环型聚苯乙烯的凝胶渗透行为和环型聚合物中线型成份相对含量的计算

根据理论推导,通过凝胶渗透行为和粘度研究,探讨了大环产物中线型成分与有关参数之间的定量处理方法,导出并验证了环型大分子与线型大分子GPC差异的定量关系式为g_c=exp-2.303b⊿V_c];(M_w)_GPC)与(M_w)_LS的关系为(M_w)_GPC/(M_w)_LS=g_c^1/(a+1),并提出了线型大分子相对含量为=(g_c^'-g_c)/(1-g_c^1/(a+1))(ag_c^'+g_c^a/(a+1))]。

Gel Permeation Behavior of Ring Shaped PS and Calculation of the Relative Content of the Linear Polymer in Ring Shaped Fractions

In dilute solutions there are quantitative relationships between the dynamic parameters of the ring shaped and linear polymer coils with the same structural unit and equal molecular weight. In this paper we have developed methods to deal quantitatively with problems concerning the calculation of the relative content of the linear polymer in the ring shaped fractions and the relationship between the elution volume and the parameter gc. The correlative equations gc =exp(-2.303 b△V_e) and (M_w)GPC /(M_w)_LS= g_c^I/(α+1) have been derived and verified by the gel permeation behavior and viscosity study. Finally, the relative content of the trace linear polymer in the ring shaped fractions has been given as W_L=(g_c^'-g_c)/(1-g_c^1/(a+1))(ag_c^'+g_c^a/(a+1))].