Thermal insulation behaviour of Ethylene propylene diene monomer rubber/kevlar fiber based hybrid composites containing Nanosilica for solid rocket motor insulation,Journal of Applied Polymer Science

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Thermal insulation behaviour of Ethylene propylene diene monomer rubber/kevlar fiber based hybrid composites containing Nanosilica for solid rocket motor insulation
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-22 , DOI: 10.1002/app.49934
Kesiya George ₁ , Smita Mohanty ₁ , Manoranjan Biswal ₁ , Sanjay K. Nayak ₁

Affiliation

The current research discusses the properties of an elastomeric heat‐shielding material, based on nano‐silica (NS) filled ethylene propylene diene monomer (EPDM) rubber/Kevlar fiber (KF) hybrid composites. The developed elastomeric insulating material consists of an aromatic polyamide fiber (KF) and silica nanoparticles. An in‐depth analysis of mechanical properties, density, coefficient of thermal expansion, thermal conductivity, thermogravimetric analysis, and heat release rate of the insulating materials ‐was performed. TEM micrograph represents an excellent distribution of nanoparticles in the EPDM matrix. The improvement in the mechanical and the flame retardancy of the NS filled EPDM/KF hybrid composite insulations is based on the fiber/matrix adhesion. Maleic anhydride grafting confers polarity to the nonpolar rubber matrix. The char residues of the insulations inspected by scanning electron microscopy and energy dispersive spectroscopy are depicting a rigid and rough surface by the optimal composites, which can aid in better insulation. The optimal formulation of the hybrid composites exhibited a 220% enhancement in char residue with improved thermal stability and mechanical properties.

中文翻译：

固体火箭发动机绝缘用含纳米二氧化硅的乙烯丙烯二烯单体橡胶/凯夫拉纤维基混杂复合材料的隔热行为。

当前的研究讨论了一种基于纳米二氧化硅（NS）填充的乙烯丙烯二烯单体（EPDM）橡胶/芳纶纤维（KF）混合复合材料的弹性体隔热材料的性能。开发的弹性体绝缘材料由芳族聚酰胺纤维（KF）和二氧化硅纳米颗粒组成。进行了绝缘材料的机械性能，密度，热膨胀系数，导热系数，热重分析和放热率的深入分析。TEM显微照片代表了纳米颗粒在EPDM基质中的出色分布。填充NS的EPDM / KF混合复合绝缘材料的机械性能和阻燃性的提高是基于纤维/基质的粘合性。马来酸酐接枝将极性赋予非极性橡胶基质。通过扫描电子显微镜和能量色散光谱法检查的绝缘体残炭残渣通过最佳复合材料描绘出刚性和粗糙的表面，有助于更好地绝缘。杂化复合材料的最佳配方在炭渣中表现出220％的增强，同时具有改善的热稳定性和机械性能。

更新日期：2020-11-25

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