HB Polymers as Adhesion Promoters

Five different HB PAMAMs were included in the study 

In some cases a silane (A-187 Union Carbide) was applied to the A1 adherends as a coupling agent for better chemical bonding. Single lap shear (SLS) joints were primed with all four PAMAMs, bonded with epoxy or PU adhesives, and tested in shear according to ASTM D-1002 at a loading speed of 2 mmmin .  

Scanning electron microscopy (SEM) was used to investigate the morphology of the primed adherends and the fracture surfaces of the bonded joints. 

The durability of joints with adherends treated with optimum concentrations of the HB polymer primer and bonded with epoxy or PU adhesives was tested on wedge joints (ASTM D-3762) with aging conditions of 50°C/95% RH, for 1, 

The interfacial adhesion effect of the HB PAMAMs on fibers in epoxy composite systems was investigated with laminates prepared by compression molding. 

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