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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and characterization of polyamide resins from soy-based dimer acids and different amides
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Synthesis and characterization of polyamide resins from soy-based dimer acids and different amides

机译：基于大豆二聚酸和不同酰胺的聚酰胺树脂的合成与表征

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摘要

A series of soy-based polyamides with different dimer acids and diamines were synthesized using a condensation polymerization technique. The molecular weight of polyamides prepared from 1,4-phenylenediamine increases greatly with a reaction temperature above 260 degrees C. The physical properties of the polyamides, such as glass transition temperature (T-g), melting point (T-m), decomposition temperature (T-d), crystalline behavior, and mechanical strength strongly depend on their molecular weight and flexibility of diamines used. The aromatic-based polyamides have a higher T-g, T-m, T-d, and stronger mechanical strength than that of aliphatic-based polyamides. X-ray diffraction patterns of the samples indicate that all of the resins synthesized present a typical semicrystalline morphology. Polyamides made from hydrogenated dimer acid possess lower T-g and higher mechanical strength, compared with polyamides from unsaturated dimer acid with different dimer and trimer ratios. These results are analyzed and discussed in accordance with the influence of rigid aromatic segments and the microstructure of different dimer acids. (C) 1998 John Wiley & Sons, Inc. [References: 29]
机译：使用缩聚技术合成了一系列具有不同二聚酸和二胺的大豆基聚酰胺。当反应温度高于260摄氏度时，由1,4-苯二胺制得的聚酰胺的分子量会大大增加。聚酰胺的物理性能，例如玻璃化转变温度（Tg），熔点（Tm），分解温度（Td） ，结晶行为和机械强度在很大程度上取决于它们的分子量和所用二胺的柔韧性。芳族基聚酰胺比脂族基聚酰胺具有更高的T-g，T-m，T-d和更强的机械强度。样品的X射线衍射图表明，所有合成的树脂均表现出典型的半结晶形态。与由具有不同二聚物和三聚物比率的不饱和二聚物酸制成的聚酰胺相比，由氢化二聚物酸制成的聚酰胺具有较低的T-g和较高的机械强度。根据刚性芳族链段的影响和不同二聚酸的微观结构对这些结果进行了分析和讨论。 （C）1998 John Wiley＆Sons，Inc. [参考：29]

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