中华医学超声杂志

应用化学 ›› 1997, Vol. 0 ›› Issue (1): 95-97.

• 研究论文 • 上一篇    下一篇

氧化镁表面辐射接枝聚合反应机理研究

蒋波1, 黄光琳2   

  1. 1. 四川联合大学原子核科学技术研究所, 成都 610064;
    2. 四川联合大学化学系 成都
  • 收稿日期:1996-05-21 修回日期:1996-08-26 出版日期:1997-02-10 发布日期:1997-02-10

Reaction Mechanism of Radiation Induced Graft Polymerization on MgO Surface

Jiang Bo1, Huang Guanglin2   

  1. 1. Institute of Nuclear Science and Technology, Sichuan Union University, Chengdu 610064;
    2. Department of Chemistry, Sichuan Union University, Chengdu 610064
  • Received:1996-05-21 Revised:1996-08-26 Published:1997-02-10 Online:1997-02-10

PDF

441

被引次数

7 | 1

摘要： 辐射诱发有机单体在固体表面聚合反应的研究是联系无机与有机界面的新领域. 辐射接枝聚合反应机理,很多作者的观点都是从无机固体本身的晶体性质和辐射损伤来解释. Eifler认为接枝有机单体是在固体解理性表面进行[1]. Yanova 认为高能射线辐照后产生固体损伤,同时有较长寿命的电荷生成,从而产生自由基[2]. 黄光琳等认为多晶固体表面预辐射接枝聚合反应是电子色心Fs+和空穴色心引发的结果[3]. 多数研究者认为固体表面接枝反应是自由基引发的[4,5]. 本文用共辐照方法,研究了甲基丙烯酸甲酯在固体氧化镁表面辐射接枝反应机理。

关键词: 氧化镁, 反应机理, 辐射接枝, 甲基丙烯酸甲酯

Abstract: The reaction mechanism of radiation induced graft polymerization on MgO surface by mutual irradiation has been studied. It is proved by IRspectroscopy that PMMA has been grafted onto MgO surface. By studying grafting temperature, inhibitor, molecular weight and molecular weight distribution, we discover that both free radical and anion induced graft polymerizations take place under the action of high energy radiation. Comparing IR spectra of radiation-polymerized PMMA and graft link on MgO surface, we suggest that O- species trapped in oxide ion lattice on the solid surface is the active site initiating graft polymerization by high energy radiation.

Key words: MgO, reaction mechanism, radiation induced grafting, MMA

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