Thermal analysis of polysiloxanes, aromatic polyimide and their blends |
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Authors: | Atul Tiwari Ajay K Nema SK Nema |
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Institution: | a Macromolecular Research Center, R.D. University, Pachpedi Road, Jabalpur 482001, India b Polymer Division, Material Science Center, Indian Institute of Technology, Kharagpur 721302, India |
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Abstract: | Low molecular weight poly(dimethylsiloxane) and poly(methylphenylsiloxane) were synthesized and blended with polyimide (PI) at its precursor poly(amic acid) stage. FTIR analysis has proven the retention of polysiloxanes in polyimide after the ultimate curing of blends. Differential scanning calorimetric analysis was performed on polysiloxanes to elucidate the structures present in polymers while thermogravimetric analysis (TGA) was performed on polysiloxanes, polyimide as well as their blends to evaluate the thermal stability and to analyze the effect of polysiloxane incorporation in blends. Blends have shown synergistic improvement as compared to neat polyimide. |
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Keywords: | Poly(dimethylsiloxane) Poly(methylphenylsiloxane) Polyimide Blending Thermal analysis Energy of activation |
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