Nanocomposites（PMSEPE/Q8M8^H） were prepared via solution blending of octakis（dimethylsiloxy）octasilsesquoixane（Q8M8^H） into poly（dimethylsilyleneethynylenephenyleneethynyle ne）（PMSEPE）. PMSEPE/Q8M8^H nanocom...Nanocomposites（PMSEPE/Q8M8^H） were prepared via solution blending of octakis（dimethylsiloxy）octasilsesquoixane（Q8M8^H） into poly（dimethylsilyleneethynylenephenyleneethynyle ne）（PMSEPE）. PMSEPE/Q8M8^H nanocomposites were characterized by Fourier transform infrared（FT-IR） spectroscopy, rheological measurement, differential scanning calorimetry（DSC）, scanning electron microscopy（SEM） and thermal gravimetric analysis（TGA）. The experimental results show that the hydrosilylation reaction in PMSEPE/Q8M8^H nanocomposites occurs slowly exceeding 180 ℃. PMSEPE/Q8M8^H nanocomposites can be cured at temperatures less than 260 ℃ and the cube structure of Q8M8^H keeps stable during the curing process. POSS domains are evenly dispersed in the cured nanocomposite. However, serious aggregation of POSS occurs at 15% Q8M8^H content. The thermal and thermooxidative stabilities of PMSEPE/Q8M8^H nanocomposites obviously depend on the content of Q8M8^H. The incorporation of Q8M8^H can effectively enhance the thermal and thermooxidative stabilities of cured PMSEPE. PMSEPE/Q8M8^H nanocomposites can be the candidates for applications in high temperature environment.展开更多
ZnS/bacterial cellulose/epoxy resin （ZnS/BC/E56） nanocomposites with good transparency and flexibil-ity were prepared and characterized. When the precursor Zn^2＋ concentrations were not more than I wt%, the size of...ZnS/bacterial cellulose/epoxy resin （ZnS/BC/E56） nanocomposites with good transparency and flexibil-ity were prepared and characterized. When the precursor Zn^2＋ concentrations were not more than I wt%, the size of the introduced ZnS nanoparticles was smaller than 50 nm and the distribution was homo-geneous within the composites. Under the condition, outstanding transmittance more than 70g in the visible light was obtained. By incorporation of ZnS nanoparticles with excellent thermo-optic stability to the composites, the thermo-optic coefficient was obviously increased from -361 × 10^-6 to -310 × 10^-6K^-1. The good flexibility, optical and mechanical properties endow the nanocomposites potential applica- tions in the flexible optoelectronic materials.展开更多
基金Funded by the Shanghai Leading Academic Discipline Project(B502)the Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application(Soochow University)
文摘Nanocomposites（PMSEPE/Q8M8^H） were prepared via solution blending of octakis（dimethylsiloxy）octasilsesquoixane（Q8M8^H） into poly（dimethylsilyleneethynylenephenyleneethynyle ne）（PMSEPE）. PMSEPE/Q8M8^H nanocomposites were characterized by Fourier transform infrared（FT-IR） spectroscopy, rheological measurement, differential scanning calorimetry（DSC）, scanning electron microscopy（SEM） and thermal gravimetric analysis（TGA）. The experimental results show that the hydrosilylation reaction in PMSEPE/Q8M8^H nanocomposites occurs slowly exceeding 180 ℃. PMSEPE/Q8M8^H nanocomposites can be cured at temperatures less than 260 ℃ and the cube structure of Q8M8^H keeps stable during the curing process. POSS domains are evenly dispersed in the cured nanocomposite. However, serious aggregation of POSS occurs at 15% Q8M8^H content. The thermal and thermooxidative stabilities of PMSEPE/Q8M8^H nanocomposites obviously depend on the content of Q8M8^H. The incorporation of Q8M8^H can effectively enhance the thermal and thermooxidative stabilities of cured PMSEPE. PMSEPE/Q8M8^H nanocomposites can be the candidates for applications in high temperature environment.
基金financially supported by the Program of Introducing Talents of Discipline to Universities (No. B07024)the Shanghai Leading Academic Discipline Project (No. B603)+1 种基金the National Natural Science Foundation of China (No. 51273043)the Project of the Action on Scientists and Engineers to Serve Enterprises (No. 2009GJE20016)
文摘ZnS/bacterial cellulose/epoxy resin （ZnS/BC/E56） nanocomposites with good transparency and flexibil-ity were prepared and characterized. When the precursor Zn^2＋ concentrations were not more than I wt%, the size of the introduced ZnS nanoparticles was smaller than 50 nm and the distribution was homo-geneous within the composites. Under the condition, outstanding transmittance more than 70g in the visible light was obtained. By incorporation of ZnS nanoparticles with excellent thermo-optic stability to the composites, the thermo-optic coefficient was obviously increased from -361 × 10^-6 to -310 × 10^-6K^-1. The good flexibility, optical and mechanical properties endow the nanocomposites potential applica- tions in the flexible optoelectronic materials.
