Figures 4-17, 18 and 4-19, 20 are the results of thermal weight loss (TG) and differential thermal analysis (DTA) of melamine cyanurate fire retardant nylon 66/6 and fire retardant nylon 6, respectively.
Referring to the last article tables 4-17, 4-18,4-19, 4-20, from the above TG test results, it can be seen that the initial decomposition temperature of melamine cyanurate fire retardant nylon 66/6 and nylon 6 is about 50 ° C lower than that of pure nylon, and also lower than the initial thermal weight loss temperature of MCA. The surface MCA reduces the heat of nylon. stability. MCA fire retardant nylon 66/6 and nylon 6 both have a sharp weight loss process at about 350 ℃, which is different from pure nylon.
It is completely different, so it cannot be a physical process of sublimation weightlessness of MCA. This kind of rapid weightlessness may be a chemical process of catalytic decomposition caused by the interaction between melamine cyanurate and nylon.
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