Synthesis and thermal properties of conjugated poly[(silylene)diacetylene silazanes] |
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| Institution: | 1. Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing 100080, People’s Republic of China;2. Student of Graduate School of Chinese Academy of Sciences, Beijing 100080, People’s Republic of China;1. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China;2. ZHENGHE electronics Co., Ltd, Jining 272023, China;1. A.N.Nesmeynov Institute of Organoelement Compounds RAS, Str.Vavilov, 28, 119991 Moscow, Russia;2. Dipartimento di Scienze Agrarie, viale Fanin 42, 40127 Bologna, Italy;3. Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Via Terracini 28, 40131 Bologna, Italy;1. The MOE Key Laboratory of Weak Light Nonlinear Photonics and School of Physics, Nankai University, Tianjin 300071, China;2. TEDA Applied Physics Institute, Nankai University, Tianjin 300457, China;1. Green Chemistry & Materials Group, Korea Institute of Industrial Technology (KITECH), Cheonan, Chungnam 31056, Republic of Korea;2. Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea;3. Department of Life Chemistry, College of Natural Science, Catholic University of Daegu, Gyeongasan, Gyeongbuk 38430, Republic of Korea;4. Department of Green Process and System Engineering, Korea University of Science & Technology (UST), Cheonan, Chungnam 31056, Republic of Korea;1. Research Group of Synthesis and Material Functionalization, Chemistry Department, Sebelas Maret University, Jl. Ir. Sutami 36A, Kentingan, Surakarta, 57126, Indonesia;2. Institute of Agricultural Technology, Johann Heinrich von Thuenen Institute, Bundesalle 50, Braunschweig, 38116, Germany |
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| Abstract: | A series of novel conjugated polymers, poly(silylene)diacetylene silazanes] having different substituents on silicon were prepared by ammonolysis of the corresponding α,ω-dichlorodiorganosilylenediacetylene oligomers. The polymers had the number-average molecular weight between 700 and 2800, and the polydispersity index between 1.07 and 1.43. The polymers showed good solubility in common organic solvents. The structures of the poly(silylene)diacetylene silazanes] were characterized by Fourier transform infrared, 1H, 13C, 29Si NMR, elemental analyses, and gel permeation chromatography. The thermal properties were measured with thermogravimetric analysis and differential scanning calorimetry. The resulting polymers had good thermal stability, and the DSC showed lower glass-transition temperature (Tg). They had good processability due to non-crystallization. Treatment of these polymers at appropriate temperature led to thermal polymerization of the acetylene unit to form a new cross-linking network system. These polymers have the potential to be used as precursors for Si/C/N-based ceramics. |
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