| 木素磺酸盐接枝共聚的研究——Ⅰ.接枝方法和接枝共聚物的物化特性 |
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| 引用本文： | 薛菁雯,邰瓞生.木素磺酸盐接枝共聚的研究——Ⅰ.接枝方法和接枝共聚物的物化特性[J].纤维素科学与技术,1993(4). |
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| 作者姓名： | 薛菁雯 邰瓞生 |
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| 作者单位： | 南京林业大学林化系，南京林业大学林化系 南京 210037，南京 210037 |
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| 基金项目： | 国家自然科学基金，中科院广州化学研究所纤维素化学开放研究实验室资助项目 |
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| 摘 要： | 本文研究了由H_2O_2—Fe(Ⅱ)引发木素磺酸盐和丙烯酸单体的接枝共聚反应,比较了不同的接枝方法(一步法和连续法)对接枝共聚物粘度和分散性能的影响以及分子量分布的变化。研究结果表明,接枝共聚反应能大大提高木素磺酸盐的分散能力。连续法接枝共聚物的物化性能优于一步法,具有高分散性和低溶液粘度的特点。接枝共聚物的羧基含量随丙烯酸单体的用量增加而增加,而酚羟基含量较接枝前有所降低。
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| 关 键 词： | 木素磺酸盐 接枝共聚反应 连续法 物理化学性质 |
STUDIES ON GRAFT COPOLYMERIZATION OF LIGNOSULFONATE Ⅰ. GRAFT PROCESS AND PHYSICHEMICAL PROPERTIES OF GRAFT COPOLYMERS |
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| Xue Jingwen,Tai Diesheng Nanjing Forestry,University,Nanjing,China.STUDIES ON GRAFT COPOLYMERIZATION OF LIGNOSULFONATE Ⅰ. GRAFT PROCESS AND PHYSICHEMICAL PROPERTIES OF GRAFT COPOLYMERS[J].Journal of Cellulose Science and Technology,1993(4). |
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| Authors: | Xue Jingwen Tai Diesheng Nanjing Forestry University Nanjing China |
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| Affiliation: | Xue Jingwen,Tai Diesheng Nanjing Forestry,University,Nanjing,210037,China |
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| Abstract: | Graft copolymerization of wood and grass lignosulfonates with acrylic acid was studied in this paper. The copolymerization was redox initiated by peroxide—ferrous ion. The viscosity, dispersing property and molecular weight distribution of graft copolymers of the continuous process were compared with those of the one-step process. Results show that the physichemical properties of continuous copolymers are superior to those of one—step copolymers, with high dispersing properties and low solution viscosity. The phenolic contents of graft copolymers are lower than those of ungrafted lignosulfonate, while the carboxylic contents increase with the increasing of monomer charges. |
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| Keywords: | lignosufonate graft copolymerization continuous process physichemical property |
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