Abstract
Lead (II) sulfide (PbS) were synthesized by sonochemical method and crystals with cubic structure exhibit aggregated nanoparticles with size in the range of 50-100 nm. Commercial Poly(methyl methacrylate) (PMMA) containing the PbS nanoparticles (PbS-NP) exposed to gamma irradiation were investigated and both the viscosity-average molar mass (Mv) and degradation index (DI) values were measured. Ours results showed decreases in molar mass when the systems were gamma irradiated, i. e., random scission effects that take place in the main chain. On the other hand, DI results showed that the addition of PbS-NP at 0.3 wt% into the PMMA matrix decreased 100% the number of main chain scissions. Results about the free radical scavenger action of the PbS-NP were obtained by use of 2,2-diphenyl-1-(2,4,6-trinitrophenyl)-hydrazyl radical (DPPH) and are discussed in this study. Analysis of infrared spectra, refraction index, mechanical, and thermal properties showed influence of the PbS-NP in the physical behavior of PMMA.
Highlights
In recent years, there has been considerable interest in nanoscale chalcogenides due to their remarkable properties and promising application prospects[1]
The decrease in chain scissions occurred in Poly(methyl methacrylate) (PMMA)/PbS nanoparticles (PbS-NP) films, in special at 0.30 wt% of PbS concentration. In this concentration the Mv value not undergoes changes after gamma irradiation. These data represent a decrease of 100% in scissions per original molecule of PMMA, evidencing an effective radiolytic stabilization of PMMA matrix owed to the presence of PbS-NP
The results indicate that the PbS-NP tended to form aggregates that were dispersed into the PMMA matrix
Summary
There has been considerable interest in nanoscale chalcogenides due to their remarkable properties and promising application prospects[1] Among these materials, lead (II) sulfide (PbS) has attracted much attention for its well-known narrow band gap semiconducting features. Inorganic-polymer materials have attracted considerable attention in recent years due to their new physical and chemical properties. This material can have specialized properties that cannot be found in their respective single phase and enhanced electrical, mechanical and optical properties have been reported. Our findings suggest that PbS-NP is suitable additive for improving the properties of PMMA with radiation resistance applications
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
