【摘要】 由三羟甲基丙烷合成了螺环原碳酸酯单体3、9—二羟甲基—3′,9′-二乙基—1,5,7,11-四氧杂螺环[5、5]十一烷单体(体积膨胀率+3.04%)以及它的预聚物,并用其来改性环氧树脂B-63.利用红外光谱、元素分析仪对螺环单体及预聚体进行了表征,依据DSC测试结果确定了改性环氧树脂的固化温度为115.9℃;利用万能材料实验机测试了固化改性环氧树脂的力学性能。实验表明:预聚体的加入明显提高了环氧树脂的粘接剪切强度和拉伸强度。更多还原

【Abstract】 An expansion monomer 3,9-dihydroxymethyl-di(6-methyl- 5-hydroxyl)-2- heptanone-l,5,7,11 -tetraoxaspiro[5,5]undecane was synthesized and its volume change during polymerization is about +3.04%.Its prepolymer was also synthesized by toluene 2,4-diisocyanide with it.The prepolymer was used to modify the properties of epoxy resin-B-63.The monomer and prepolymer were characterized by IR spectrum and elemental analysis.The curing temperature of modified epoxy resin was mesured by DSC methods (about 115.9"(2).The mechanical properties of the modified epoxy resin matrix were measured..It was found that the adhesive tensile and shear strength of the modified epoxy resin was increased.更多还原