聚丙二醇与二氧化硅纳米粒子复合玻璃形成体系的动力学
Dynamics in poly(propylene glycol) and silica oxide nanoparticles composite glassforming system
摘要：
介绍了聚（丙二醇）+ SiO ${_2}$纳米复合材料的宽带介电谱和流变学研究结果。结果表明，高浓度复合材料中的动力学是由限制和吸附效应决定的，这是由限制聚合物与PPG和固体纳米颗粒之间界面处的主体系统的相互作用引起的。弛豫时间的演变遵循明确的Vogel-Fulcher-Tammann模式，这是由补充活化能温度指数分析证明。纳米粒子的强烈影响的过渡动力学和超粘性域的脆弱性。
英文摘要：
Results of broadband dielectric spectroscopy and rheological studies of poly(propylene glycol) + SiO${_2}$ nanocomposites are presented. They show that the dynamics in high-concentrated composite is determined by confinement and adsorption effects, resulting from interactions of confined polymers correspond with the host system at the interface between PPG and solid nanoparticles. The evolution of relaxation times follows the clear Vogel-Fulcher-Tammann pattern, what is proved by the supplementary activation energy temperature index analysis. The strong influence of nanoparticles on the transitional dynamics and the fragility in the ultraviscous domain was noted.
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