o-Carborane-Containing Poly(siloxane-arylacetylene)s With Thermal and Thermo-Oxidative Stabilities |
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Authors: | Yun Jiang Xiaojie Li Yan Zhou Lei Du |
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Affiliation: | Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, P. O. Box 399, Shanghai 200237, China |
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Abstract: | A series of poly(siloxane-arylacetylene)s with o-carborane in the backbone (CB-PSOA)s were prepared by the coupling reaction between poly(siloxane-arylacetylene) (PSOA) and decaborane (B10H14) in the presence of CH3CN. CB-PSOAs were characterized by Fourier-transform infrared (FT-IR) spectroscopy, nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and Pyrolysis–gas chromatography–mass spectrometry (Py–GC–MS). The results show that the average amount of carborane units in a CB-PSOA chain could be raised when the molar ratio of B10H14 to PSOA is increased from 0.6 to 2.4. The crosslinking reaction could be carried on at above 140°C for CB-PSOAs. The CB-PSOA thermosets show excellent thermo oxidative stability with over 85% residue yield at 1000°C in air. |
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Keywords: | Poly(siloxane-arylacetylene) carborane-containing polymer thermosetting polymer thermal stability thermo oxidative stability |
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