Effects of Electron Beam Irradiation on Peeling Resistance of Laminated Sheet of High Strength Polypropylene (PP) and Bio-Adaptable Polydimethylsiloxane (PDMS)

Nishi, Yoshitake; Kawazu, Hidenori; Takei, Hiroaki; Iwata, K.; Kudoh, Hiroyuki; Mitsubayashi, Kohji

doi:10.2320/matertrans.m2011129

Cited by 15 publications

(16 citation statements)

References 10 publications

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“…ESR signals of the GFRP and matrix composite are similar in shape and magnetic field value, thus it is possible the dangling bonds observed are from the polyester styrenebutadiene polymer. The signal magnetic fields, B of 323.073 and 323.026 mT correspond closely to that of studies of Si-glass network (323.7 mT, g-factor = 2.001) 25) and close to EB-irradiated polypropylene (PP) film at 321322 mT, polydimethylsiloxane (PDMS) at 322.7 mT, 26) and novolak-type phenol resin at 322.8 mT. 21) Therefore, dangling bonds are detected in the polymer.…”

Section: Effect Of Hlebi At Each Fracture Probabilitymentioning

confidence: 89%

Effects of Electron Beam Irradiation on Charpy Impact Value of Short Glass Fiber (GFRP) Samples with Random Distribution of Solidification Texture Angles from Zero to 90 Degrees

2012

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Compression-molded short-fiber GFRP-BMC panels have random distribution of solidification texture angles from zero to 90 degrees in the center of the mother panels. Hence, there is significantly lower impact strength in the panel center than in the outside. However, experimental results showed homogeneous low voltage electron beam irradiation (HLEBI) applied to the center region apparently enhances the Charpy impact values (a uc ) 5 to 25%. Fracture mechanism was observed to convert at a uc > ³5.46.7 kJ·m ¹2 from clean to secondary microcrack proliferation and/or bends near the main crack, with increasing fracture surface area as a uc increased. SEM observation revealed 0.86 MGy HLEBI treated GFRP had much more polymer adhering to fibers than the untreated. This increased matrix adhesion can be explained by electron spin resonance (ESR) peaks indicating dangling bonds are generated creating repulsive forces between outer shell electrons in the polymer matrix, apparently exhibiting increased compressive stress on the fibers increasing adhesion force. Moreover, the lone pair electrons generated in the matrix may have bonded with the fibers more efficiently. For these reasons, increased fiber-matrix adhesion seen in the 0.86 MGy samples appears to assist for more internal cracking, increasing resilience to impact of the GFRP-BMC, raising the a uc .

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Section: Effect Of Hlebi At Each Fracture Probabilitymentioning

confidence: 89%

Effects of Electron Beam Irradiation on Charpy Impact Value of Short Glass Fiber (GFRP) Samples with Random Distribution of Solidification Texture Angles from Zero to 90 Degrees

2012

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“…7,10,19) The microwave frequency used in the ESR analysis was in the X-band at 9.45 « 0.05 GHz with a field modulation of 0.10 MHz. The microwave power was 1.0 mW.…”

Section: Electron Spin Resonance (Esr) and X-ray Photo-mentioning

confidence: 99%

Adhesive Resistance to Peeling Force of PTFE/PDMS Laminated Sheet Assisted by Homogeneous Low Voltage Electron Beam Irradiation at 77 K

et al. 2014

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¹1 at low P p (0.06) at 77 K, indicator of high industrial reliability of production process, was 0.33 MGy, which was more than 3.7 times broader than that at 298 K. Based on the 3-parameter Weibull equation, the lowest o F p value at P p of zero (F s ) could be estimated. The 0.22 MGy-HLEBI at 77 K apparently improves the F s , which was higher than that 0.22 MGy-HLEBI at 298 K. Decreasing the irradiation temperature from 298 to 77 K controlled the rapid adhesion and rapid decay of adhesion at low-P p , which were mainly caused by the low forming ability of dangling bonds induced by strong apparent bonding force, which is related to decreasing atoms vibration energy. Since the 0.22 MGy-HLEBI at 77 K controlled the recovery of dangling bonds and generated the chemical bonds, the strong adhesive force of PTFE/PDMS treated by 0.22 MGy-HLEBI at 77 K could be explained. Therefore, HLEBI under liquid nitrogen was useful tool for quick strong PTFE/PDMS lamination with sterilization for bio-adaptable application.

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“…HLEBI has been found to increase adhesive mechanical properties of polymer-polymer laminations for biomedical applications of PDMS (polydimethylsilozane)/PTFE (polytetra uoroethylene) 6) , PDMS/PP (polypropylene) 7) , and then create strong adhesion of PTFE/PE. 8) Improvements are mainly caused by the irradiation with the formation of dangling bonds at terminated atoms in polymers.…”

Section: Introductionmentioning

confidence: 99%

Adhesion of Polyethylene/Polyethylene Terephthalate (PE/PET) Laminated Sheets by Homogeneous Low Potential Electron Beam Irradiation (HLEBI) Prior to Assembly and Hot-Press above Melting Point

et al. 2017

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Effects of Electron Beam Irradiation on Peeling Resistance of Laminated Sheet of High Strength Polypropylene (PP) and Bio-Adaptable Polydimethylsiloxane (PDMS)

Cited by 15 publications

References 10 publications

Effects of Electron Beam Irradiation on Charpy Impact Value of Short Glass Fiber (GFRP) Samples with Random Distribution of Solidification Texture Angles from Zero to 90 Degrees

Effects of Electron Beam Irradiation on Charpy Impact Value of Short Glass Fiber (GFRP) Samples with Random Distribution of Solidification Texture Angles from Zero to 90 Degrees

Adhesive Resistance to Peeling Force of PTFE/PDMS Laminated Sheet Assisted by Homogeneous Low Voltage Electron Beam Irradiation at 77 K

Adhesion of Polyethylene/Polyethylene Terephthalate (PE/PET) Laminated Sheets by Homogeneous Low Potential Electron Beam Irradiation (HLEBI) Prior to Assembly and Hot-Press above Melting Point

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