含马来酰亚胺和烯丙基醚的苯并噁嗪的合成与性能

Preparation and Property of Benzoxazine with Maleimide and Allyloxy Groups

合成了3-（4-烯丙氧基）苯基-3,4-二氢-6-（N-马来酰亚胺）-1,3-苯并噁嗪（AMB）,用FT-IR、1H-NMR和EA对其结构进行了表征。与传统的3-苯基-3,4-二氢-（N-马来酰亚胺）-1,3-苯并噁嗪（MIB）相比,AMB的分子结构中多了一个烯丙基醚基团。AMB可溶于丙酮、甲醇、氯仿、四氢呋喃等普通有机溶剂,熔点115℃。用DSC和TGA对AMB和MIB的热聚合行为进行了比较,发现烯丙基醚官能团引入后的AMB熔点更低;于氮气条件下,150℃热处理AMB,可大幅度地降低热处理产物的再次热聚合温度,从而使其在相对低的温度下（150℃~200℃）得到充分的固化;AMB固化产物的热稳定性比MIB更好,5%热失重温度（T5）从375℃上升到449℃,800℃残炭率从56%上升到65%。

A novel benzoxazine compound, 3-（4-allyloxy） phenyl-3, 4-dihydro-2H-6-（N- maleimido）-1,3-benzoxazine（AMB）, was synthesized. Structure of AMB was confirmed by FTIR and 1H-NMR as well as EA. Only a little difference in structure from the traditional benzoxazine compound, 1-（3-phenyl-2H, 4H, benzo [-3, 4-e-] 1, 3-oxazaperhydroin-6-yl） azoline-2, 3- dione （MIB）, is that AMB has a flexible and thermally reactive allyloxy group in molecular structure. AMB was found to have a melting point of 115 C, and readily soluble in common organic solvents, such as acetone, methanol, chloroform, tetrahydrofuran et al. Using DSC and TGA technology, Thermal properties of AMB were studied comparing to that of MIB. AMB could be cured at relatively lower temperatures （150℃-200℃）. After thermal self-polymerization of AMB at 150 ＇C for 20 min, the product showed a five percent mass temperature（rs） of 449℃ and a char yield of of 650% at 800 ℃, respectively, much higher than that of MIB （Ts： 375 ℃ ： char yield： 56% at 800℃）.