采用SEM、TEM、DSC及材料力学性能实验方法研究了马来酸酐(MAH)接枝乙烯-辛烯共聚物弹性体(POE)对PA66/POE共混材料形态、微结构及力学性能的影响.结果表明:热引发官能化POE产物(POE-g-MAH)可显著改善PA66/POE共混材料的相容性,使材料分散相尺寸减小,分布均匀,且材料缺口冲击强度显著增大.实验发现,PA66/POE-g-MAH共混材料分散相的弹性体颗粒内部存在较多份量的有序结构,材料中的分散相颗粒具有明显促进结晶的作用,此作用引起PA66基体结晶温度增加,结晶度增大,并在分散相质量分数为15%的脆韧转变条件下,达到极大值.试样熔体的冷却速率越快,则此种促进结晶的作用就越明显.
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