研究目的
Investigating the thermal stability and phase transitions under heating of pristine PMMA and PMMA/fullerene composite films.
研究成果
The incorporation of fullerene into PMMA improves its thermal stability and alters the distribution of mass loss during degradation. The glass transition temperature of the composites varies with the fullerene content, showing a plasticizing effect at low concentrations and restricted chain mobility at higher concentrations. The study provides new insights into the thermal behavior of PMMA/fullerene composites, suggesting potential applications in materials requiring enhanced thermal stability.
研究不足
The study is limited to PMMA/fullerene composite films with fullerene content up to 3 wt. %. The thermal behavior of composites with higher fullerene concentrations or different polymer matrices was not explored.
1：Experimental Design and Method Selection:
The study employed thermogravimetric (TG) analysis and differential scanning calorimetry (DSC) to evaluate the thermal degradation parameters and phase transitions of PMMA/fullerene composite films.
2：Sample Selection and Data Sources:
PMMA/fullerene composite films with varying mass fractions of fullerene (C60) from
3：05–3 wt. % were prepared by casting from toluene solutions. List of Experimental Equipment and Materials:
TG 209 F1 thermal analyzer (Netzsch, Germany) and DSC 204 F 1 apparatus (Netzsch, Germany) were used for thermal analysis.
4：Experimental Procedures and Operational Workflow:
The films were heated from 298 to 773 K at a heating rate of 10 K/min for TG analysis and up to 400 K for DSC measurements.
5：Data Analysis Methods:
The thermal degradation was analyzed in terms of mass loss and phase transitions, with characteristic temperatures determined from the TG and DSC curves.
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