| 聚乙烯醇-碘复合物在水溶液中的形成 |
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| 引用本文： | 杨琥,程镕时. 聚乙烯醇-碘复合物在水溶液中的形成[J]. 高分子通报, 2008, 0(1): 7-15 |
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| 作者姓名： | 杨琥 程镕时 |
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| 作者单位： | 南京大学化学化工学院介观化学教育部重点实验室,高分子科学与工程系,南京,210093;南京大学化学化工学院介观化学教育部重点实验室,高分子科学与工程系,南京,210093 |
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| 基金项目： | 国家自然科学基金 , 教育部留学回国人员科研启动基金 |
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| 摘 要： | 聚乙烯醇(PVA)在碘-碘化钾混合水溶液中能形成蓝色复合物,该复合材料在人们日常生活中已广泛应用.本文综述了在稀溶液条件下聚乙烯醇-碘复合物的形成,并对其复合物形成的可能影响因素,如:PVA的分子量、链结构的规整度、1,2-羟基结构、支链以及浓度、添加其它物质和反应时间等,进行了系统论述.从聚集模型观点看,在复合物中,碘主要是以线性多聚碘负离子形式存在的,如:T3-和I5-等;而PVA链通过分子间氢键作用形成链间聚集将多聚碘负离子包裹在内而形成复合物.
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| 关 键 词： | 聚乙烯醇(PVA) 聚乙烯醇-碘复合物 聚集模型 |
Formation of Poly(vinyl alcohol)-iodine Complexes in Solution |
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| YANG Hu,CHENG Rong-shi. Formation of Poly(vinyl alcohol)-iodine Complexes in Solution[J]. Polymer Bulletin, 2008, 0(1): 7-15 |
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| Authors: | YANG Hu CHENG Rong-shi |
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| Abstract: | PVA-iodine complexes could be formed in kI-iodine aqueous solution, which materials have been already applied widely in daily life. In this paper, the formation of PVA-iodine complexes in dilute aqueous solution has been reviewed. The effects of the degree of polymerization, stereo-regularity, 1,2 glycol content, concentration of PVA, additional reagents and reaction time on the color development due to PVA-iodine complexes have been studied. From the viewpoint of aggregation mode, the structure of iodine in the complexes is linear polyiodine ions such as I-_3 and I-_5, whereas PVA chains are readily to aggregate by intermolecular hydrogen bonding, and each polyiodine is surrounded by some parallelly-oriented PVA chains to form complexes. |
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| Keywords: | Poly(vinyl alcohol) (PVA) PVA-iodine complexes Aggregation model |
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