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首页> 外文期刊>Journal of Applied Polymer Science >Ethylene-Propylene-Diene Terpolymer/Halloysite Nanocomposites: Thermal, Mechanical Properties, and Foam Processing
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Ethylene-Propylene-Diene Terpolymer/Halloysite Nanocomposites: Thermal, Mechanical Properties, and Foam Processing

机译：乙烯-丙烯-二烯三元共聚物/水沸石纳米复合材料：热，机械性能和泡沫加工

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摘要

Ethylene-propylene-diene terpolymer (EPDM)/halloysite nanotube (HNT) nanocomposites were prepared by melt mixing in an internal mixer using a commercially available maleated semicrystalline EPDM and HNT. Transmission electron microscopy analysis of the EPDM/HNT composites revealed that the HNTs are uniformly dispersed at a nanometer scale in the matrix. Differential scanning calorimeter studies indicated that the HNT caused an increase in the nonisothermal crystallization temperature of the EPDM. Tensile and dynamic mechanical analysis exhibited that a small amount of the HNTs effectively enhanced the stiffness of the EPDM without adversely affecting its elongation-at-break. The EPDM/HNT nanocomposites were used to produce foams by using a batch process in an autoclave, with supercritical carbon dioxide as a foaming agent. The nanocomposite foams showed a smaller cell size and higher cell density as compared to the neat EPDM foam, and the nanocomposite with 10 phr HNT produced a microcellular foam with average cell size as small as 7.8 μm and cell density as high as 1.5 × 10~(10) cell/cm~3.
机译：乙烯-丙烯-二烯三元共聚物（EPDM）/硅藻土纳米管（HNT）纳米复合材料是通过使用内部混合器使用市售的马来酸化半结晶EPDM和HNT进行熔融混合而制备的。 EPDM / HNT复合材料的透射电子显微镜分析表明，HNT在纳米尺度上均匀分散在基体中。差示扫描量热仪研究表明，HNT导致EPDM的非等温结晶温度升高。拉伸和动态力学分析表明，少量的HNT可以有效地增强EPDM的刚度，而不会对其断裂伸长率产生不利影响。 EPDM / HNT纳米复合材料用于通过在高压釜中使用超临界二氧化碳作为发泡剂的分批工艺生产泡沫。与纯EPDM泡沫相比，纳米复合材料泡沫具有较小的孔尺寸和较高的孔密度，并且具有10 phr HNT的纳米复合材料产生的微孔泡沫平均孔尺寸小至7.8μm，孔密度高达1.5×10〜 （10）格/厘米〜3。

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