提出了一种乙烯基酯共固化丁腈橡胶/羧基化聚丙烯(NBR/CPP)橡塑阻尼复合材料的研制与性能表征,制备了一种物理性能优异的乙烯基酯基橡塑阻尼复合材料,使用高锰酸钾溶液将聚丙烯羧基化,增强了橡胶与塑料的相容性及复合材料的层间结合性能,采用分子动力学(MS)预测了乙烯基酯与丁腈橡胶是否发生共固化反应及乙烯基酯与羧基化聚丙烯是否发生微观结合作用,根据乙烯基酯固化特点,研发出一种170℃温度下与乙烯基酯共固化的丁腈橡胶/羧基化聚丙烯阻尼材料,通过层间剪切试验研究了阻尼层厚度与乙烯基酯基橡塑阻尼复合材料层间剪切性能的相关性,并通过动态力学性能测试表征了阻尼材料阻尼性能与DCP用量之间的关系,采用扫描电镜对橡塑阻尼材料进行分析,得到了丁腈橡胶/羧基化聚丙烯橡塑阻尼材料的N元素分布情况与共混结构微观示意图。
The development and performance characterization of a rubber-plastic damping composite co-cured with vinyl ester,nitrile rubber/carboxylated polypropylene (NBR/CPP),was proposed,and a vinyl ester-based rubber-plastic damping composite with excellent physical properties was prepared.Potassium permanganate solution was used to achieve carboxylation of polypropylene,which enhanced the compatibility between rubber and plastic and the interlayer bonding property of composite materials.Molecular dynamics Materials Studio (MS) was used to predict whether the co-curing reaction between vinyl ester and NBR and the microbonding between vinyl ester and carboxylated PP occurred.According to the curing characteristics of vinyl ester,a kind of NBR/CPP damping material co-cured with vinyl ester at 170℃ was developed.The correlation between the thickness of damping layer and the interlayer shear properties of vinyl ester-based rubber-plastic damping composites was studied by interlayer shear tests.The relationship between the damping properties of damping materials and the amount of DCP was characterized by dynamic mechanical property tests.Scanning electron microscopy (SEM) was employed to analyze them and obtain the distribution of N elements and the microscopic schematic diagram of the blend structure of NBR/CPP rubber-plastic damping materials.
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基金资助
国家自然科学基金(52075280);山东省自然科学基金项目(ZR2019MEE088)
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