Flame-retarded mechanism of SEBS/PPO composites modified with mica and resorcinol bis(diphenyl phosphate)
作者： Zhijie Jiang , Shumei Liu , Jianqing Zhao , Xiaobin Chen
DOI: 10.1016/J.POLYMDEGRADSTAB.2013.10.013
关键词: Mica 、 Resorcinol 、 Materials science 、 Styrene 、 Polymer 、 Cone calorimeter 、 Ethylene 、 Limiting oxygen index 、 Maleic anhydride 、 Composite material
摘要: Abstract The flame retardancy of styrene- b -ethylene/butylene- -styrene triblock polymer (SEBS)/poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) blends was greatly improved by the combined use mica and resorcinol bis(diphenyl phosphate) (RDP). limiting oxygen index (LOI), vertical burning cone calorimeter test were performed to evaluate flame-retarded effect. composite SEBS/PPO/maleic anhydride grafted SEBS (SEBS- g -MAH) with a mass ratio 11/11/3 passed V-0 rating in UL94 addition 10–15 wt% 15–10 wt% RDP total amount 25 wt%. synergism confirmed mathematical evaluation synergistic effect (SE) LOI, residue, peak heat release rate (PHRR) evolved (THE) per loss (THE/ML). mechanism also proposed on results test, TGA-FTIR, SEM micrographs SEM/EDS analysis residues. It found that degradation SEBS/PPO/SEBS- -MAH matrix slowed down, more consolidated char layer higher residue promoted combination mica. flame-retardancy through gas condensed phase action.
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