ESR studies on laser beam irradiated polyethyleneterephtalate

Romero, J. Reyes; Chipara, Mircea; Georgescu, L.; Constantinescu, L.; Secu, C.E.; Morosanu, C.

doi:10.1016/s0168-583x(03)01179-0

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The distribution of free radical concentration was detected by the electron spin resonance (ESP-500 type, BRUKER) [39], which explored the lifetime of free radicals and further explained the benefits of the argon plasma modification on the membrane surface. Since the free radicals quickly died out when leaving the reaction chamber system, we used the trapping reagent of natural wool to combine with free radicals of the reaction chamber in our study, generating a new long-lived free radical for measurement [40].…”

Section: Methodsmentioning

confidence: 99%

Study on the modified effect of polyvinylidene fluoride membrane by remote argon plasma

Zhang

et al. 2021

Surface Engineering

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The concentration distribution of electrons and free radicals in remote argon plasma were studied by using a langmuir probe and electron spin resonance. The polyvinylidene fluoride (PVDF) membranes were modified by remote argon plasma, analyzing the hydrophilic properties and antifouling of modified membranes surface. Furthermore, the membranes were characterized for their morphologies and chemical compositions by using scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. The experimental results showed that the optimal region was 40 cm away from the discharge center. In the optimal condition of modification (RF power of 90 W, treatment time of 90 s and pressure of 20 Pa), the water contact angle of the PVDF membrane was reduced from 95.63 °to 62.19 °. Simultaneously, the membrane has good water flux at about 151.98 L•(m2•h)-1, the maximum rejection rate and the minimum fouling rate were 90.0% and 34.70%, respectively.

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Section: Methodsmentioning

confidence: 99%

Study on the modified effect of polyvinylidene fluoride membrane by remote argon plasma

Zhang

et al. 2021

Surface Engineering

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“…Polymers exposed to ionizing radiation, even at low doses, often undergo structural changes accompanied by molecular crosslinking, grafting and chain scission reactions. 9–11 Using ionizing radiation represents an economic advantage, because it reduces the use of additives in the formulas. With suitable doses, it is the only technique that uses electromagnetic energy to generate significant changes.…”

Section: Introductionmentioning

confidence: 99%

Physical changes associated with gamma doses on wood/polypropylene composites

Ndiaye

Badji

Tidjani

2013

Journal of Composite Materials

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The effect of gamma radiation on the morphology, thermal behavior and mechanical properties of wood polypropylene composites has been investigated. Simultaneous thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) have been performed on wood polymer composite (WPC) samples of 9.5 ± 0.1 mg. These samples were exposed to different gamma dose in the range 10–100 kGy. The results indicated that gamma radiation improves the mechanical properties while the thermal stability is decreased. With gamma radiation, the scanning electron microscopy (SEM) of the micrographs became smoother and we can notice an improvement of interaction between polymer and wood fibers.

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