Poly(ethylene oxide)/polyhedral oligomeric silsesquioxanes (PEO/POSSs) composites were prepared by the melting method. The investigation of their thermal characteristics was performed by the differential scanning calorimetry (DSC), while the investigation of their thermal stability was performed by the non-isothermal thermogravimetry. The glass transition temperatures, the crystallinity and the melting temperature of PEO decrease with the addition of POSS nanoparticles. FTIR analysis also confirms the decrease in PEO’s crystallinity with the addition of POSS. POSS nanoparticles shift the beginning of PEO decomposition toward lower temperatures, while they do not have a significant effect on the maximum decomposition temperature, maximum decomposition rate and the residual mass. Scanning electron microscopy analysis seems to indicate that a poor dispersion of POSS nanoparticles causes this worsening in the thermal behavior of the prepared composites. The non-isothermal decomposition of PEO/POSSs samples is more complex compared to pure PEO. POSS nanoparticles influence the beginning of the PEO’s decomposition process and its activation energy, while the kinetic model of PEO’s thermal decomposition process remains unchanged.

采用熔融法制备了聚环氧乙烷/多面体低聚倍半硅氧烷（PEO / POSSs）复合材料。通过差示扫描量热法（DSC）进行热特性的研究，而通过非等温热重法进行热稳定性的研究。随着POSS纳米颗粒的加入，PEO的玻璃化转变温度，结晶度和熔融温度降低。FTIR分析还证实，添加POSS后，PEO的结晶度降低。POSS纳米粒子将PEO分解的开始移向较低的温度，而它们对最大分解温度，最大分解速率和残余质量没有明显影响。扫描电子显微镜分析似乎表明，POSS纳米颗粒的分散性差会导致制备的复合材料的热性能恶化。与纯PEO相比，PEO / POSSs样品的非等温分解更为复杂。POSS纳米颗粒影响PEO分解过程的开始及其活化能，而PEO热分解过程的动力学模型保持不变。