TDI-PTMG型PU/PMMA/OMMT纳米复合材料的结构及性能研究

将插层纳米复合技术与同步互穿聚合物网络(IPN)技术相结合,制备了聚氨酯(PU)/聚甲基丙烯酸甲酯(PMMA)/有机蒙脱土(OMMT)纳米复合材料.用透射电子显微镜(TEM)和力学性能测试研究了该复合材料和相应的PU/PMMA-IPN和PU材料的结构和力学性能.结果表明.PU/PMMA/OMMT纳米复合材料形成了插层/剥离型结构,其力学性能最优.对材料的制备工艺进行了研究,获得优化制备条件是:PU/PMMA质量比为60/40;OMMT,BPO,EGDMA添加量分别为单体MMA质量的5%,0.8%,2.0%,MOCA系数为0.9.

Structrue and mechanical properties of nanocomposite of PU/PMMA/oMMT

The nano-intercalating technique and the simultaneous interpenetrating polymer network(IPN) method were used together to prepare the nanocomposite of Polyurethane(PU)/Poly(Methyl Methacrylate)(PMMA)/Organo-Montmorillonite(OMMT).The structures and mechanical properties of the prepared nanocomposite and the corresponding PU/PMMA-IPN and PU materials were then investigated by means of TEM and mechanical testing.The results show that PU/PMMA/OMMT nanocomposite forms an intercalated/exfoliated structure,and that the mechanical properties of PU/PMMA/OMMT nanocomposite are obviously superior to the corresponding materials.The preparation conditions of PU/PMMA/OMMT nanocomposite were also investigated.The results show that when the mass ratio of PU to PMMA,the contents of OMMT,BPO and EGDMA,and the MOCA coefficient are respectively 60/40,5.0%,0.8%,2.0% and 0.9,the nanocomposite can be prepared in optimal conditions.