The science of adhesion: Part 1 Surface and interfacial aspects

The previous paper, Part 1, reviewed surface and interfacial phenomena, including mechanisms of adhesion. The present paper, Part 2, reviews the mechanics and mechanisms of failure of adhesive joints and the effects of various operating environments on joint performance.

/pdf/the-science-of-adhesion-wb3c6apqdo.pdf

The science of adhesion

Detailed crazing behavior in several plastic/rubber twophase polymer systems was studied by means of direct observation of ultrathin sections under the electron microscope by employing osmium tetroxide staining and hardening procedure. Samples used are ABS polymer, high -impact polystyrene and several PVC/rubber blends. All of the systems investigated showed evidence of stress -crazing when under flexural stress. Relationships between the dispersed rubber particles and the crazing behaviors were studied, and the role of rubber particles in the toughening mechanism of plastics was discussed based on these observations.

Fine structures and fracture processes in plastic/rubber two -phase polymer systems. I. Observation of fine structures under the electron microscope

Surface conditioning of ABS for metallization without the use of chromium baths

The authors focus on the Fused Deposition Modeling (FDM) 3D printer because the FDM 3D printer can print the utility resin material. It can print with low cost and therefore it is the most suitable for home 3D printer. The FDM 3D printer has the problem that it produces layer grooves on the surface of the 3D printed structure. Therefore the authors developed the 3D-Chemical Melting Finishing (3D-CMF) for removing layer grooves. In this method, a pen-style device is filled with a chemical able to dissolve the materials used for building 3D printed structures. By controlling the behavior of this pen-style device, the convex parts of layer grooves on the surface of the 3D printed structure are dissolved, which, in turn, fills the concave parts. In this study it proves the superiority of the 3D-CMF than conventional processing for the 3D printed structure. It proves utilizing the evaluation of the safety, selectively and stability. It confirms the improving of the 3D-CMF and it is confirmed utilizing the data of the surface roughness precision and the observation of the internal state and the evaluation of the mechanical characteristics.

/pdf/development-of-the-improving-process-for-the-3d-printed-2320py8adw.pdf

Koichi Kato

Papers

ABS mouldings for electroplating—An electron microscope study