Sodium montmorillonite clay loaded novel organic-inorganic hybrid composites: Synthesis and characterization

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• 作者：Kishore K. Jena^a ; K.V.S.N. Raju^a ; Ramanuj Narayan^a ; ^b ; T.K. Rout^a ; ^b ; ^{tkrout5@gmail.com}
• 关键词：Coating ; Thermomechanical properties ; Sandwich structures ; Dynamic mechanical thermal analysis (DMTA) ; Heat treatment
• 刊名：Progress in Organic Coatings
• 出版年：2012
• 期刊代码：70_03009440
• 类别：ce
• 出版时间：September-October, 2012
• 卷：75
• 期：1-2
• 页码：33-37
• 文件大小：779 K

摘要

Polyimide based organic matrix loaded with 1, 3 and 5 wt.%of sodium montmorillonite (Na⁺MMT) clay particles, i.e. (polyimide-clay-1, polyimide-clay-3 and polyimide-clay-5), were developed by thermal imidization method. Differential scanning calorimetry, thermogravimetric analysis and dynamic mechanical thermal analysis were used to understand thermal properties. Universal testing machine was used to study mechanical strength properties. The results from thermal analysis indicated that the glass transition temperature of the hybrid composite was increased by about 10 掳C and its thermal stability was obviously improved, in comparison with pure polyimide. The investigation on the mechanical properties showed that the tensile strength could be obviously increased by adding 1 wt.%(by weight) (Na⁺MMT) clay particles to the matrix. The gel content, adhesive strength, Impact strength, water absorption resistance and abrasion resistance were increased with increasing the clay concentration in polyimide matrix.