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将乙烯-醋酸乙烯酯共聚物(EVA)、丙烯酸酯弹性体(AR)和云母(Mica)熔融共混制备了一系列复合材料。动态力学分析发现,EVA与AR共混后,tanδ在5℃附近出现了新峰;在EVA-AR(80/20)中加入聚合级空间受阻酚MPDI(4-甲基-苯酚与二环戊二烯和异丁烯的反应产物),tanδ峰值逐渐增大,且峰位置逐渐向高温方向偏移。云母的加入使EVA-AR-MPDI共混物的tanδ峰位置明显向高温方向偏移,而且峰宽拓宽明显。随着云母含量的增加,高温区tanδ数值逐步变大,损耗模量E″大幅度提高,当云母含量为58.8 wt%时E″峰值由未加云母时的79 MPa增加至280 MPa,并且E″峰位置向高温偏移。氢键红外光谱和扫描电镜分析结果表明,复合材料阻尼性能有所提高。
A series of composites were prepared by melt blending ethylene-vinyl acetate copolymer (EVA), acrylate elastomer (AR) and mica (Mica). Dynamic mechanical analysis showed that the tanδ showed a new peak near 5 ℃ after the blending of EVA and AR. The polymerization grade sterically hindered phenol MPDI (4-methyl-phenol and dicyclopentadiene The reaction product of diene and isobutylene), the tan δ peak gradually increases, and the peak position gradually shifts toward the high temperature. With the addition of mica, the tan δ peak position of EVA-AR-MPDI blends obviously shifts to the high temperature direction, and the broadening of the peak width is obvious. With the increase of mica content, the value of tan δ in the high temperature region gradually increases and the loss modulus E “increases greatly. When the content of mica is 58.8 wt%, the peak value of E” increases from 79 MPa without mica to 280 MPa, and E "Peak position to the high temperature shift.The hydrogen bond infrared spectroscopy and scanning electron microscopy analysis showed that the composite damping properties have increased.