Synthesis and characterization of a silarylene-siloxane-diacetylene polymer and its conversion to a thermosetting plastic |
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| Authors: | Craig L HomrighausenTeddy M Keller |
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| Affiliation: | Advanced Materials Section, Code 6127, Chemistry Division, Naval Research Laboratory, Washington, DC 20375-5320, USA |
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| Abstract: | The synthesis and characterization of a linear silarylene-siloxane-diacetylene polymer 1 and its conversion to a highly cross-linked thermoset 4 are discussed. The linear polymer was prepared via polycondensation of 1,4-bis(dimethylaminodimethylsilyl)butadiyne, (CH3)2N-Si(CH3)2-CC-CC-(CH3)2SiN(CH3)2], 2 with 1,4-bis(hydroxydimethylsilyl)benzene 3. Conversion to a thermoset 4 occurs through the diacetylene groups above 300 °C. The thermoset was observed to exhibit long-term thermo-oxidative stability up to 350 °C in air as determined by thermogravimetric analysis. |
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| Keywords: | Siloxane Thermoset High temperature |
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