文章摘要
梯度结构设计对三元乙丙橡胶发泡材料性能的影响
Effect of Gradient Structure Design on the Properties of EPDM Foamed Material
  
DOI:10.16865/j.cnki.1000-7555.2018.05.010
中文关键词: 三元乙丙发泡材料  梯度结构  叠层法  压缩应力-应变  能量吸收
英文关键词: ethylene propylene diene monomer foamed material  gradient structure  lamination method  compressive stress-strain  energy absorption
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作者单位
杨 鎏, 王 鹤, 赵树高 青岛科技大学 橡塑材料与工程教育部重点实验室山东 青岛 266042 
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中文摘要:
      改变过氧化二异丙苯(DCP)用量制备不同发泡密度的三元乙丙橡胶(EPDM)发泡材料,并且通过叠层法制备发泡密度沿厚度方向呈梯度变化的EPDM梯度发泡材料。考察了发泡密度和梯度结构设计对EPDM混炼胶的硫化发泡特性、硫化胶的泡孔微观形态、力学性能、压缩应力-应变性能以及能量吸收特性的影响。结果表明,随着DCP用量的增大,发泡材料密度增大,发泡倍率降低,力学性能得以改善。与发泡密度最低的最外层均质发泡EPDM材料相比,梯度发泡材料的拉伸强度和100%定伸应力提高,断裂伸长率下降,压缩弹性模量增大。梯度结构设计影响发泡材料吸能值和能量吸收效益达到最优的极值。因此,梯度发泡材料在合适的应力范围内可以不牺牲力学性能,同时获得最大的吸能能力。
英文摘要:
      The EPDM foam materials with different foaming densities were fabricated by using dicumyl peroxide (DCP) as variables. The samples with different foaming densities were compounded by lamination method.The curing-foaming characteristics, morphology and mechanical properties, compressive stress-strain properties and energy-absorption characteristics of EPDM were studied. The results show that the tensile strength and modulus at 100% offunctionally graded foam are greatly improved compared to uniform distribution EPDM. In a range of stress, the efficiency of energy absorption and ideality of functionally graded foam increase most, in addition the performances are better than those of any uniform distribution samples.In the appropriate range of use, the functionally graded foam not only obtains the best energy absorption characteristics, but also has acceptable mechanical properties.
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