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化工学报  2015 

交联结构对苯类吸收树脂性能的影响

DOI: 10.11949/j.issn.0438-1157.20141053, PP. 814-819

Keywords: 吸收树脂,交联结构,吸收,扩散,动力学

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Abstract:

采用悬浮聚合法制备了球形苯类吸收树脂,研究了交联剂用量与树脂的吸收倍率、交联密度和凝胶分数之间的关系,探讨了交联结构对树脂吸收和释放动力学的影响,并采用扫描电镜考察了树脂的微观形貌。结果表明:随着交联剂用量的增加,吸收树脂的凝胶分数和交联密度不断增大,吸收倍率出现峰值;随着交联密度的提高,吸收树脂对甲苯的吸收速率和释放速率均减慢,吸收动力学常数与释放扩散系数都不断降低;树脂对甲苯的吸收动力学过程符合准一级动力学方程;得出了形式简洁的吸收树脂释放动力学方程,能够很好地描述吸收树脂释放甲苯的动力学行为;吸收树脂的交联结构稳定,再生重复使用10次以后树脂微球的大小、形貌和吸收倍率均无明显变化。

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