonitrile (AN) using the Ce(IV)-citric acid (CA) redox system as an initiator in aqueous nitric acid solution, in the presence of an anionic surfactant, sodium dodecyl sulfate (SDS), has been kinetically studied at a temperature range of 25-45 degrees C. The rate of polymerization (R(p)) and disappearance of Ce(IV) (-R(Ce)) increase with increasing concentration of SDS, above its critical micelle concentration (cmc), when the surfactant molecules are organized. R(p) was found to be proportional to [AN](1.5) and [CA](0.5). With other organic substrates, R(p) follows the increasing order of sorbitol greater than or equal to mannitol > glycerol > CA. But it was found to decrease considerably in the presence of cationic surfactant (CTAB), and nonionic surfactant (Triton-X-100) had no effect on the rate. -R(Ce) varies linearly with [Ce(IV)] and [CA]. Both R(p) and -R(Ce) increase with increasing temperature. The overall activation energy was found to be 18.31 and 13.72 kcal/mol in the absence and presence of 0.015M SDS, respectively. The chain length of the polyacrylonitrile has also increased with increasing SDS concentration. (C) 1996 John Wiley & Sons, Inc. [References: 42]
机译：在阴离子表面活性剂十二烷基硫酸钠（SDS）的存在下，已在动力学上研究了使用Ce（IV）-柠檬酸（CA）氧化还原体系作为引发剂在硝酸水溶液中进行的丙烯腈（AN）聚合。温度在25-45摄氏度之间。聚合速率（R（p））和Ce（IV）（-R（Ce））的消失会随着SDS浓度（高于其临界胶束浓度（cmc））的增加而增加，当表面活性剂分子被组织时。发现R（p）与[AN]（1.5）和[CA]（0.5）成比例。对于其他有机底物，R（p）遵循的山梨糖醇的增加顺序大于或等于甘露糖醇>甘油>CA。但是发现在阳离子表面活性剂（CTAB）的存在下它会大大降低，而非离子表面活性剂（Triton-X-100）对该速率没有影响。 -R（Ce）随[Ce（IV）]和[CA]线性变化。 R（p）和-R（Ce）均随温度升高而增加。发现在不存在和存在0.015M SDS的情况下，总活化能分别为18.31和13.72 kcal / mol。聚丙烯腈的链长也随着SDS浓度的增加而增加。 （C）1996 John Wiley＆Sons，Inc. [参考：42]

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