Synthesis, characterization, and thermally activated polymerization behavior of bisphenol-S/aniline based benzoxazine
作者:Yanfang Liu、Zaiqin Yue、Jungang Gao
DOI:10.1016/j.polymer.2010.06.009
日期:2010.7
chromatography. The ring-opening polymerization of BS-a monomer was investigated with FTIR under air and nitrogen atmospheres, and with differential scanning calorimetry (DSC) in both dynamic and isothermal conditions. The FTIR results show that the absorption intensities of C–O–C, C–N–C, and oxazine ring decrease gradually with temperature and time rising during the polymerization reaction. The change rates of
通过溶液法合成了一种双官能苯并恶嗪单体6,6'-双(3-苯基-3,4-二氢-2 H-苯并[e] [1,3]恶嗪基)砜(BS-a)双酚S,苯胺和甲醛。苯并恶嗪的化学结构由1 H和13确证C核磁共振波谱,傅立叶变换红外(FTIR)光谱,元素分析和尺寸排阻色谱。BS-a单体的开环聚合反应是通过FTIR在空气和氮气气氛下以及差示扫描量热法(DSC)在动态和等温条件下进行的。FTIR结果表明,在聚合反应过程中,随着温度和时间的增加,C–O–C,C–N–C和恶嗪环的吸收强度逐渐降低。在不同的大气环境下,恶嗪环的一些吸收强度的变化率受到影响,在相同的反应温度和相同的时间下,氮在空气中的转化率要高于空气中的转化率。动态聚合DSC结果的动力学参数分别用Kissinger和Ozawa方法进行了评估。等温DSC结果表明,BS-a单体的聚合反应遵循自催化机理。