Microstructure and Phase Behavior of Cationic Gemini/Anionic Polyelectrolyte/Water Ternary System

The microstructure of cationic gemini surfactant 1,6-bis(dodecyldimethylammonium) hexane dibromide [C12H25(CH3)2N-(CH2)6-N(CH3)2C12H25×2Br] (12-6-12×2Br-) and oppositely charged polyelectrolyte poly(acrylic acid, sodium salt) (NaPA) in aqueous solution has been studied by using fluorescence, conductivity measurement, freeze-etching and TEM. The data obtained from fluorescence and conductivity measurement show that micelle-like or complex can form between the gemini surfactant (12-6-12×2Br-) and polyelectrolyte NaPA due to the static electric interaction and hydrophobic forces. Through freeze-etching and TEM, the microstructure of the mixture solution has been studied, which is consistent with the result from micropolarity. Comparing the fluorescence spectrum of system of dodecyltrimethylammonium bromide (DTAB) and NaPA with that of system of gemini surfactant (12-6-12×2Br-) and NaPA, it can be found that the interaction between gemini surfactant (12-6-12×2Br-) and NaPA is stronger than that between DTAB and NaPA. And the phase behavior of (12-6-12×2Br-) and NaPA in aqueous solution has also been detected. It can be shown that the precipitate will transform into gel in higher NaPA concentration.     

某些有机化合物Yong的线性规律初探

分析和推导证明某些直链同系化合物理Ｙｏｎｇ和化学Ｙｏｎｇ在一定范围内存在线性关系，即Ｙｏｎｇ的大小与碳原子数成正比。     

1,3,3,3—四氯丙基苯的合成研究

本文以苯乙烯起始原料，与四氯化碳在催化作用下加成反应生成１，３，３，３－四氯丙基苯，得到适宜的工艺条件。     

共聚物系统的分子热力学模型

在非均核硬球链流体的基础上,通过引入方阱势能的贡献,导出了实际共聚物系统的分子热力学模型,并建立了相应的状态方程.建立的方程同计算机模拟结果比较,可发现方程能预测共聚物在不同条件下的压缩因子.     

卤代甲烷T_b、T_c值的预测

从卤代甲烷平均化键长的角度出发，提出了预测卤代甲烷沸点Ｔｂ和临界温度Ｔｃ的计算公式：Ｔｂ（Ｔｃ）＝ａλ２＋ｂλ＋ｃ，结果表明，计算值与实验值相当吻合。     

共聚高分子体系的分子热力学模型

以共聚硬球链流体的分子热力学模型为基础，通过引入链节间方阱位能相互作用的贡献。建立了实际共聚高分子系统的分子热力学模型，对纯共聚高分子ＰＶＴ的关系结果，平均相对误差为０．２２％－０．８０％。     

用拓扑学方法研究烷烃的化学

用拓外学方法建立分子结构与性能的关系一直是化学工作者在基础理论研究中的重要课题之一.1947年,Wiener最先提出了分子的两个拓扑指数,并用它对分子的沸点,汽化热进行了研究.以后,又有不同的研究者探讨了Wiener指数与烷烃分子的摩尔折射率,摩尔体积,标准熵,密度等关系.1975年Randic提出了一个新的拓扑指数即分支指数,简称R指数.梅平等曾关联了烷烃的标准生成焓,标准燃烧焓,标准熵等物质的13种现代性质与R指数的关系.在Randic方法的基础上,Kier和Hall又提出了分子连接性指数的概念及其计算方法.