On the action of ozone at high concentration on various grades of polyethylene and certain straight chain paraffins

摘要: Abstract The surface functionalisation of UHMWPE (ultra high molecular weight polyethylene) was successfully achieved by the action ozone (10% in oxygen) under mild conditions. kinetics gas–solid reaction between O3 and powder form were measured an IR gas cell pseudo-first-order rate constant k′UHMWPE = 1.9 × 10−4 s−1. resulting surface-oxidized studied FT-IR spectroscopy nature functionalities determined. Furthermore, DSC (differential scanning calorimetry). It evident that attacks oxidizes amorphous phase preserving crystalline because after treatment there increase % crystallinity. Two other polyethylene grades having respectively Mw = 15,000 Da (defined as LMWPE = low Mw = 4000 Da VLMWPE = very low model compounds comparison to their with ozone. Commercial liquid paraffin n-dodecane used study concentration alkanes.