scholarly journals Dielectric, Thermal and Water Absorption Properties of Some EPDM/Flax Fiber Composites

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2555
Author(s):  
Anton Airinei ◽  
Mihai Asandulesa ◽  
Maria Daniela Stelescu ◽  
Niţǎ Tudorachi ◽  
Nicusor Fifere ◽  
...  
Keyword(s):  
Water Uptake ◽  
Electron Beam Irradiation ◽  
Degradation Products ◽  
Fiber Composites ◽  
Flax Fiber ◽  
Relaxation Processes ◽  
Ethylene Propylene Diene Monomer ◽  
Beam Irradiation ◽  
Absorption Properties ◽  
Different Doses

This paper deals with the dielectric and sorption properties of some flax fiber-reinforced ethylene-propylene-diene monomer (EPDM) composites containing different fiber loadings as well as their behavior after exposure to different doses of electron beam irradiation. Three relaxation processes were evinced, a weak relaxation β at sub-Tg temperatures and two α-type relaxations above the Tg. The EPDM/flax composites exhibited higher values of dielectric constant, dielectric loss and conductivity as compared to a pristine EPDM sample. Using thermogravimetric analysis (TG) coupled with Fourier transform infrared spectroscopy (FTIR) and mass spectrometry (MS) (TG/FTIR/MS system), the degradation products can be identified. The water uptake increased as the flax fiber level increased in composites. The water uptake tests of irradiated composites showed that the highest water content was obtained for a flax fiber level of 20 phr.

Exploring the effect of electron beam irradiation on the properties of some EPDM-flax fiber composites

2017 ◽  
Vol 40 (1) ◽  
pp. 315-327 ◽  
Author(s):  
Maria Daniela Stelescu ◽  
Anton Airinei ◽  
Elena Manaila ◽  
Nicusor Fifere ◽  
Gabriela Craciun ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Fiber Composites ◽  
Flax Fiber ◽  
Beam Irradiation

LC-MS-(MS) determination of oxidative degradation products of nonylphenol ethoxylates, carboxylates and nonylphenols in water

2004 ◽  
Vol 50 (5) ◽  
pp. 227-234 ◽  
Author(s):  
M. Petrovic ◽  
P. Gehringer ◽  
H. Eschweiler ◽  
D. Barceló
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Limit Of Detection ◽  
Degradation Products ◽  
Oxidative Degradation ◽  
Nonylphenol Ethoxylates ◽  
Beam Irradiation ◽  
Treatment Processes ◽  
By Products

A commercial blend of nonylphenol ethoxylates (NPEOs) was chosen as representative for non-ionic polyethoxylated surfactants to study the oxidative degradation of this class of surfactants in water using ozonation as well as electron beam irradiation with and without the addition of ozone as treatment processes. The electron beam irradiation processes applied represent so-called Advanced Oxidation Processes (AOPs); the combined ozone/electron beam irradiation is, moreover, the most powerful AOP which can be applied in aqueous systems. It was found that both ozonation and the two AOPs applied were able to decompose not only the NPEOs but also the polyethyleneglycoles (PEGs) formed as by-products from NPEO degradation to residual concentrations below the limit of detection. Moreover, the treatment processes were also used to study the oxidative degradation of nonylphenoxy acetic acid (NPEC) and of nonylphenol (NP) which are formed as by-products from biodegradation of NPEOs.

scholarly journals Radiation Processing and Characterization of Some Ethylene-propylene-diene Terpolymer/Butyl (Halobutyl) Rubber/Nanosilica Composites

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2431
Author(s):  
Elena Manaila ◽  
Anton Airinei ◽  
Maria Daniela Stelescu ◽  
Maria Sonmez ◽  
Laurentia Alexandrescu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Water Uptake ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Rubber Matrix ◽  
Scanning Electron Microscopy Data ◽  
Beam Irradiation ◽  
Ethylene Propylene ◽  
Ethylene Propylene Diene Terpolymer

Composites based on ethylene–propylene–diene terpolymer (EPDM), butyl/halobutyl rubber and nanosilica were prepared by melt mixing and subjected to different doses of electron beam irradiation. The effect of irradiation dose on the mechanical properties, morphology, glass transition temperature, thermal stability and water uptake was investigated. The efficiency of the crosslinking by electron beam irradiation was analyzed by Charlesby–Pinner parameter evaluation and crosslink density measurements. The scanning electron microscopy data showed a good dispersion of nanosilica in the rubber matrix. An improvement in hardness and 100% modulus was revealed by increasing irradiation dose up to 150 kGy. The interaction between polymer matrix and nanosilica was analyzed using the Kraus equation. Additionally, these results indicated that the mechanical properties, surface characteristics, and water uptake were dependent on crosslink characteristics.

Emergence of cold plasma and electron beam irradiation as novel technologies to counter mycotoxins in food products

2020 ◽  
pp. 1-10
Author(s):  
X. Mohammadi ◽  
G. Matinfar ◽  
A. Mousavi Khaneghah ◽  
A. Singh ◽  
A. Pratap-Singh
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Degradation Products ◽  
Atmospheric Plasma ◽  
Beam Irradiation ◽  
Plant Materials ◽  
Cold Atmospheric Plasma ◽  
Novel Technologies ◽  
The World ◽  
Activity Mechanism

Today, mycotoxins are considered a serious risk for human health and the economy around the world. Hence, dealing with them in such a way as to minimise damage to food and plant materials has become an important issue. Cold atmospheric plasma and electron beam irradiation are updated and non-thermal technologies, which are recently used in detoxification of mycotoxins. Both of these technologies have several unique features that turn them into efficient methods for degrading mycotoxins. Therefore, the main purpose of the present study is exhibiting the detoxification power of these methods and parameters affecting their activity. Besides, their advantages, generating systems, activity mechanism, and the toxicity of degradation products are also reviewed.

scholarly journals Effect of electron beam irradiation on mechanical properties of gelatin/Brazil nut shell fiber composites

2010 ◽  
Vol 15 (2) ◽  
pp. 380-385 ◽  
Author(s):  
Patrícia Y. Inamura ◽  
Kleber Shimazaki ◽  
Maria Aparecida Colombo ◽  
Ricardo de Rosa ◽  
Esperidiana Augusta Barretos de Moura ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Fiber Composites ◽  
Brazil Nut ◽  
Beam Irradiation
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