[Analysis Case] Heat Resistance Lifetime Prediction of Recycled Plastics (TG-MS)

This paper presents a case study on predicting the thermal lifespan of polystyrene based on kinetic analysis of pyrolysis behavior using the TG-MS method.

With the increasing awareness of environmental impact, the use of recycled plastics is advancing; however, the decrease in heat resistance due to thermal history and grinding during the plastic recycling process has become a challenge. Nevertheless, evaluating heat resistance, such as in JIS S 2029, takes a significant amount of time, leading to a demand for simpler screening methods. This document introduces a case of predicting the heat resistance lifespan of polystyrene based on kinetic analysis of thermal decomposition behavior using the TG-MS method. [Analysis Samples] Polystyrene (PS) (virgin and recycled) [Analysis Equipment] TG-DTA: Rigaku Thermo plus EVO2, GC-MS: Agilent 8890GC/5977B Inert P Kinetic analysis allows for the rapid prediction of the heat resistance lifespan of plastics, enabling a straightforward comparison of the heat resistance lifespan between virgin and recycled products. Additionally, the TG-MS method can accommodate composite materials by using characteristic MS ions of the materials, allowing for the prediction of the lifespan of individual materials in the composite concerning thermal decomposition.

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