Deprotection-free preparation of propargyl ether-containing phosphinated benzoxazine and the structure-property relationship of the resulting thermosets
作者:Hou Chien Chang、Ching Hsuan Lin、Hung Tse Lin、Shenghong A. Dai
DOI:10.1002/pola.25857
日期:2012.3.1
ether‐containing phosphinated benzoxazine (2) from the nucleophilic substitution of a phenolic OH‐containing phosphinated benzoxazine (1) and propargyl bromide in the catalysis of potassium carbonate. The structure of (2) was characterized and confirmed by a high‐resolution mass spectrum, 1H, 13C, 1H‐1H, 1H‐13C nuclear magnetic resonance (NMR) spectra, and X‐ray single crystal diffractogram. infrared (IR) and
通常,在制备含炔丙基醚的苯并恶嗪时需要氨基的保护和脱保护步骤。在本研究中,我们报道了在碳酸钾催化中,通过苯酚OH的次膦酸苯并恶嗪(1)和炔丙基溴的亲核取代,轻松,无保护地制备含炔丙基醚的次膦酸苯并恶嗪(2)。(2)的结构已通过高分辨率质谱1 H,13 C,1 H- 1 H,1 H- 13进行了表征和确认C核磁共振(NMR)光谱和X射线单晶衍射图。红外(IR)和差示扫描量热法用于监测苯并恶嗪的开环和炔丙基醚的交联。讨论了所得均聚物和共聚物的微观结构和结构-性能关系。通过动态力学分析,(2)的均聚物的T g为208℃,热膨胀系数为43ppm /℃,并且T d 5%(N 2)分别为393℃,高于(1)的均聚物的那些。在共聚体系中观察到相似的趋势。结果表明,炔丙基醚基团提供的交联的有益效果高于酚式OH基团提供的交联的有益效果。©2011 Wiley Periodicals,Inc. J Polym