A5021224064- Polymer crystallization and properties
- Advanced Polymer Synthesis and Characterization
- Polymer Nanocomposite Synthesis and Irradiation
- Surfactants and Colloidal Systems
- Material Properties and Processing
- Recycling and Waste Management Techniques
- Bone Tissue Engineering Materials
- Polymer Science and PVC
- Silicone and Siloxane Chemistry
- Non-Destructive Testing Techniques
- Metal and Thin Film Mechanics
- Thermal Analysis in Power Transmission
- Railway Systems and Materials Science
- Magnesium Oxide Properties and Applications
- Layered Double Hydroxides Synthesis and Applications
- High voltage insulation and dielectric phenomena
Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco
2016-2025
University of Toronto
2019-2022
Universidade Federal de Pernambuco
2012
Abstract Poly(methyl methacrylate) (PMMA) is a polymer that can be used in applications requiring its exposition to gamma radiation, nevertheless, the radiation induces main chain scission backbone, leading modification some properties. Therefore, using materials such as layered double hydroxide (LDH), was evaluated new shielding agent. This work synthesized LDH and added PMMA by an in-situ polymerization method. Viscosimetric analysis showed at 0.25 wt% concentration promotes radiolytic...
In a previous publication [Macromolecules 2019, 52, 5245–5254], we described the synthesis of surfactant-free latex dispersions nanoparticles (NPs) based on emulsification preformed proprietary BASF polymer (MnGPC = 5000 g/mol, D̵ 3), in which −COOH groups were partially neutralized by using ammonia. The NPs these then cross-linked with neopentyl glycol diglycidyl ether (NGDE) to increase molecular weight, followed reaction monoglycidyl reduce acid number and lower glass transition...
Polycarbonate is an engineering polymer due its outstanding properties and widely used in several different applications. In some of these applications it can be exposed to certain liquids/solvents. many cases, this liquid exposure may cause effect known as Environmental Stress Cracking (ESC), which lead crack formation on the surface consequent reduction mechanical resistance, with loss lifetime. On other hand, polycarbonate medical supplies are often gamma rays radio-sterilization process,...
Composite insulators aged in-service for almost 10 years at the transmission line of 230 kV, in an area where brittle fracture a composite insulator occurred, were inspected by micro-computed tomography, µ-CT, and scanning electron microscope, SEM. As result, several cracks with different depths under pollutant scale confined silicone housing detected µ-CT. Surface was observed Many randomly oriented from micrometers size observed. However, larger evaluated µ-CT appear essentially...
Waterborne polyurethane (WPU) coatings used for moisture protection of surfaces have been broadly. They considered environmentally friendly because their synthesis releases less or no volatile organic compounds (VOCs) to the atmosphere. With Covid-19 pandemic concerns, cleaning protocols these applied and scientific knowledge about effects liquids on WPU is necessary. In this work, diffusion experiments were performed using four liquids, in pure filled with graphene oxide (GO). Detergent had...