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By Teresa McPherson

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Com soldering behavior with excellent adhesion to silicon wafers and have demonstrated field-proven module performance. com HUNTSMAN ADVANCED MATERIALS REACH-Compliant Adhesives Three high-performance REACH-compliant epoxy adhesives are now available for use by aerospace manufacturers and component suppliers for fabrication, assembly, and repair. The products reportedly comply with federal regulations and are qualified to OEM specifications governing the performance properties of materials used to build and maintain commercial and corporate/private aircraft, as well as helicopters.

The chemical modification of lactide can be achieved by choosing an appropriate initiator for the ring-opening polymerization (ROP). 10 Higher biomass incorporation was not possible in this case due to the immiscibility of macromonomers with higher molar mass. ,10 acrylated PLA macromonomers (MMs) were prepared with the aim of developing biorenewable PSA polymers by copolymerization of biomass MMs with suitable acrylic monomers (see Figure 1). The addition of a few repeat units of lactic acid in the MM (from 6-12 repeat units) caused a significant increase in the glass-transition temperature (Tg) and a change from a viscous liquid to a waxy solid for 12 repeat units.

The shear adhesion results were affected somewhat by changes in MM composition. An increased crosslink density and the addition of tacki- fier dispersion had the greatest impact on the shear. For low amounts of tackifying dispersion (< 10 wt%), an increased loop tack was found, as well as a slight decrease in shear. For higher amounts of tackifying dispersions (30 wt%), loop tack values decreased but shear sharply increased (see Table 3). A decrease in shear is typically observed on the addition of tackifying resin.

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