FIGURE 3 Flame retardant tests of DABPPI and MMT-PI, both of which acted as fire shields to protect cotton.
Furthermore, to observe the flame retardancy of the composite more intuitively and comprehensively, and to explore its real application potential, MMT-PI was directly exposed to the flame of an alcohol lamp (600 oC~800 oC), and a fluffy cotton ball was placed above the composite (the cotton ball was about 2 cm away from MMT-PI, to check whether it will be ignited). Similarly, DABPPI was also tested as a fireproof board. Once DABPPI was exposed to flame, it would burn through after 33 s, then ignite the cotton ball. Differently, even if the MMT-PI was exposed to the flame for 180 s, it would not burn through, and the cotton ball would not catch fire (Fig. 3 ).
An infrared camera was used to record the above process (the recording time was 90 s), and the results were shown in Fig.4 (the DABPPI results were given in Fig. S4 in Supporting Information).