Enhanced mechanical properties of APP flame-retardant epoxy resin by phosphorus-modified graphene oxide

ABSTRACT

The phosphorous acid (H₃PO₂) was used as reducing agent to prepare phosphorus modified graphene oxide (P-FGO) was added into the EP/APP. The thermal stability, flame resistance, morphology of the residue char layer and impact fracture, and mechanical properties of the composites materials were investigated with TGA LOI, UL-94, SEM, TEM, impact and tensile test. The results show that the filling of P-FGO can improve the mechanical properties of EP composites. When the P-FGO content of the EP composites system was 0.3 wt%, the initia weight loss temperature was 311.7°C and the char yield was 19% at 600°C, the tensile strength was 49.3 MPa, impact strength was 9.5 kJ/m², improve 24.8% and 50.8%, respectively, compare with APP flame retardant EP. LOI was 28.9, and the UL-94 passed V-0 level. The P-FGO had a good performance to enhance APP flame retardant EP.

KEYWORDS:

• Modified
• phosphorous acid
• flame retardant
• mechanical properties
• epoxy resin

Disclosure statement

No potential conflict of interest was reported by the authors.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.