含硅双马来酰亚胺的合成及表征

SYNTHESIS AND CHARACTERIZATION OF BISMALEIMIDES CONTAINING SILICONE

采用新的合成路线制得了Ｎ－（４－羟基苯基）马来酰亚胺，并以此为起始反应物合成了３种新型含硅双马来酰亚胺。所合成的含硅双马来酰亚胺的分子结构采用红外光谱及１Ｈ－ＮＭＲ进行了表征。

Bismaleimide-based resins are by far the more widely used high performance composite matrix for their excellent elevated temprature properties,but the high stiffness of bismaleimide backbone results in very low elongation at break. In an effort to develope new bismaleimide with improved properties,We had recently Synthesized a new series of bismaleimides bearing siloxanelinkage with N-(4-hydroxyphenyl) maleimide as starting reactant.Prepared bismaleimides were charactenzed by IR and NMR.All monomers showed characteristic absorptions near 1100 cm-1 due to Si-O-C stretching. Absorption bands around 1395￣1389 and 1069￣1252 cm-1 were attributed to asymmetric and symmetric Si-CH3 deformation respectively. All bismaleimides exhibited absorption bonds at about 1600 cm-1 because of the C=C stretching vibritions. The result of 1H-NMR spectra are in accordance with that of IR spectra.