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The influence of polymer ablation on thermal plasmas was fundamentally investigated by using the induction thermal plasma technique. Polymer powders were directly subjected to Ar-induction thermal plasmas. A high-speed video camera, with a bandpass filter, was used to measure the spatial distribution of the spectral radiation intensity of C2 molecules included in the polymer-ablated vapor. Numerical prediction was also undertaken to obtain the C2 molecular fraction distribution. Results directly show the mixing aspects of polymer-ablated vapor with thermal plasmas.