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Control of Structure of Photo-Grafted Polymers and Its Application

光接枝聚合物结构控制及其应用

基本信息

批准号：
01550707
负责人：
KUBOTA Hitoshi
金额：
$ 1.09万
依托单位：
Gunma University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550707/
关键词：
Photografting Low-density polyethylene film Cellulose Surface structure of grafted film Stability of grafted film Location of grafted chains Metallic ion-absorbing character Catalytic activity 4ービニルピリジングラフトポリエチレン Nービニルイミダゾ-ルグラフトポリエチレン

项目摘要

In this study, photografting as a mean for functionalization of polymeric materials was applied to polyolefin and cellulose in order to design generation of a wide variety of functions by control of the location of grafted chains introduced into the polymeric substrates. In the first term, effect of grafting conditions on the location of methacrylic acid-grafted chains was examined using polyethylene (PE) film and then relationship between the location of grafted chains and the function of grafted polymers was investigated in the second term, and the results obtained are as follows :1. Control of the location of methacrylic acid-grafted chains in PE substrate was found to be possible by proper choice of polymerization systems (vapor- and liquid-phase), monomer concentration and polymerization temperature and addition of hydroquinone to the system.2. Catalytic activity of 4-vinylpyridine-grafted PE film, which was prepared with liquid-phase system, toward hydrolysis of p-nitrophenylacetate was higher than that prepared with vapor-phase system. The former sample was characterized by the distribution of grafted chains locarized at film surface compared with the latter sample. It was confirmed thus that the characteristic of the location of grafted chains is reflected on the function of grafted polymers.3. The results obtained for PE film were applied to cellulose. Glycidyl methacrylate-grafted celluloses prepared by liquid- and vapor-phase systems were reacted with diamines to yield celluloses with amino group. The resultant cellulose derivatives were subjected to the absorption character of cupric ion. There was little difference in the character between the both samples. Accordingly, further study will be necessary for control of the location of grafted chains in cellulose substrate.

在这项研究中，光接枝作为聚合物材料功能化的一种手段被应用于聚烯烃和纤维素，以便通过控制引入聚合物基材中的接枝链的位置来设计产生多种功能。第一项利用聚乙烯(PE)薄膜考察了接枝条件对甲基丙烯酸接枝链位置的影响，第二项研究了接枝链位置与接枝聚合物功能之间的关系，得到的结果如下：1．研究发现，通过适当选择聚合体系（气相和液相）、单体浓度和聚合温度以及向体系中添加对苯二酚，可以控制甲基丙烯酸接枝链在PE基材中的位置。2．液相体系制备的4-乙烯基吡啶接枝PE薄膜对对硝基苯乙酸酯水解的催化活性高于气相体系制备的。与后一个样品相比，前一个样品的特征在于位于薄膜表面的接枝链的分布。由此证实，接枝链的位置特性反映了接枝聚合物的功能。 3．将 PE 薄膜获得的结果应用于纤维素。将液相和气相体系制备的甲基丙烯酸缩水甘油酯接枝纤维素与二胺反应生成带有氨基的纤维素。所得纤维素衍生物具有铜离子的吸收特性。两个样品之间的特性几乎没有差异。因此，需要进一步研究控制纤维素基质中接枝链的位置。