Wang Jing, Liu Qinghua, Yu Jiangnan, Xu Riwei, Wang Chengzhong, Xiong Jinping
Basic Education School, Beijing Information Technology College, Beijing 100070, China.
Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China.
Materials (Basel). 2022 Nov 24;15(23):8364. doi: 10.3390/ma15238364.
This paper presents an investigation of the modification of natural oxazines to traditional bisphenol A benzoxazines. Eugenol was reacted with furfurylamine to synthesize a new type of benzoxazine (eugenol-furfurylamine benzoxazine), with a yield of 77.65%; and another new type of benzoxazine (bisphenol A-furfurylamine benzoxazine) was generated from bisphenol A and furfurylamine, with the highest yield of 93.78%. In order to analyze and study the target molecules, IR (infrared radiation) spectroscopy, GPC (gel-permeation chromatograph), mass spectrometry, 1H-NMR (nuclear magnetic resonance), DSC (differential scanning calorimetry), and DMA (dynamic mechanical analysis) tests were conducted. Eugenol-furfurylamine benzoxazine and conventional bisphenol A-aniline benzoxazine (BZ) composite was also analyzed and cured at different mass ratios of 2:98, 5:95, 10:90, 20:80, and 40:60. When the content of eugenol furfurylamine in the blend reached 5%, the strength of the composite was greatly enhanced, while the strength decreased with the increase in eugenol furfurylamine oxazine content. Moreover, octamaleimide phenyl POSS (OMPS, polyhedral oligomeric silsesquioxane) and bisphenol A furamine benzoxazine were mixed at different molar ratios of 1:16, 1:8, 1:4, 1:2, and 1:1. The curing temperature sharply decreased with the increase in OMPS content. When the molar ratio reached 1:1, the curing temperature decreased from 248 to 175℃. A further advantage of using eugenol and furfurylamine is that they are renewable resources, which is important in terms of utilizing resources effectively and developing environmentally friendly products.
本文介绍了天然恶唑啉对传统双酚A苯并恶唑啉的改性研究。丁香酚与糠胺反应合成了一种新型苯并恶唑啉（丁香酚-糠胺苯并恶唑啉），产率为77.65%；另一种新型苯并恶唑啉（双酚A-糠胺苯并恶唑啉）由双酚A和糠胺生成，最高产率为93.78%。为了分析和研究目标分子，进行了红外光谱（IR）、凝胶渗透色谱（GPC）、质谱、核磁共振氢谱（1H-NMR）、差示扫描量热法（DSC）和动态力学分析（DMA）测试。丁香酚-糠胺苯并恶唑啉与传统双酚A-苯胺苯并恶唑啉（BZ）复合材料也在2:98、5:95、10:90、20:80和40:60的不同质量比下进行了分析和固化。当共混物中丁香酚糠胺含量达到5%时，复合材料的强度大大提高，而强度随着丁香酚糠胺恶唑啉含量的增加而降低。此外，八马来酰亚胺基苯基倍半硅氧烷（OMPS，多面体低聚倍半硅氧烷）和双酚A糠胺苯并恶唑啉以1:16、1:8、1:4、1:2和1:1的不同摩尔比混合。固化温度随着OMPS含量的增加而急剧降低。当摩尔比达到1:1时，固化温度从248℃降至175℃。使用丁香酚和糠胺的另一个优点是它们是可再生资源，这在有效利用资源和开发环保产品方面很重要。
