摘要
根据高分子的特点,我们从Boltzmann熵定理出发,来理解Flory-Huggins晶格模型理论中推导混合熵(ΔSM)的思路。教学过程中突出高分子溶液中由于高分子相对分子质量大(x个链段),造成高分子的ΔSM比小分子大得多的结果;Flory-Huggins理论与实际情况的偏差;让学生学会用Flory-Hug-gins参数1χ值判断高分子溶液中溶剂的优劣性。
According to particularity of polymer, the way to apprehend the derivation of the composite entropy （△SM）, in the Flory-Huggins crystal lattice model, is discussed from the Boltzmann theorem. In teaching practice of Flory-Huggins theory, much attention should be paid to that high polymer relative molecular mass （x chain segments）. It will bring more △SM of polymer than that of small molecules in polymer solutions, and errors exist between the Flory-Huggins model and the real polymer solutions. The teaching aim is to guide students to command the estimation of solvent in polymer solutions using Flory-Huggins parameter X1. The teaching efforts emphasize to pilot students in understanding the Flory- Huggins lattice theory and its applications.
出处
《化工高等教育》
2009年第4期101-103,共3页
Higher Education in Chemical Engineering
