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Issue 22, 2015
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Copolymers based on telechelic benzoxazine with a reactive main-chain and anhydride: monomer and polymer synthesis, and thermal and mechanical properties of carbon fiber composites

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Abstract

Enhanced thermomechanical properties of polybenzoxazine based on allylamine-terminated oligomeric benzoxazine (Allyl-oligomer) are obtained by copolymerizing the oligomer with maleic anhydride (MA) in the presence of a free radical initiator. MA is introduced to react with the oxazine ring and allyl groups via different mechanisms. From 10% to 30% of MA are added into benzoxazine systems to explore the optimum copolymerization ratio. The polymerization behavior, glass transition temperature (Tg) and thermal stability of the corresponding polymers are investigated by differential scanning calorimetry (DSC), in situ Fourier transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). Addition of 10% MA is found to give the highest thermal stability, while maintaining the highest Tg of the polymer matrix. Using the resulting high performance polymer, carbon fiber composites are prepared and studied. The mechanical properties are evaluated by ASTM tensile and flexural tests. The tensile strength, tensile modulus, and flexural modulus of the composites exceed those of benchmark products with epoxy matrices.

Graphical abstract: Copolymers based on telechelic benzoxazine with a reactive main-chain and anhydride: monomer and polymer synthesis, and thermal and mechanical properties of carbon fiber composites

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Publication details

The article was received on 15 Oct 2014, accepted on 20 Jan 2015 and first published on 22 Jan 2015


Article type: Paper
DOI: 10.1039/C4RA12086H
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Citation: RSC Adv., 2015,5, 16785-16791

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    Copolymers based on telechelic benzoxazine with a reactive main-chain and anhydride: monomer and polymer synthesis, and thermal and mechanical properties of carbon fiber composites

    J. Liu, C. Scott, S. Winroth, J. Maia and H. Ishida, RSC Adv., 2015, 5, 16785
    DOI: 10.1039/C4RA12086H

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