| 聚乙烯辐照接枝体系改变pH对接枝率的影响 |
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| 引用本文： | 俎建华,邱士龙,叶寅,姚思德.聚乙烯辐照接枝体系改变pH对接枝率的影响[J].辐射研究与辐射工艺学报,2002,20(3):178-182. |
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| 作者姓名： | 俎建华 邱士龙 叶寅 姚思德 |
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| 作者单位： | 中国科学院上海原子核研究所,上海,201800 |
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| 摘 要： | 采用γ射线辐照引发接枝的方法，在高密度聚乙烯（HDPE）上接枝丙烯酸（AA）和对接枝苯乙烯磺酸钠（SSS），制备了一种含羧酸基团和磺酸基团的阳离子交换膜，详细研究了反应体系在不同pH值下的接枝率变化规律。实验表明，在共辐照接枝方法中，当AA与SSS一步法接枝HDPE或接枝上AA的HDPE膜再共辐照接枝SSS时，总接枝率（Gt）及对苯乙烯磺酸钠的接枝率（Gs）随体系的pH的降低而升高，在预辐照一步法接枝中，Gt与Gs随体系pH的降低先升高后又有所降低，综合分析认为，改变pH值使体系粘度发生变化，从而影响了单体向基体的扩散速率。
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| 关 键 词： | 聚乙烯 辐照接枝体系 接枝率 辐射接枝 pH效应 扩散速率 改性处理 |
| 修稿时间： | 2001年12月5日 |
THE EFFECT OF pH ON GRAFTING YIELD IN POLYETHYLENE RADIATION GRAFTING SYSTEM |
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| ZU Jianhua,QIU Shilong,YE Yin,YAO Side.THE EFFECT OF pH ON GRAFTING YIELD IN POLYETHYLENE RADIATION GRAFTING SYSTEM[J].Journal of Radiation Research and Radiation Processing,2002,20(3):178-182. |
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| Authors: | ZU Jianhua QIU Shilong YE Yin YAO Side |
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| Abstract: | Acrylic acid (AA) and sodium styrene sulfonate (SSS) were grafted onto high-density polyethylene film by preirradiation, and we prepared an ion exchange membrane including strong acid and weak acid groups. The effect of pH on grafting yield was studied. In simultaneous radiation method G t and G s decrease with pH either HDPE grafted AA and SSS or AA-g-HDPE membrane grafted SSS. In preirradiation method G t and G s respectively increase with pH, and the highest grafting yield was observed at pH=2.80 then G t and G s decrease with pH. Viscity of grafting system was changed due to adjusting of pH, so that diffuse rate of monomers into matrix was affected. |
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| Keywords: | Radiation grafting pH effect Diffusion rate |
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