scholarly journals Increased Tensile Strength of Carbon Nanotube Yarns and Sheets through Chemical Modification and Electron Beam Irradiation

2014 ◽  
Vol 6 (9) ◽  
pp. 6120-6126 ◽  
Author(s):  
Sandi G. Miller ◽  
Tiffany S. Williams ◽  
James S. Baker ◽  
Francisco Solá ◽  
Marisabel Lebron-Colon ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Electron Beam ◽  
Carbon Nanotube ◽  
Chemical Modification ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Carbon Nanotube Yarns

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. 

NBR-PANI.DBSA BLENDS: EFFECT OF ELECTRON BEAM IRRADIATION

2013 ◽  
Vol 86 (1) ◽  
pp. 68-85 ◽  
Author(s):  
K. C. Yong
Keyword(s):  
Tensile Strength ◽  
Electron Beam ◽  
Electrical Properties ◽  
Electron Beam Irradiation ◽  
Cross Linking ◽  
Density Level ◽  
Beam Irradiation ◽  
Cross Link ◽  
Electrically Conductive ◽  
Good Potential

ABSTRACT The electron beam irradiation technique was successfully used to cross-link poly(butadiene-co-acrylonitrile)-polyaniline dodecylbenzenesulfonate [NBR-PAni.DBSA] blends. Significant increase in cross-linking densities of all blends with doses of irradiation (up to 200 kGy) was observed, and a reasonably high cross-linking density level (in the order of 1030 m−3) also was achieved. All electron beam–irradiated NBR-PAni.DBSA blends exhibited good tensile properties (with tensile strength up to ∼20 MPa), with values that are comparable to those of similar blends cross-linked with either conventional sulfur or peroxide techniques. This kind of irradiation-induced cross-linking technique (at doses up to 200 kGy) also did not interrupt the blends' electrical properties after the blends were sufficiently stabilized for at least 24 h. The irradiated NBR-PAni.DBSA blends also possessed good electrical properties, that is, a single conductivity percolation threshold and high conductivities up to the order of 10−2 S.cm−1. All of these findings indicate a good potential for using the electron beam irradiation technique to prepare highly cross-linked, electrically conductive NBR-PAni.DBSA blends.

A study of roles of different valence of copper oxide interaction with electron beam irradiation in polyethylene composite

2015 ◽  
Vol 30 (7) ◽  
pp. 915-937
Author(s):  
Soo-Tueen Bee ◽  
Lee Tin Sin ◽  
CT Ratnam ◽  
Gin-Khuan Chua ◽  
AR Rahmat
Keyword(s):  
Tensile Strength ◽  
Electron Beam ◽  
Crystallite Size ◽  
Electron Beam Irradiation ◽  
Cross Linking ◽  
Beam Irradiation ◽  
Polyethylene Composite ◽  
Loading Level ◽  
Irradiation Dosage ◽  
Ldpe Composites

The aim of this research was to investigate the interaction of electron beam irradiation on the different valence of copper (I) and copper (II) oxides (Cu2O and CuO) added low-density polyethylene (LDPE) composites. The results showed the increasing of Cu2O loading level in replacing the CuO has significantly reduced the gel content (or degree of cross-linking networks) in LDPE matrix. This is due to the poorer effect of Cu2O in inducing the polymeric free radicals. Meanwhile, the application of low irradiation dosage (≤100 kGy) has significantly increased the crystallite size for crystallite peak (110) of all LDPE composites. However, further increment in irradiation dosages from 100 to 300 kGy has gradually reduced the crystallite size of deflection peak (110). The tensile strength of all LDPE composites was gradually decreased with increasing of Cu2O loading level due to agglomeration of Cu2O and CuO particles in LDPE matrix. In addition, the increasing of irradiation dosages on all Cu2O /CuO added LDPE composites has gradually increased the tensile strength by inducing the formation of the cross-linking networks in LDPE matrix. Nevertheless, the increasing of irradiation dosage has gradually decreased the elongation at break of all Cu2O /CuO added LDPE composites. This is due to the higher degree of cross-linking networks in LDPE matrix could restrict the mobility of LDPE macromolecular chains when subjected to straining stress.

scholarly journals Superior Interaction of Electron Beam Irradiation with Carbon Nanotubes Added Polyvinyl Alcohol Composite System

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4334
Author(s):  
Soo-Tueen Bee ◽  
Nicole Ooi Ker Qi ◽  
Lee Tin Sin ◽  
Hon-Meng Ng ◽  
Jun-Ven Lim ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Electron Beam ◽  
Polyvinyl Alcohol ◽  
Young’S Modulus ◽  
Electron Beam Irradiation ◽  
Composite System ◽  
Young's Modulus ◽  
Beam Irradiation ◽  
Crosslinked Networks ◽  
Adhesion Effect

This work was conducted to investigate the effect of carbon nanotube (CNT) on the mechanical-physico properties of the electron beam irradiated polyvinyl alcohol (PVOH) blends. The increasing of CNT amount up to 1.5 part per hundred resin (phr) has gradually improved tensile strength and Young’s modulus of PVOH/CNT nanocomposites due to effective interlocking effect of CNT particles in PVOH matrix, as evident in SEM observation. However, further increments of CNT, amounting up to 2 phr, has significantly decreased the tensile strength and Young’s modulus of PVOH/CNT nanocomposits due to the CNT agglomeration at higher loading level. Irradiation was found to effectively improve the tensile strength of PVOH/CNT nanocomposites by inducing the interfacial adhesion effect between CNT particles and PVOH matrix. This was further verified by the decrement values of d-spacing of the deflection peak. The increasing of CNT amounts from 0.5 phr to 1 phr has marginally induced the wavenumber of O–H stretching, which indicates the weakening of hydrogen bonding in PVOH matrix. However, further increase in CNT amounts up to 2 phr was observed to reduce the wavenumber of O–H stretching due to poor interaction effect between CNT and PVOH matrix. Electron beam irradiation was found to induce the melting temperature of all PVOH/CNT nanocomposite by inducing the crosslinked networks.

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