Scratch behavior of polycarbonate by Rockwell C diamond indenter under progressive loading

Neutron-induced modifications on Hostaphan and Makrofol wettability and etching behaviors

Fracture toughness of gamma irradiated polycarbonate sheet using the essential work of fracture

In this research work, the impact of infrared (IR) radiation on the etching parameters like bulk etch rate VB, track etch rate VT, Sensitivity S, Critical angle of etching θC and track registration efficiency η of Lexan track detector, irradiated to fission fragments from 252Cf source, were investigated. The changes in etching parameters due to infrared radiation for 0, 12 and 24 h at different temperatures (328–348 K) are discussed based on chain scission and cross-linking mechanisms. Bulk and track etch rates increase with infrared radiation in case of post-exposed as compared to un-exposed while sensitivity slightly decreases for 12 h exposure with infrared radiation but slightly increases for 24 h exposure with infrared radiation as compared to un-exposed. On the other hand, bulk and track etch rates decrease with infrared radiation in case of pre-exposed as compared to un-exposed while sensitivity slightly increases. Critical angles increase and track registration efficiency decreases with etching temperatures. Activation energies for bulk and track etching rates have been determined by fitting Arrhenius equation to the experimental data of bulk and track etch rates which show a decrease in bulk activation energies in case of post-exposed but slightly increase in case of pre-exposed as compared to un-exposed Lexan track detectors. Track activation energies show the same trend as for bulk etch rate.

Impact of infrared radiation on track etching parameters of Lexan track detector to fission fragments from 252Cf source

Effects of He–Ne laser on etching parameters of lexan (polycarbonate) plastic track detector irradiated with fission fragments

It is observed that for Lexan and Makrofol-DE polycarbonate plastic detectors the mean diameters of fission fragments from a 252Cf source increases as a result of gamma-ray exposure We have studied the bulk etching rate and track etching rate before and after gamma-ray irradiation on Lexan and Makrofol-DE polycarbonate plastics The mechanism of Lexan and Makrofol-DE polycarbonate plastic detectors can be understood with the help of this exposures It is also noted that degree of ordering of Lexan and Makrofol-DE polycarbonate is dependent on the gamma ray dose due to degradation and cross-linking processes The results show that bulk and track etch rate increases with gamma dose while activation energy associated with bulk and track etch rates at a particular temperature and sensitivity decreases with gamma dose

R. N. Chakraborty

Papers

Effect of gamma irradiation on the etching properties of Lexan and Makrofol-DE polycarbonate plastics