共聚物
己二胺
产量(工程)
高分子化学
单体
化学
差示扫描量热法
己内酰胺
缩聚物
二胺
水解
有机化学
聚酰胺
材料科学
聚合物
物理
热力学
冶金
作者
Ethem Kaya,Eylem Tarkin‐Tas,Scott Osborn,Roger Ayotte,Steven C. Manning,Lon J. Mathias
摘要
ABSTRACT A 12‐membered cyclic diamide monomer for nylon 64 was successfully synthesized in fairly high yield (∼45%). The synthesis conditions were varied to see the effect of the diamine and succinyl chloride reactants on yield. Threefold excess of 1,6‐hexamethylenediamine (HDA) gave the highest yield, while further increasing the amount of HDA decreased the yield. Using N , N ‐diisopropylethylamine as acid scavenger resulted in the formation of two different cyclic amides, which were fully analyzed by 1 H and 13 C solution nuclear magnetic resonance spectrometry and mass spectrometry. Copolymerization of cyclic amides with ε‐caprolactam via an anionic route gave a block copolyamide with a two distinct endotherms in the differential scanning calorimetry analysis. However, copolymerization by the hydrolytic route gave only nylon 6 with terminal 64 units. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52 , 96–103
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