▎ 摘　　要

NOVELTY - A polymer composition is brought above a threshold temperature on demand by exposing the polymer composition to red to near-infrared irradiation at a wavelength within the red to near-infrared range, where the polymer composition comprises 0.01-0.5 wt.% at least one heat-generating organic dye that generates heat above the threshold temperature when exposed to a given range of red to near-infrared irradiation. USE - The method is useful for bringing a polymer composition above a threshold temperature on demand. ADVANTAGE - The polymer composition can be brought above a desired temperature threshold under long wavelength irradiation conditions (i.e., less energetic and safer than UV-type irradiation for example). Another important advantage includes the potentiality of having a tunable heat released: by changing (i) the nature/type of heat-generating organic dye, (ii) its concentration, (iii) the power of the light delivered (irradiance), and/or (iv) the irradiation wavelength, the temperature of the system (and ultimately the control of the physico-chemical modification induced in the polymer matrix) can readily be modulated. Red-to-near-infrared irradiation penetrates much deeper within samples, than other commonly used irradiations. As a result, the method provides much better control of the temperature within the polymer composition to be heated, providing an opportunity to apply the method to thick samples (cm thick). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of a heat-generating organic dye adsorbing in the red to near-infrared, for reshaping thermoplastic polymer article; bonding together two thermoplastic polymer or elastomer articles; separating two pieces of a thermoplastic polymer or elastomer article; self-healing or self-repairing a thermoplastic polymer article; recycling a composite polymer composition; recycling or depolymerizing a polymer; and/or separating two articles bonded by a polymer layer.