CHARACTERIZATION OF THE RADIATION GRAFT COPOLYMER OF STYRENE ONTO MgO

Che Jitai; Yan Meilan; Sun Jiazhen

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CHARACTERIZATION OF THE RADIATION GRAFT COPOLYMER OF STYRENE ONTO MgO

更新时间：2023-04-23

- CHARACTERIZATION OF THE RADIATION GRAFT COPOLYMER OF STYRENE ONTO MgO
- Journal of Radiation Research and Radiation Processing Vol. 7, Issue 3, Pages: 26-29(1989)
- 作者机构：
  
  1.中国科学院长春应用化学研究所，长春
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Che Jitai, Yan Meilan, Sun Jiazhen. CHARACTERIZATION OF THE RADIATION GRAFT COPOLYMER OF STYRENE ONTO MgO. [J]. Journal of Radiation Research and Radiation Processing 7(3):26-29(1989)
DOI：

Che Jitai, Yan Meilan, Sun Jiazhen. CHARACTERIZATION OF THE RADIATION GRAFT COPOLYMER OF STYRENE ONTO MgO. [J]. Journal of Radiation Research and Radiation Processing 7(3):26-29(1989) DOI：

摘要

本文用傅里叶变换红外光谱、X线衍射、XPS和GPC等手段表征了氧化镁与苯乙烯的辐射接枝共聚物。结果表明，在接枝共聚物的红外谱图和X线衍射图上出现有氧化镁和聚苯乙烯的谱带。氧化镁与聚苯乙烯共混物XPS谱图中的C,1S,、O,1S,以及Mg,2S,能级的峰位分别为285.0、530.0和87.6 eV，而氧化镁与苯乙烯接枝聚合物的C,1S,、O,1S,和Mg,2S,峰位分别为284.0、531.7和88.4 eV。说明氧化镁与苯乙烯辐射接枝聚合时，氧化镁被辐射后镁原子引起照射缺陷而成为接枝活性中心，与苯乙烯碰撞时镁原子与电负性大的碳原子相配位产生自由基，然后按自由基机理进行接枝聚合反应。接枝物中的O/C比随接枝率的增加而下降。接枝共聚物的分子量要比均聚物分子量大，但分子量分布较宽。

Abstract

The radiation graft copolymer of styrene onto MgO has been characterized by FT-IR, X - ray diffaction, XPS and GPC. It is shown that the graft copolymer has some peaks of MgO and polystyrene in IR and X - ray diffraction spectra respectively. It was found that there were some at 285.0, 530.0 and 87.6 eV in the spectra of the blend, which blongs to C,1S, O,1S, and Mg,2S, respectively, while the peak position of C,1S, O,1S, and Mg,2S, of the MgO - g-styrene copolymer were 284.0, 531.7 and 88.4 eV respectively. This shows that the active centers caused by the defect of Mg atom after irradiation react with styrene to form monomer free radical, then grafting reaction occurs by the free radical mechanism. The ratio of oxygen to carbon (O/C) of graft products decreases with the increasing of the grafting yield. The molecular weight of graft copolymer is higher than that of homo-polymer, but the molecular weight distribution is broader in the graft copolymer.

关键词

辐射接枝氧化镁苯乙烯

Keywords

Radiation graftMgOSt

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