分子极性

对比可知，上述规律均是由分子极性的增加造成的。

The results are caused by the increasing molecular polarity .

SCF法计算分子极性反向之探讨

A discussion on the inversion in calculated molecular polarity by SCF method

三是用接枝改性的方法调整氯化聚丙烯的分子极性。实验室的马向东硕士用CPP-GD和马来酸酐等作原料，在CPP分子上接枝上马来酸酐基团，合成了五种不同接枝率的接枝物。

MAH was grafted to CPP by master Ma Xiangdong in our lab and five different in grafting yield of MAH kinds of synthesises were made .

结果表明，水蒸汽对VOC吸附平衡的抑制作用，随着RH的增大、VOC浓度的降低而增大，且随着VOC分子极性的增强而有所增大；

Results shows that the depression effect of atmospheric humidity on the adsorption equilibrium of VOCs increased with increasing RH and decreasing concentration of VOCs and seemed to increase with increasing polarity of VOC molecules .

PPB-MAH的缔合力参数可以用来量化表示其分子极性，椭圆方程可以用作溶剂的可溶性的预测。

The association interaction parameter of PPB-MAH can be used to express the molecule polarity quantitatively , and the ellipse equation can be used to estimate the solvability of solvents .

矢量法判定分子极性在中学化学中的应用

Application of deciding molecular polar with vector method in Chemistry Teaching of middle school

但硅橡胶存在分子极性低，疏水性强，物理性能较差等缺陷，其改性研究受到广泛关注。

The modification of silicone rubber has been widespread concerned because silicone rubber has low polarity , high hydrophobicity , and poor physical properties .

通过实验，研究调节剂对改进混合溶剂热力学平衡特性的作用，阐明应该综合考虑氢键、疏溶作用、分子极性和色散力等分子间相互作用力、溶解度和沸点来选择调节剂。

From experiments , the effect of modifiers for the improvement of thermodynamic equilibrium properties of mixed solvents is explained . The selection of modifier should be considered comprehensively with hydrogen bond , solvophobic , mo - lecular polar , solubility , boiling point .

因OP分子的极性头基团位于空腔外，加合物带有亲水性的极性端，有利于加合物在水溶液中的分散，提高了βCD加合物的溶解度。

The inclusion complex carries a polar head group of OP and its solubility greatly increases in aqueous solution .

但HF中只有一根键，所以分子也是极性的而甲烷中有一个网状偶极。

We only have the one bond so the actual HF molecule is polar , it has a net dipole .

结果表明，A段分子的极性、B段分子的柔性和分子量对该分散剂的性能有很大影响。

It is suggested that the polarity of polar group of block A and the flexibility and molecular weight of block B segment affect the dispersibility of TiO_2 / toluene system greatly .

本文研究了AB嵌段型WH-1颜料分散剂的合成及其对钛白粉的分散能力。结果表明，A段分子的极性、B段分子的柔性和分子量对该分散剂的性能有很大影响。

This paper reports the study of synthesis of WH-1 AB blocked pigment dispersant and its dispersibility for TiO_2.It is suggested that the polarity of polar group of block A and the flexibility and molecular weight of block B segment affect the dispersibility of TiO_2 / toluene system greatly .

结果发现，当包覆剂大分子的极性单体单元含量≈7%及Tg≥38℃，可获得粒径≤0.9mm的产物达99.5%以上；

The results showed that the product with particle diameter ≤ 0.9 mm accounted for above 99.5 % when the content of the polar monomer unit in the macromolecules of encapsulant s was about 7 % by mass and T g of encapsulant was equal to or above 38 ℃ .

乙醇的极性最强，对丁腈橡胶的腐蚀最为强烈，提出了燃料分子的极性力是造成含氧燃料腐蚀柴油机燃油橡胶管的观点。

Ethanol which had the strongest polar force corroded nitrile rubber most .

是什么让一个分子呈极性或者非极性？

What makes something polar versus nonpolar ?

且取代基的吸电子能力愈强，分子的极性愈大。

The stronger the electron withdrawing ability of substituent R_1 and R_2 , the bigger the molecular polar is .

近年来，利用有机功能性小分子与极性聚合物杂化得到了高性能的阻尼材料，这被认为是一种制备高性能阻尼材料的新思路、新方法。

Recent years , high performance damping materials were made from functional organic small molecule / hindered phenol hybrids . It was regarded as creating a new concept and method to prepare high performance damping materials .

水分子是极性分子，水分子之间存在的电偶极相互作用，使它们以氢键的形式相互偶联在一起，形成水的团簇结构，且这种结构是一种动态结合。

Water molecule is polar molecule , and electric dipole interaction exiting among water molecules leads to water group configuration which is a dynamic combination by hydrogen chemical bond , Water molecule will bring tropism polarity in the microwave field .

结果表明，物理老化可以减少聚合物系统的自由体积，使发色团分子的极性方向不易发生改变，从而提高了极化聚合物的取向稳定性；

The experimental results show that the physical aging is an important means for improving the orientational stability of poled film because it can effectively decrease polymer 's free volume and restrict the oriented polar molecules to rotate out of alignment .

其中，PAC的微孔比表面积是影响其吸附SOC类小分子、弱极性有机污染物的主要因素，对吸附起决定性作用。

The micropore area of PAC was the critical factor to determine its adsorption capacity of the low molecular weight and low-pole SOC organic pollutants .

研究了臭氧处理对氢化苯乙烯-丁二烯-苯乙烯嵌段共聚物（SEBS）分子结构及其极性的影响，并对臭氧处理SEBS增韧PA6进行了研究。

The effects of ozone treatment on the molecular structure and polarity of SEBS , and toughening PA6 with ozonized SEBS were studied .

在LLDPE的大分子上没有极性基团，它与很多基材如金属、塑料、玻璃和低的粘结力很差。

There is no polar radical on the macromolecules of LLDPE . It has poor adhesion to many substrates such as metal , plastics , glass and paper .

经SephadexG-100、DEAE-SephadexA-25、HPLC和比旋光度法验证，AMP分子量及极性均一。

By means of Sephadex G-100 , DEAE-Sephadex A-25 , HPLC and specific optical rotation measurement , it was proved to be homogeneous on molecular weight and polar as well .

但与此同时，分子链间极性增强，作用力增大，致使CPVC的冲击强度低，加工成型困难，使其应用受到了极大限制。

The polarity between the molecular chain and the Molecular force is enhanced , cause the impact strength is poor , and difficulties in processing . Those factors limited the use of CPVC .

空间对称的极性键分布，还是会导致整个分子为非极性分子。

Symmetric disposition of polar bonds still results in a nonpolar molecule .

正负电荷中心不重合的分子称为极性分子。

A molecule where the centers do not coincide is called a polar molecule .

色散力则在极性分子及非极性分子间都存在。

London forces are a type of intermolecular force that occurs between all molecules whether polar or nonpolar .

在某一极性介质中，游离的分散剂分子通过非极性尾链间的吸附作用被拉向那些已经吸附在颜料表面的分子。

In certain polar media , free molecules are drawn to those already attached to the pigment surface through apolar-apolar interaction of the tails .

我们仔细地讨论了分子形状、极性强弱和烷基链结晶在超分子结构形成过程中起到的重要作用。

We carefully discussed the important role of molecular shape , polarity , and alkyl chain crystallization played in the formation of the supramolecular structure .

改变聚合条件，可控制烯烃共聚酯的分子量、极性单体插入率和熔融温度等性质。

The yield , molecular weight , polar comonomer content and melting temperature of the poly ( olefin-ester ) s can be controlled by the change of polymerization reaction condition .