Surface Reaction of Ozone at High Concentration with Isotactic And Syndiotactic Polypropylene

Fluorescence confocal microscopy as effective testing method of polypropylene fibers and single polymer composites

“…Therefore we are convinced that the observed photoluminescence is not an artefact associated with impurities. Furthermore, IR photoacoustic spectroscopy indicates the lack of oxidation of iPP as evidenced by the absence of CO stretching vibration around 1700e1800 cm À1 [28,29]. The spectral range of observed PL significantly differs from described in literature and the absence of oxygen groups in tested iPP fibers structures indicate a completely different mechanism of polypropylene luminescence.…”

In situ ozonolysis of polypropylene during extrusion to produce long-chain branches with the aid of TMPTA

“…31,32 Furthermore, ozone has been used to induce polar groups on the polymer surface through oxidation or graing reactions. [33][34][35][36][37] Previously, we used ozone to initiate molecular breakdown and oxidization of PP macromolecules with highly efficiency during extrusion process. 38 In this work, the production of LCB-PP via in situ ozonolysis during reactive extrusion process in the presence of multi-functional monomers (trimethylolpropane triacrylate, TMPTA) is reported.…”