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首页> 外文期刊>Journal of Applied Polymer Science >The effect of furan molecular units on the glass transition and thermal degradation temperatures of polyamides
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The effect of furan molecular units on the glass transition and thermal degradation temperatures of polyamides

机译：呋喃分子单位对聚酰胺玻璃化转变和热降解温度的影响

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Interfacial polymerization is used to prepare biobased furan polyamides from the carbohydrate-derived monomer, 2,5-furan dicarboxylic acid, aromatic diamines, and varying chain length aliphatic diamines. The molecular weights of the furan polyamides variations range 10,000-70,000 g/mol. These biobased polyamides have improved solubility relative to petroleum-derived polyamides affording enhanced processability options. The glass transition temperatures (T-g) of the biobased furan polyamides are higher than that of aliphatic analogs, but lower than phenyl-aromatic analogs. The T-g for these furan polyamides are as high as 280 degrees C. Also, the furan polyamide glass transition temperatures increase with decreasing aliphatic diamine chain length similar to results exemplified in petroleum-based nylons. Group contribution parameters are determined for furans to enable simple prediction of the glass transition temperature and decomposition temperature of furan polyamides. The molar glass transition function for the furan is calculated to be 27.6 +/- 1.5 Kkg/mol. Thermal analysis measurements of the biobased furan polyamides have maximum thermal degradation temperatures at 350 degrees C or higher, similar to that of aliphatic polyamides when scaled with the number average molecular weight. The molar decomposition temperature functions are determined to be 37 Kkg/mol for furans bonded to aliphatic units and 42 Kkg/mol for furans bonded to phenyl units. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45514.
机译：界面聚合用于制备来自碳水化合物衍生的单体，2,5-呋喃二羧酸，芳族二胺和不同链长脂族二胺的生物应用呋喃聚酰胺。呋喃聚酰胺变化的分子量范围为10,000-70,000g / mol。这些生物化聚酰胺相对于石油衍生的聚酰胺具有改善的溶解度，得到了增强的可加工性选择。生物呋喃聚酰胺的玻璃化转变温度（T-G）高于脂族类似物，但低于苯基 - 芳族类似物。对于这些呋喃聚酰胺的T-g高达280℃。此外，呋喃聚酰胺玻璃化转变温度随着脂族二胺链长度而增加，类似于基于石油基尼龙中示例的结果。确定组贡献参数，用于呋喃，以实现呋喃聚酰胺的玻璃化转变温度和分解温度的简单预测。呋喃的摩尔玻璃过渡功能计算为27.6 +/- 1.5 kkg / mol。 Biobased Furan聚酰胺的热分析测量值在350℃或更高的350℃或更高的最大热降解温度，与缩放数均分子量缩放时类似于脂族聚酰胺的温度。摩尔分解温度函数被确定为37kgg / mol，呋喃与脂族单元粘合，42kkg / mol用于染色苯基单元。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2017,134,45514。

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