聚酰胺
结晶度
热稳定性
癸二酸
高分子化学
单体
材料科学
缩聚物
结晶
傅里叶变换红外光谱
熔点
玻璃化转变
极限抗拉强度
化学工程
聚合物
化学
有机化学
复合材料
工程类
作者
Syang‐Peng Rwei,Palraj Ranganathan,Whe‐Yi Chiang,Yi‐Huan Lee
出处
期刊:Polymers
[MDPI AG]
日期:2018-07-19
卷期号:10 (7): 793-793
被引量:23
标识
DOI:10.3390/polym10070793
摘要
This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/aromatic units weight content using a melt poly-condensation process. The bio-based aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based monomers. For the first time, the pertinent BABT/SA aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively.
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