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Effect of amide distribution in polyamide isomers on their melting points

机译:酰胺分布在聚酰胺异构体对熔点的影响

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摘要

A new insight has been obtained relating the different structures of linear aliphatic homopolyamides to their melting points. A new equation is derived for structures based on monomers with an even number of methylene units. In this equation, the amide distribution along the polymer chain is defined by a newly introduced parameter K which indicates the lowest number of methylene units between adjacent amide groups. For K >= 4 a generic empirical relation is defined, describing the observed melting points of these polyamides. The trend in H-bond densities in the melt obtained by modeling corresponds well with the trend in observed melting points. (C) 2017 Wiley Periodicals, Inc.
机译:已经获得了新的洞察力,将线性脂族均聚酰胺的不同结构与它们的熔点相关。 基于具有偶数亚甲基单元的单体的结构来衍生新的等式。 在该等方程中,沿着聚合物链的酰胺分布由新引入的参数k限定,该参数k表示相邻酰胺基团之间的最低数量的亚甲基单元。 对于k> = 4,定义了通用的经验关系,描述了这些聚酰胺的观察到的熔点。 通过建模获得的熔体中H键密度的趋势与观察到的熔点的趋势很好。 (c)2017 Wiley期刊,Inc。

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