极性基团是指正负电荷中心不重合的基团,基团的极性可以用偶极矩来表征。 距离为l,电量为±q的两个点电荷构成一个电偶极子,用电偶极矩(简称偶极矩)μ=ql来表征,极性基团偶极矩μ>0.5。
...不溶物的单分子层) 1. Spread of monolayers(单分子层的展开) (1)Amphipathic molecule (双亲分子) Polar group(极性基团): -OH,-COOH,-SO 3 - ,-NO 3 + Hydrophilic, water soluble.
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... 1 极性基团 ploargroup 2 非极性基团 non-polargroup 3 亲和性 endophilicity;affinity ...
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Through analyzing their polarization ratios,such influences are distinct on different direction due to orientation of polar group.
同时通过对单、双链结构拉曼光谱中极化率的分析,发现由于极性基团的趋向不同,极性基团的影响也得到充分体现。
参考来源 - 一维二氧化硅纳米材料的光谱研究·2,447,543篇论文数据,部分数据来源于NoteExpress
复配溶剂满足沸点、黏度和极性基团三大原则;
The compound solvent met the three demands of boiling point, viscosity and polarity group.
近年来,国内外对降凝剂的配方研究趋向是增加极性基团或表面活性基团。
In recent years, the trend in studying the depressant formulas home and abroad is to increase their polar group or surfactant group.
在PP大分子链上接枝含极性基团的乙烯基单体,可显著提高PP的阻燃性能;
The introduction of the vinyl monomer containing polar group into PP macromolecular chain could improve the flame retardance of PP obviously.
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