多肽和聚酰胺之间的差异|比较类似术语之间的差异

这关键区别在多肽和聚酰胺之间多肽是包含大量重复单元的聚合物材料氨基酸，而聚酰胺是包含大量重复单元的聚合物材料酰胺小组。

Both polypeptides and polyamides are amine-containing polymer materials. Polypeptides are naturally occurring bio-polymers whereas polyamides are artificially synthesized synthetic polymers.

1。概述和关键差异
2。什么是多肽
3。什么是聚酰胺
4。并排比较 - 与表格形式的多酰胺相对于多酰胺
5。Summary

什么是多肽

多肽是氨基酸的链，是生物聚合物材料。可以在蛋白质; a protein contains one or more polypeptide chains. Polypeptides contain amino acids that are linked to each other via peptide bonds, which are a type of covalent chemical bonds. There are two terminals in a polypeptide chain: N-terminal and C-terminal. The N-terminal is the amino-terminal, which ends with a free amino group, while the C-terminal is the carboxyl-terminal, which ends with a free carboxyl group. We can determine the sequence of amino acids present in a peptide via the observation of codons in the mRNA that occurs in the production of the polypeptide or the protein via translating the template strand.

Figure 01: Glycosylation of a Polypeptide

蛋白质结构有四种类型，具体取决于蛋白质中多肽的数量和排列。

主要结构 - 蛋白质的主要结构包含一个单个多肽链，该链在同一链中的一些氨基酸之间二硫键，这使得折叠结构。
二级结构 - 蛋白质的二级结构具有两种主要形式：α-螺旋结构和β-片结构。
三级结构 - 这是一个高折叠的网络结构。这种结构非常重要，因为它决定了蛋白质的功能。
第四纪结构 - 这是两个或三个多肽链的高度复杂的结构，它们相互关联。

什么是聚酰胺？

聚酰胺是具有大量重复单位的聚合物材料。这些是高性能的热塑性弹性体，其特征在于其高服务温度，良好的热老化和溶剂耐药性。此外，这些聚合物具有较高的模量和撞击性能，低摩擦系数和耐磨性高。尼龙是最常见和广泛使用的聚酰胺类型。如今，尼龙聚合物是美国最重要，最广泛的聚合物之一。

Key Difference - Polypeptides vs Polyamides

图02：聚酰胺纤维

聚酰胺包含酰胺组,极地groups. These polar groups allow polyamides to build hydrogen bonds between chains, thereby, improving the interchain attraction. This property of the polymer material enhances the mechanical properties of polyamide. For example, nylon contains flexible aliphatic carbon groups in the chain that improve the processability of the material by reducing the melt viscosity. The strength and stiffness of this material reduced when increasing the number of carbon atoms between the amide linkages. Therefore, the length of the hydrocarbon backbone is a key property that determines the performance of polyamide material. Due to the polarity of the amide group, polar solvents, mainly water, can affect polyamides.

聚酰胺有两种类型：脂肪族和芳香族聚酰胺。尼龙可以是脂肪族或半芳族聚酰胺。聚酰胺的主要应用包括在冷却系统，开关，连接器，点火组件，传感器和电动机零件中的散热器标头箱中

多肽和聚酰胺有什么区别？

Both polypeptides and polyamides are amine-containing polymer materials. Polypeptides are naturally occurring bio-polymers whereas polyamides are artificially synthesized synthetic polymers. The key difference between polypeptides and polyamides is that polypeptides are polymer materials containing a large number of repeating units of amino acids, whereas polyamides are polymer materials containing a large number of repeating units of amide groups.

这following table summarizes the difference between polypeptides and polyamides.