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The Effects of Continuous Reactive Blending on Benzoxazine/Polyethylene

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The Effects of Continuous Reactive Blending on Benzoxazine/Polyethylene Glycol Blends


Benzoxazine (BOX) networks are high modulus thermosets, which are touted as replacements for phenolic matrices in aircraft interior composites, but realization of potential benzoxazine application is currently limited by the brittle nature of the cured network. A common toughness improvement method is through manufacturing blends of thermosets with ductile thermoplastic materials such as polyethylene glycol (PEG).  However, previous research has shown poor compatibility of PEG with benzoxazine when formulated using traditional batch blending methods. This research explored the use of reactive extrusion as a method for improving blend compatibility and enhancing tensile properties of benzoxazine networks. The effects of blending method on miscibility were quantified using DSC, FTIR, and SEM.  Results indicate PEG miscibility is increased by reactive blending, likely due to reaction between the PEG and benzoxazine network hydroxyls during extrusion.


Author: Gabe Hill


Conference: SAMPE Seattle 2017


SKU/Code: SE17--0764

Pages: 11

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