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采用溶液插层法分别制备了含乙烯基的有机蒙脱土(VMMT)和不含乙烯基的有机蒙脱土(OMMT),并通过与三元乙丙橡胶(EPDM)机械共混方法制备了VMMT/EPDM、OMMT/EPDM两种纳米复合材料,对复合材料的力学性能和气体阻隔性能进行了研究。实验发现:当添加相同份数有机蒙脱土时,VMMT/EPDM复合材料的力学性能和气体阻隔性能优于OMMT/EPDM复合材料;当有机蒙脱土添加量为5份时,OMMT/EPDM的拉伸强度提高了60%、100%伸长模量提高了68%,N2透气率降低了29%;当有机蒙脱土添加量为7份时,VMMT/EPDM的拉伸强度提高了99%、100%伸长模量提高了157%、N2透气率降低了52%。结果表明:通过含乙烯基官能团的有机插层剂改性后,有机蒙脱土/EPDM纳米复合材料的力学性能和气体阻隔性能显著提高。
Vinyl-containing organic montmorillonite (VMMT) and vinyl-free organic montmorillonite (OMMT) were prepared by solution intercalation method and were prepared by mechanical blending with EPDM VMMT / EPDM and OMMT / EPDM nanocomposites, the mechanical properties and gas barrier properties of the composites were studied. The experimental results show that the mechanical properties and gas barrier properties of VMMT / EPDM composites are better than that of OMMT / EPDM composites when OMMT / EPDM composites are added in the same proportion of OMMT / EPDM composites. When the addition amount of OMMT / EPDM composites is 5, The tensile strength of VMMT / EPDM increased by 60%, the modulus of elongation at 100% increased by 68% and the permeability of N2 decreased by 29%. The tensile strength of VMMT / EPDM increased by 99% when the amount of organic montmorillonite was 7% , 100% elongation modulus increased 157%, N2 permeability decreased by 52%. The results show that the mechanical properties and gas barrier properties of organomontmorillonite / EPDM nanocomposites are significantly improved by organic intercalation agents containing vinyl functional groups.