[2] Polymerized Near-Infrared Fluorescent Dye with Enhanced Photostability (IMAGE)
Caption
▲ The additive incorporated into the film used for interfacial bonding has a chemical structure similar to those of the polymer film and reinforcing fibers that constitute the composite. Compared with conventional additives, this multifunctional single-material-based additive has a low-molecular-weight, branched structure and provides the following benefits:
1) It controls the rheological properties of the film. Its low viscosity at elevated temperatures allows the molten film to readily penetrate the interstices of the reinforcing fibers. As a result, when the film and reinforcing fibers are stacked and hot-pressed, the additive enhances interfacial adhesion between the two materials.
2) Owing to its low molecular weight, the additive can interfere with the crystalline packing of the highly crystalline, eco-friendly polymer, thereby reducing polymer chain packing and crystallization.
3) The eco-friendly flame retardant has amphiphilic characteristics. The branched structure of the additive interacts with the hydrophobic portions of the flame retardant, helping it disperse uniformly within the eco-friendly polymer matrix. During subsequent recycling of the composite, the low-molecular-weight additive also facilitates the removal of the flame retardant during washing.
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Korea Research Institute of Chemical Technology(KRICT)
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