Synthesis of Polybenzoxazine as an environmentally friendly adhesive material from cardanol and post-consumer PET source

Xuan Viet Cao; Viet Chat Luong; Khanh Tuong Huynh; Uy Lan Du Ngoc

doi:10.15625/2525-2518/18526

Author affiliations

Authors

Xuan Viet Cao Department of Polymer Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology https://orcid.org/0000-0002-2104-442X
Viet Chat Luong Department of Polymer Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 286 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 70000, Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc Dist., Ho Chi Minh City 70000, Vietnam https://orcid.org/0009-0006-8558-881X
Khanh Tuong Huynh Department of Polymer Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 286 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 70000, Vietnam, Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc Dist., Ho Chi Minh City 70000, Vietnam https://orcid.org/0009-0009-4491-2718
Uy Lan Du Ngoc San Jacinto College - South Campus Chemistry

DOI:

https://doi.org/10.15625/2525-2518/18526

Keywords:

Cardanol, benzoxazine, post-consumer Polyethylene terephthalate, adhesive

Abstract

In this study, a thermosetting benzoxazine was successfully prepared from environmentally friendly sources to be used as an adhesive. The phenolic component used for the synthesis of the benzoxazine monomer is cardanol derived from the cashew nutshell, while the amine fractions are terephthalamide, which is a product of the amination process of used polyethylene terephthalate plastic bottles (PET). The structure of the benzoxazine monomer was determined by FT-IR and ¹H-NMR spectroscopy. The thermal and curing behavior of the materials was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). A lap-shear adhesion testing (ASTM D1002-10) was performed to measure the bond strength of the material to the CT3 steel surface. The adhesive properties with a shear strength of 7.29 MPa are excellent compared to other commercial adhesives. This result indicates the great potential of this benzoxazine for adhesive applications in practice.

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