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本文得到了一组线性粘弹性函数(零剪切速率粘度η_0零拉伸速率粘度η_(ext),第一法向应力系数ψ_(10)~0和末端松驰时间τ_τ)同高分子熔体的起始分子量(M_ω)和其分布(M_u/M_n)间的新定量关系式.基于多重缠结模型和两类松驰机理,我们首次创立了两类缠结链组(末端和环绕)在高分子链远近程缠结空间的平均限制维数(?)的新概念,推导出了它(?)同起始分子量(单分散)、数均分子量(多分散)M_n和缠结点间平均分子量M_e等间的定量关系式,并提出了它的相应测定新方法.进而又从高分子熔体粘弹性分子理论和缠结链组的平均限制维数定量表征出发,用统计方法计算出了具有Lansing-Kraemer分布的高分子体系的线性粘弹函数(η_0,ψ_(10)~0,η_(ext)~0和τ_τ)同起始分子量和其分布间的定量关系式,并以大量实验加以证实.结果表明理论同实验较好符合.首次证实了(?)值因分子量大小和分布及高聚物2品种而稍有改变的事实.
In this paper, we obtain a set of linear viscoelasticity functions (viscosity at zero shear rate η_0, viscosity η ext at zero speed, first normal stress coefficient ψ_ (10) ~ 0 and terminal relaxation time τ_τ) (M_ω) and its distribution (M_u / M_n) based on the multiple entanglement model and two kinds of relaxation mechanism, we first created two types of tangled chain group (terminal and surrounding) It is deduced that the relationship between it (?) And initial molecular weight (monodisperse), number average molecular weight (polydispersity) M_n and mean interlacing point Molecular weight M_e and so on, and a new method of its corresponding determination is proposed.Furthermore, based on the molecular viscoelastic molecular theory of polymer and the quantitative characterization of the average limiting dimension of the entanglement chain group, a statistical method is used to calculate The linear viscoelastic functions (η_0, ψ_ (10) ~ 0, η_ (ext) ~ 0 and τ_τ) of the polymer system with Lansing-Kraemer distribution are the same as the initial molecular weights and their distributions. The results show that the theory is in good agreement with the experiment.It was first confirmed that the value of (?) Is dependent on the size and distribution of molecular weight And polymer 2 species and the fact that a slight change.