【摘要】 分别用有机蒙脱石DK2和MHAB-MMT改性邻苯二甲酸二烯丙酯/玻璃纤维(DAP/GF)层合板,通过X射线衍射仪分析、透射电子显微镜(TEM)等测试方法对它们在DAP基体中的分散状况,及对层合板纵向弯曲性能及层间剪切强度(ILSS)的影响进行了研究.结果表明,两种有机蒙脱石均以插层形式分散于基体中,且MHAB-MMT在基体中分散更均匀,层间距与有机蒙脱石含量的关系不大.有机蒙脱石改性剂对层合板的纵向弯曲性能影响不大,而对层间剪切强度有较大影响:用不含可聚合基团的DK2改性层合板时,ILSS没有明显增加;而用含可聚合基团的MHAB-MMT改性层合板时,添加3%~5%可使ILSS增加14.8%.合理选择改性蒙脱石的表面活性剂,对增强复合材料层合板层间性能具有重要作用.更多还原

【Abstract】 Diallyl phthalate/glass fiber laminates were modified using organo-montmorillonite DK2and MHAB-MMT,respectively.The dispersion of organo-montmorillonite in DAP matrix was studied and their effect on the longitudinal flexural properties and inter-laminar shear strength of composite laminates were investigated.X-ray diffraction results show that both organo-montmorillonites are intercalated in matrix,with the basal spacing independent of the organo-montmorillonite loading.Transmission electron microscopy images indicate that both organo-montmorillonites form an intercalated structure,with MHABMMT dispersed more homogeneously in DAP matrix.The mechanical testing results show that organomontmorillonite has little effect on the longitudinal flexural properties of composite laminates and a great influence on the inter-laminar shear strength(ILSS).The ILSS of composite laminates is found no significant increase when adding DK2containing unpolymerizable group,while the ILSS increases by 14.8%when adding MHAB-MMT containing polymerizable group,indicating that resonable choice of surfactants of organo-modified montmorillonte to improve the interlaminar properties of montmorillonte modified composite laminates is important.更多还原