Fiber reinforced plastics (FRP) are used for lightweight structures in aerospace and automotive industry. Structural parts typically are made of thermosets like epoxy, phenolic or bismaleimide resins. Polybenzoxazines gain more and more interest in polymer research due to their outstanding characteristics such as excellent mechanical properties, good flame resistance and a polymerization pathway without the need of initiators and near zero shrinkage. Moreover, benzoxazines chemistry offers several opportunities to intervene and regulate the polymerization sequence and materials properties.<br/>With the aim to establish benzoxazines as matrix system in FRPs our research utilizes benzoxazine chemistry to accomplish both the adjustment of benzoxazine polymerization behavior and the addition of smart characteristics or functionalities. This contribution deals with thermo-responsive fibre reinforced polybenzoxazines as one example of functional materials. That was accomplished by non-covalent and covalent incorporation of partially crystalline oligomers into benzoxazines network via ring opening polymerization without the need of initiators. Materials morphology is controlled by the polymer composition and the nature of binding into the polymeric network. This is affecting the thermomechanical properties of both the neat and fiber reinforced polybenzoxazines enabling plastic deformation of the materials at elevated temperatures.<br/>Polybenzoxazines with adjustable properties will provide access to FRPs with a huge potential for applications in aerospace and other industry sectors.

Fiber reinforced polybenzoxazine: From benzoxazine chemistry to lightweight materials

255th National Meeting (2018)

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