Influence of Electron Beam Irradiation on Impact Value of Acryl Resin

Abstract

Influence of electron beam (EB) irradiation on the impact value of Acryl resin was studied. EB irradiation of less than 10.8 kJ kg -1 (kGy) apparently increased the impact value. EB irradiation from 10.8 to 21.6 kJ kg -1 (kGy) decreased the impact value, although it was larger than that of the untreated sample. The impact value enhancement by EB irradiation was explained by increasing the bending strength.

Effects of Electron Beam Irradiation on Adhesive Force of Laminated Sheet of High Strength Polytetrafluoroethylene (PTFE) and Bio-Adaptable Polydimethylsiloxane (PDMS)

“…They were compressed under 0.080 MPa by nylon6 film with 15 µm. 15,16) When the compressive stress of more than 0.080 MPa was loaded for more than 1.0 h, a high reproducibility of peeling force was obtained.…”

“…The sample at the outer surface of the nylon film was homogeneously irradiated by an electron-curtain processor (Type CB175/15/180L, Energy Science Inc., Woburn, MA, Iwasaki Electric Group Co., Ltd., Tokyo). 6,12,13,15,16) The samples were homogeneously irradiated with an electron beam through a titanium window attached to a 24 cmdiameter vacuum chamber. A tungsten filament in a vacuum was used to generate the electron beam with an electric voltage of 0.17 MeV and an irradiating current of 2.0 mA.…”

“…Both stainless steel springs and 0.015 mm thick nylon6 supporting film, which loaded the compressive stress (0.080 MPa) at interface, reproducibly connected each polymer surface. 15,16) As shown in Fig. 2, samples were set on the stainless spring and urethane sheets.…”

Creation of Adhesive Force between Laminated Sheets of Polyurethane (PU) and Polytetrafluoruethylene (PTFE) by Homogeneous Low Energy Electron Beam Irradiation Prior to Hot-Press for Bio-Adaptable Application

“…To obtain high reproducibility of peeling strength results, compressive stress 16,17) of more than 80 kPa was loaded for more than 1.0 h. Since no peeling force was observed at the interface between the back surface of PU or PTFE layer and the nylon 6 supporting film and in the jig, it was easy to remove the supporting film after irradiation. The sample at the outer surface of the nylon film was homogeneously irradiated in the jig (Fig.…”

“…The peeling adhesive force (F p ) and its peeling distance (d p ) were obtained by the peeling test, which was performed by using a micro-load tensile tester (F-S Master-1K-2N, IMADA Co. Ltd., Japan) with a strain rate of 10 mm/min. 17) Since the unit of the F p is Nm ¹1 , the o F p is used instead of the adhesive strength, whose units should be Nm ¹2 . The sample condition of tensile test is as follows.…”