Here, we investigate the ice nucleation ability of seven different microplastics substances in the immersion freezing mode. We focus on polymers prevalent in the atmosphere : polypropylene (PP), polyethylene terephthalate (PET) and polyethylene (PE). For each polymer type, we included at least one commercial sample and one sample generated from the breakdown of a frequently used commercial product. We further test if ice nucleation changes after exposure to O3 and a combination of UV light and O3.