PPC-based Reactive Hot Melt Polyurethane Adhesive(RHMPA)——Efficient Glues for Multiple Types of Substrates

Tens of billion metric tons of anthropogenic CO2 discharged from the burning of fossil fuels lead to an enormous environmental and resource burden. It is charming to transform CO2 to desirable, economical chemicals and materials. Poly（propylene carbonate）（PPC） is an emerging CO2-based material. Herein, we report the design, synthesis and characterization of the reactive hot melt polyurethane adhesive（RHMPA） based on PPC polyol. The resultant RHMPAs exhibit good adhesion properties to multiple substrates including plastics（PC, PMMA, ABS） and metals（aluminium, steel）, which is comparable to or even better than conventional RHMPAs prepared from petro-based polyol. Furthermore, the PPC-based RHMPAs have tunable mechanical properties, and are thermally stable in the typical working range of bonding process（up to 270 °C）. The study is expected to expand the applications of PPC and provide a new type of CO2-based renewable and eco-friendly materials.