为提高环氧树脂的韧性,采用氨基笼型倍半硅氧烷(POSS-NH2)改性环氧树脂.分别添加不同质量百分含量的POSS(5％、10％、20％和30％)到双酚A型环氧树脂中,经反应得到一系列杂化树脂；然后采用4,4’-二氨基二苯砜(DDS)作为固化剂固化得到含POSS的有机无机杂化材料.通过对杂化材料的冲击强度、弯曲强度进行研究,并采用SEM进行机理分析.结果表明:随着POSS含量的增加,冲击强度和弯曲强度呈先增大后下降的趋势,当POSS含量为10％时,冲击强度和弯曲强度达到最大值.SEM分析表明“裂纹钉锚”和“裂纹诱导”两种增韧机理同时存在.
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