2015 Volume 56 Issue 4 Pages 529-533
Effects of homogeneous low voltage electron beam irradiation (HLEBI) without glue on the adhesive force of tensile shear strength (τB) at each shear probability (Ps) of laminated PDMS/PTFE sheets of polydimethylsiloxane (PDMS) and Polytetrafluoroethylene (PTFE) were investigated. Although τB of shear at low and mid Ps of 0.06 and 0.50 were 0.015 and 0.04 MPa before treatment, 0.22 MGy-HLEBI enhanced the τB up to the largest values of 0.098 and 0.11 MPa of the laminated sheets, respectively. They were more than 6 and 3 times larger than those before treatment. On the other hand, additional HLEBI apparently reduced the τB of laminated sheets irradiated at more than 0.43 MGy as usual radiation damages. The effects of HLEBI on adhesion force of τB can be explained by the enhancement of cross-linking at PDMS/PTFE interface. When HLEBI cut the chemical bonds and generated active terminated atoms with dangling bonds at cross-linked PDMS and PTFE polymers, strengthening the bonding force of cross-linking polymers was induced by the chemical bonding and intermolecular attractive force.
