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Non-isothermal crystallization and thermal degradation kinetics of MXene/linear low-density polyethylene nanocomposites
writer:Cao, Xinxin; Wu, Mengqi; Zhou, Aiguo
keywords:composite, linear low-density polyethylene (LLDPE), MXene, non-isothermal crystallization, thermal degradation
specific source:E-Polymer
Issue time:2017年
A novel two-dimensional material MXene was used to synthesize nanocomposites with linear low-density polyethylene (LLDPE). The influence of MXene on crystallization and thermal degradation kinetics of LLDPE was investigated. Non-isothermal crystallization kinetics was investigated by using differential scanning calorimetry (DSC). The experimental data was analyzed by Jeziorny theory and the Mo method. It is found that MXene acted as a nucleating agent during the non-isothermal crystallization process, and 2 wt% MXene incorporated in the nanocomposites could accelerate the crystallization rate. Findings from activation energy calculation for nonisothermal crystallization came to the same conclusion. Thermal gravity (TG) analysis of MXene/LLDPE nanocomposites was conducted at different heating rates, and the TG thermograms suggested the nanocomposites showed an improvement in thermal stability. Apparent activation energy (E-a) of thermal degradation was calculated by the Kissinger method, and E-a values of nanocomposites were higher than that of pure LLDPE. The existence of MXene seems to lead to better thermal stability in composites.