Effect of Ionizing Beta Radiation on the Strength of Bonded Joints of Polycarbonate

Bednarik, Martin; Maňas, David; Staněk, Michal; Navrátil, Jan; Mizera, Aleš

doi:10.4028/www.scientific.net/amr.1025-1026.251

Cited by 2 publications

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References 9 publications

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“…This study focused on the influence of irradiation on the properties of surface layers, such as the wetting contact angle, free surface energy, and adhesiveness, of selected types of polyolefin polymeric materials, and built on the work of Bednarik et al [33,34,35,36,37]. The main goal of this study was, therefore, to provide a comprehensive overview of the influence of irradiation on the surface properties of selected nonpolar polymeric materials, as well as on the relationship between the ultimate tensile strength of bonded joints and absorbed dose of radiation when using commercially available types of adhesives.…”

Section: Introductionmentioning

confidence: 99%

Effect of Beta Radiation on the Quality of the Bonded Joint for Difficult to Bond Polyolefins

et al. 2019

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Bonding is increasingly being used, and it is an ever-evolving method for creating unbreakable bonds. The strength of adhesive bonds determines, to a significant extent, the possible applications of this technology and is influenced by many factors. In addition to the type of adhesive used, the characteristics of the surface layers play a significant role; therefore, significant attention is paid to their adjustment and modification. Radiation crosslinking is one of the most important methods for modifying polymer properties. Currently, the most frequently used type of radiation for polymer crosslinking is beta minus (β−) radiation, which affects not only mechanical but also surface properties, chemical and temperature resistance, and surface layer characteristics of polymers. This study investigated the effect of β− radiation on the surface layer properties of low-density polyethylene (LDPE), high-density polyethylene (HDPE), and polypropylene (PP) and the effects of surface-layer modification on the ultimate tensile strength of bonded joints. Based on the results, we concluded that β− radiation significantly changes the properties of the tested surface layers, increases the surface energy, and improves the adhesiveness of bonds. Consequently, the final strength of the LDPE, HDPE, and PP bonds increases significantly.

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Section: Introductionmentioning

confidence: 99%

Effect of Beta Radiation on the Quality of the Bonded Joint for Difficult to Bond Polyolefins

et al. 2019

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“…In addition to the research papers dealing with the positive effect of radiation cross-linking on mechanical properties, temperature stability, and chemical resistance [26][27][28], studies were conducted in the area of radiation cross-linking effect on the polymers' surface layer properties. This problem was investigated extensively in our previous publications [8,[29][30][31], which covered the research of non-polar polymers' surface layer properties modified by electron radiation. It was proved that this kind of modification has a positive influence on the overall load capacity of the adhesive bond between the materials with lower adhesiveness.…”

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Influence of the β− Radiation/Cold Atmospheric-Pressure Plasma Surface Modification on the Adhesive Bonding of Polyolefins

et al. 2020

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The goal of this research was to examine the effect of two surface modification methods, i.e., radiation cross-linking and plasma treatment, on the adhesive properties and the final quality of adhesive bonds of polypropylene (PP), which was chosen as the representative of the polyolefin group. Polymer cross-linking was induced by beta (accelerated electrons—β−) radiation in the following dosages: 33, 66, and 99 kGy. In order to determine the usability of β− radiation for these applications (improving the adhesive properties and adhesiveness of surface layers), the obtained results were compared with values measured on surfaces treated by cold atmospheric-pressure plasma with outputs 2.4, 4, and 8 W. The effects of both methods were compared by several parameters, namely wetting contact angles, free surface energy, and overall strength of adhesive bonds. Furthermore, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) were conducted. According to our findings the following conclusion was reached; both tested surface modification methods significantly altered the properties of the specimen’s surface layer, which led to improved wetting, free surface energy, and bond adhesion. Following the β− radiation, the free surface energy of PP rose by 80%, while the strength of the bond grew in some cases by 290% in comparison with the non-treated surface. These results show that when compared with cold plasma treatment the beta radiation appears to be an effective tool capable of improving the adhesive properties and adhesiveness of PP surface layers.

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Effect of Ionizing Beta Radiation on the Strength of Bonded Joints of Polycarbonate

Cited by 2 publications

References 9 publications

Effect of Beta Radiation on the Quality of the Bonded Joint for Difficult to Bond Polyolefins

Effect of Beta Radiation on the Quality of the Bonded Joint for Difficult to Bond Polyolefins

Influence of the β− Radiation/Cold Atmospheric-Pressure Plasma Surface Modification on the Adhesive Bonding of Polyolefins

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