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首先对结晶增长速率同浓度、分子量和链柔性依赖性进行总结,然后基于微晶核和粒———高分子键组网络结构模型和高分子分子分凝统计结晶动力学,根据高分子链组是微晶粒同连接链段复合体的结构特征及它们间存在的四个相关性(并存性、简并性、顺反式构象共存性和物料守恒性)的事实,成功地把连接链段缩短增长动力方程同微晶粒体积增大增长动力方程有机结合在一起,从理论上创建出一种微晶粒数增长速率和微晶粒尺寸增长速率表达的一般化计算法,推导出结晶体系的微晶粒数增长速率和微晶粒尺寸增长速率同四种增长机制(近邻折叠,近邻伸直,近邻折叠同近邻伸直并联并存和近邻折叠同近邻伸直串联并存)、结晶温度和高分子起始结构(分子量)间定量表达式.当把分子量的指数同链的构象分数相连后,就又从理论上得到了分子量指数同温度和链柔性间的关系式,并讨论了它们同增长机制间的关系.最后以大量结晶动力学实验数据对上述所得到的关系式进行了验证,结果表明它们均能同实验结果很好符合.
First, the crystal growth rate with concentration, molecular weight and chain flexibility dependence were summarized, and then based on the microcrystalline nucleus and the particle --- polymer bond network structure model and polymer molecular coagulation statistical crystallization kinetics, according to the polymer chain group Is the fact that there are four interdependencies (coexistence, degeneracy, co-trans conformational coexistence and material conservation) between the micro-crystallites and the linker segment complexes, and the successful connection of the linker segments The shortened growth momentum equation is combined with the kinetic equation of increasing the volume of microcrystals to create a generalized calculation method of the growth rate of the number of microcrystals and the growth rate of the size of the microcrystals theoretically. The growth rate of microcrystal grains and the growth rate of microcrystal size are the same with four kinds of growth mechanisms (neighbors, neighbors, coexists of neighbors folded in parallel with neighboring neighbors and coexisted neighbors folded neighbors), the crystallization temperature and height When the molecular weight index is connected with the conformational score of the chain, the molecular weight index is also theoretically obtained as a function of temperature and chain flexibility Relationship, and we discussed the relationship between them and the growth mechanism. Finally, a large number of crystallization kinetics of experimental data on the relation obtained above was validated, the results show that they can result in good agreement with experiment.