Effect of monomer concentration on characteristics of methacrylic acid-grafted polyethylene film prepared by photografting
Effect of monomer concentration on characteristics of methacrylic acid-grafted polyethylene film prepared by photografting
复制标题
单体浓度对光接枝法制备甲基丙烯酸接枝聚乙烯薄膜特性的影响
DOI：
10.1016/s0014-3057(01)00294-4
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发表时间：
2002
影响因子：
6
通讯作者：
T. Kondo
中科院分区：
文献类型：
--
作者：
Ginting Suka Irwan;S. Kuroda;H. Kubota;T. Kondo
研究了在60 °C水溶剂中，单体浓度对甲基丙烯酸（MAA）在线性低密度聚乙烯（PE）膜（厚度=30 μm）上光接枝的影响，以及MAA接枝链的位置。氧杂蒽酮用作光引发剂，其较早地涂覆在膜样品上。单体浓度越高，接枝率和接枝效率越高。所得MAA接枝膜进行pH响应特性和吸附铜离子的能力的测量，以了解引入的功能的特性。接枝样品表现出pH响应特性，在酸性和碱性介质中，它们分别收缩和膨胀。接枝膜的pH响应特性较高的系统中制备的样品具有较高的单体浓度。此外，接枝样品具有吸附铜离子的能力，当在较高单体浓度的体系中制备样品时，该能力降低。通过扫描电子显微镜和衰减全反射红外光谱测定了接枝链在膜基体中的位置，讨论了接枝聚乙烯膜的pH响应特性和吸附铜离子能力的不同程度。
The effect of monomer concentration on photografting of methacrylic acid (MAA) onto linear low-density polyethylene (PE) film (thickness=30 μm) was investigated at 60 °C in water solvent together with the location of MAA-grafted chains. Xanthone was used as a photoinitiator which was coated on the film sample earlier. The higher percentage of grafting and graft efficiency were afforded for the system with the higher monomer concentration. The resultant MAA-grafted films were subjected to measurements of pH-responsive character and ability to adsorb cupric ion in order to understand the characteristics of function introduced. The grafted samples exhibited the pH-responsive character, where they shrank and swelled in acidic and alkaline media, respectively. The pH-responsive character of the grafted films was higher for the samples prepared in the system with a higher monomer concentration. Moreover, the grafted samples exhibited the ability to adsorb cupric ion, and the ability was reduced when the sample was prepared in the system with a higher monomer concentration. The different extents of the pH-responsive character and ability to adsorb cupric ion of the resulting grafted PE films were discussed in terms of location of grafted chains in the film substrate, which was determined by a scanning electron microscope and an attenuated total reflection infrared spectroscopy.