Effects of electron beam irradiation on thermal and mechanical properties of poly(lactic acid) films

2016 ◽  
Vol 133 ◽  
pp. 293-302 ◽  
Author(s):  
Mohammed Mansouri ◽  
Abdelkader Berrayah ◽  
Christophe Beyens ◽  
Christine Rosenauer ◽  
Charafeddine Jama ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Lactic Acid ◽  
Electron Beam Irradiation ◽  
Poly Lactic Acid ◽  
Thermal And Mechanical Properties ◽  
Beam Irradiation

Mechanical properties of bio-fiber composites reinforced with luffa cylindrica irradiated by electron beam

2019 ◽  
Vol 33 (26) ◽  
pp. 1950305 ◽  
Author(s):  
Subhashree Patra ◽  
Kamal Lochan Mohanta ◽  
Chhatrapati Parida
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Lactic Acid ◽  
Electron Beam Irradiation ◽  
Natural Fiber ◽  
Waste Product ◽  
Fiber Composites ◽  
Poly Lactic Acid ◽  
Beam Irradiation ◽  
Luffa Cylindrica

This investigation aims to analyze the effects of electron beam irradiation on the morphological and mechanical properties of green composites synthesized using natural fibers of luffa cylindrica (LC) and biodegradable polymer poly (lactic) acid. This work aims to transform the low priced, readily available, agricultural waste product LC fiber into a high value product. The major challenge during the fabrication of natural fiber composites is the chemical bonding between hydrophilic LC fiber and hydrophobic poly lactic acid (PLA) matrix. Due to the disagreeing chemical nature of fiber and matrix, they are not compatible. The fibers are exposed to physical treatment, i.e., electron beam irradiation of different doses 0.5, 1.0, 2.0, 4.0 and 10.0 Gy using 6 MeV medical linear accelerator to increase the compatibility of LC fiber with PLA. Before irradiation, LC fibers are modified with calcium salts to explore the use of composite materials in biomedical terrain. When PLA is reinforced with irradiated LC fiber, tensile strength increases by 79.87% and flexural strength increases by 177%. Mechanical parameters generated by flexural and tensile tests of this study can be explored to have various clinical applications like bone implant, replacement of cervical cavities, etc.

Influence of electron beam irradiation on the mechanical properties of pbat/pla polymeric blend / Influência da irradiação por feixe de electrões nas propriedades mecânicas da mistura polimérica pbat/pla

2021 ◽  
Vol 7 (8) ◽  
pp. 79528-79537
Author(s):  
Pedro Marcio Munhoz ◽  
Fernando Codelo Nascimento ◽  
Leonardo Gondim de Andrade e Silva ◽  
Julio Harada ◽  
Wilson Aparecido Parejo Calvo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Impact Resistance ◽  
Poly Lactic Acid ◽  
Beam Irradiation ◽  
Radiation Process ◽  
Izod Impact ◽  
Polymeric Blend

The aim of this research was to evaluate the changes in the mechanical properties of poly(butylene adipate co-terephthalate)/poly(lactic acid) (PBAT/PLA) polymeric blend after the radiation process at different radiation doses. The irradiation was performed in an electron beam accelerator, with 1.5 MeV of energy and 25 mA electric current. The samples were irradiated with doses of 5, 10, 15, 25, 50, 65 and 80 kGy. Both irradiated and non-irradiated samples were characterized by Izod pendulum impact resistance and tensile strength at rupture. The results showed an increase of 44% in relation to Izod impact resistance at a dose of 65 kGy. However, the module of elasticity decreased 56% and tensile strength at rupture decreased 55% at the same radiation dose. In relation to elongation, significant alterations caused by electron beam irradiation was not observed. Therefore, it can be concluded that irradiated blends could be used to make environmentally friendly products, which could absorb impact energy. 

Electron-Beam Irradiation Effect on Thermal and Mechanical Properties of Nylon-6 Nanocomposite Fibers Infused with Diamond and Diamond Coated Carbon Nanotubes

2016 ◽  
Vol 15 (01n02) ◽  
pp. 1650004 ◽  
Author(s):  
Muhammad A. Imam ◽  
Shaik Jeelani ◽  
Vijaya K. Rangari ◽  
Michelle G. Gome ◽  
Esperidiana. A. B. Moura
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Nylon 6 ◽  
Thermal And Mechanical Properties ◽  
Beam Irradiation ◽  
Nanocomposite Fiber ◽  
Nanocomposite Fibers ◽  
Coated Carbon

Nylon-6 is an engineering plastic with excellent properties and processability, which are essential in several industrial applications. The addition of filler such as diamond (DN) and diamond coated carbon nanotubes (CNTs) to form molded composites may increase the range of Nylon-6 applications due to the resulting increase in strength. The effects of electron-beam irradiation on these thermoplastic nanocomposites are either increase in the cross-linking or causes chain scission. In this study, DN-coated CNTs were synthesized using the sonochemical technique in the presence of cationic surfactant cetyltrimethyl ammonium bromide (CTAB). The DN-coated CNTs nanoparticles and diamond nanoparticles were then introduced into Nylon-6 polymer through a melt extrusion process to form nanocomposite fibers. They were further tested for their mechanical (Tensile) and thermal properties (thermogravimetric analysis (TGA), differential scanning calorimetry (DSC)). These composites were further exposed to the electron-beam (160[Formula: see text]kGy, 132[Formula: see text]kGy and 99[Formula: see text]kGy) irradiation using a 1.5[Formula: see text]MeV electron-beam accelerator, at room temperature, in the presence of air and tested for their thermal and mechanical properties. The best ultimate tensile strength was found to be 690[Formula: see text]MPa and 864[Formula: see text]MPa irradiated at 132 for DN/CNTs/Nylon-6 and Diamond/Nylon-6 nanocomposite fiber as compared to 346[Formula: see text]MPa and 321[Formula: see text]MPa for DN/CNTs/Nylon-6 and Diamond/Nylon-6 nanocomposite fiber without irradiation. The neat Nylon-6 tensile strength was 240[Formula: see text]MPa. These results are consistent with the activation energy calculated from TGA graphs. DSC analysis result shows that the slight increase in glass transition temperature ([Formula: see text]) and decrease in melting temperature ([Formula: see text]) which was expected from high electron-beam radiation dose.

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