Construction of a copper hydroxystannate functionalized graphene oxide for rigid polyvinyl chloride foam toward improved fire safety

Abstract A copper hydroxystannate (CHS) functionalized graphene oxide (GO) (CHS@GO) was feasibly prepared through an in‐situ method, and well characterized by TEM, XRD, FTIR XPS. Rigid poly vinyl chloride (RPVC) foams containing CHS@GO were utilizing methyl hexahydrophthalic anhydride isocyanate as coupling agents, azodiisobutyronitrile azodicarbonamide blowing agents. The fire safety, mechanical properties thermal decomposition behavior of the RPVC studied. foam 2 wt% (RPVC/2CHS@GO) achieved a limiting oxygen index (LOI) 35.5% V0 rating in UL‐94 tests. cone calorimetric tests (CCT) results demonstrated peak heat release rate (pHRR) total (THR) RPVC/2CHS@GO reduced 40.6% 36.8%, respectively, compared with those pure (pure RPVC). compressive strength flexural increased 47.3% 34.6%, contrast Pure RPVC. thermogravimetry showed that endowed improved char residue.