| AS-PEG及AS-PVP体系的聚合物相对分子质量阈值及表面活性剂临界浓度 |
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| 引用本文： | 夏咏梅,方云,杨扬,吴云兰. AS-PEG及AS-PVP体系的聚合物相对分子质量阈值及表面活性剂临界浓度[J]. 精细化工, 2001, 18(10): 572-575 |
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| 作者姓名： | 夏咏梅 方云 杨扬 吴云兰 |
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| 作者单位： | 江南大学化工及材料工程学院 江苏无锡214036(夏咏梅，方云)，江苏石油化工学院分析测试中心 江苏常州213016(杨扬)，江南大学化工及材料工程学院 江苏无锡214036(吴云兰) |
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| 基金项目： | 高等学校骨干教师资助计划课题 [( 2 0 0 0 ) 6 5 ]~~ |
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| 摘 要： | 用表面张力法研究了十二烷基磺酸钠 (AS)与不同相对分子质量的聚乙二醇 (PEG)或聚乙烯吡咯烷酮 (PVP)的混合体系的行为。在满足实验用聚合物的相对分子质量超过其自身的聚合物相对分子质量阈值 [MP]的前提下 ,AS PEG或AS PVP混合体系的表面张力 浓度对数 (γ -lgc)曲线呈现拟双平台 (或双拐点 )特征。对AS PEG体系而言 ,PEG的 [MP]为 2 0 0 0～ 40 0 0。具有双拐点的γ lgc曲线对应于两个表面活性剂临界浓度值 ,即第一临界浓度值c1和第二临界浓度值c2 ,且满足c1
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| 关 键 词： | 聚合物相对分子质量阈值 表面活性剂临界浓度 十二烷基磺酸钠 水溶性非离子聚合物 聚乙二醇 聚乙烯吡咯烷酮 |
Threshold Molecular Weight of Polymer and Critical Concentration of Surfactant in AS-PEG or AS-PVP Systems |
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| XIA Yong mei ,FANG Yun ,YANG Yang ,WU Yun lan. Threshold Molecular Weight of Polymer and Critical Concentration of Surfactant in AS-PEG or AS-PVP Systems[J]. Fine Chemicals, 2001, 18(10): 572-575 |
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| Authors: | XIA Yong mei FANG Yun YANG Yang WU Yun lan |
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| Affiliation: | XIA Yong mei 1,FANG Yun 1,YANG Yang 2,WU Yun lan 1 |
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| Abstract: | The behaviors of mixed systems of sodium dodecanesulfonate (AS) with polyethyleneglycol (PEG) or with polyvinylpyrrolidone (PVP) both having different molecular weights were studied by surface tension.There occur pseudo double plateau regions or bis transition points on the γ lg c curves of AS PEG or AS PVP if the molecular weight of the tested polymer is beyond its own threshold molecular weight of polymer . of PEG in AS PEG systems is between 2000-4000.Two critical concentration values c 1 and c 2 could be found along with each γ lg c curve possessing bis transition points,which are in agreement with the relationship of c 1
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| Keywords: | threshold molecular weight of polymer critical concentration of surfactant sodium dodecanesulfonate water soluble nonionic polymer polyethyleneglycol polyvinylpyrrolidone |
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