The effects of excimer laser irradiation at 248 nm on the surface mass loss and thermal properties of PS, ABS, PA6, and PC polymers

Abstract

ABSTRACT:Excimer laser irradiation provides a new and important method for polymer surface treatment. In this work, the weight loss of engineering polymers PC, ABS, PS, and nylon 6 were investigated following irradiation by KrF excimer laser. The experimental results revealed that the polymeric weight loss is nonlinearly related to the laser energy and laser frequency for most of the materials tested. The effects of laser irradiation on the thermal properties (T g or T m ) of the polymers were investigated using DSC. It was found that the T g and T m of these materials decreased as a result of laser treatment, indicating the degradation effect of the laser irradiation procedure.

Clay Dispersion Effects on Excimer Laser Ablation of Polymer-Clay Nanocomposites

“…Compared with polystyrene, the MMT has much higher absorption coefficient at k 5 248 nm (2.08-2.47 vs. 0.65 cm 21 ) and much lower specific heat (0.7996 vs. 1.647 J/gÁ C). [21][22][23][24] Therefore, more UV energy can be absorbed, and clay platelets are heated more efficiently resulting in accelerated photo-thermal ablation on PS chains. With increased number of clay platelets parallel to the specimen surface, more hot spots will be generated under UV irradiation, and consequently, more clay induced photo-thermal ablation will take place.…”

Perpendicularly Aligned, Size-and Spacing-Controlled Nanocylinders by Molecular-Weight Adjustment of a Homopolymer Blended in an Asymmetric Triblock Copolymer

“…After excimer-laser ablation of polymer films, the film thickness can be readily reduced and varied by controlling the ablation conditions such as fluence and repetition rate, due to the photochemical etching effect of the excimer laser. [26] The concave PS cylinders of untreated SIS + PS12k (Fig. 2b, depth ca.…”

Heterogeneity of laser‐irradiated films of polyvinyl alcohol/starch blends: effect of glycerol content

“…Polyvinyl alcohol (PVA) is a biodegradable polymer, and it can be blended with starch to produce biodegradable polymeric films, and there are scanty studies on the degradation of the biodegradable blends in various environmental conditions . Laser and γ‐ray radiation along with natural weathering can be used to study the degradation of polymers . Zhang et al .…”

“…[7,8] Laser and g-ray radiation along with natural weathering can be used to study the degradation of polymers. [9][10][11] Zhang et al [9] studied the effect of g-ray radiation on the degradation nature of PVA in aqueous solutions. They found that efficiency of degradation of PVA depends upon dose rate, PVA concentration and the amount of additives.…”

“…They found that efficiency of degradation of PVA depends upon dose rate, PVA concentration and the amount of additives. The effects of excimer laser irradiation on the thermal properties of polymers such as polystyrene, acrylonitrile butadiene styrene, polyamide and polycarbonate were studied by Sancaktar et al [10] They reported a decrease in glass transition temperature and melting temperature for these polymers after laser irradiation. Bormashenko et al [11] showed that powerful laser radiation can cause changes in the absorbance spectra of epoxy resin, polyethylene and polysulfone.…”