The strength of polymer materials' adhesive joints, applied in the automotive industry

Abstract

The article describes the shear strength and statistical analysis of adhesive joints of four polymers used in the automotive industry, i.e. polypropylene, polystyrene, polyamide and polyacetal. Adhesive joints were prepared using two types of epoxy adhesive: Epidian 57/1DAl1 00:50 and Epidian 6ITFF/100:27. Surfaces of bonded materials prior to the bonding process were prepared using sandpaper P120, and then to remove impurities formed after mechanical treatment, the surface of polymer materials was degreased with acetone. The adhesive joints after the curing process were subjected to a strength test on the Zwick/ Roell 150 strength machine in accordance with the PN-EN 1465 standard. The STATISTICA program was used for statistical analysis of the results of the strength tests. Parameters of descriptive statistics were determined, normality of distribution was determined and statistical tests of strength parameters were carried out. It was noted, among other things, that the greatest shear strength was obtained by adhesive joints of HIPS 425N polystyrene bonded Epidian 6/1DAl100:50 epoxy adhesive. However, the smallest shear strength was characterized by the adhesive joints made of Tarnamid T-27 polyamide bonded with Epidian 61 TFF/1 00:27 adhesive, which amounted to about 30 of the highest strength value obtained.

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