Influence of polymer molecular weight on the chemical modifications induced by UV laser ablation

Article Abstract:

The influence of polymer molecular weight ([M.sub.W]) on the chemical modifications of poly(methyl methacrylate) (PMMA) and polystyrene (PS) films doped with iodonaphthalene (NaPI) and iodophenanthrene (PhenI) is investigated. The results obtained for femtosecond laser ablation enables the successful processing of a wide range of substrates as those found in restoration of artwork or for biological applications since their success is related to highly restricted and selective chemistry.

Polystyrene, Styrene Resins, Polystyrene Resins NEC, Atomic properties

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Effect of molecular weight on the morphological modifications induced by UV laser ablation of doped polymers

Article Abstract:

The effect of polymer molecular weight ([M.sub.W]) on the surface morphology of poly(methyl methacrylate) (PMMA) and polystyrene (PS) films doped with iodonaphthalene (NapI) and iodophenanthrene (PhenI) following irradiation in air is investigated. The sensitive dependence of processes on [M.sub.W] occurring in a low absorbing polymer is very important for the optimization of laser processing schemes and applications.

Science & research, Unsupported plastics film & sheet, Polystyrene Film, Unsupported Plastics Film and Sheet (except Packaging) Manufacturing, Research, Radiation chemistry

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Product formation in laser irradiation of doped poly(methyl methacrylate) at 248 nm: implications for chemical effect in UV ablation

Article Abstract:

The modifications induced in haloaromatic, ArX (Ar, Nap, Phen, and An; X = Br and I), dopants dispersed within poly(methyl methacrylate) (PMMA) upon UV irradiation are examined. The results are well accounted for within a thermal model of the laser interaction with PMMA and the factors that controls the reactivity in the UV ablation of polymer substrates are illustrated.

Polymethyl Methacrylate, Chemistry, Physical and theoretical, Physical chemistry, Aromatic compounds, Polymethylmethacrylate

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