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TiO2 on the MPP / PEPA performance of flame-retardant PP

Figure 1 TGA of the TGA curves of flame-retardant PP. Table 3 is based on data obtained from TGA curve. Figure 1 shows that only a weight loss of pure PP area; and flame retardant materials are there after the weight loss of 2 areas, the first weight loss area is the decomposition of flame retardants, and the second weight loss is mostly PP, decomposition. Figure 1 and Table 3 shows that: 1) Add after the flame retardant, PP decomposition temperature sensitive and so are Ming Xian Feng before. TiOz on the MPP / PEPA performance of flame retardant PP in advance, is due to the decomposition of flame retardants in advance; 2) after adding TiO, PP weight loss slightly delayed,[link widoczny dla zalogowanych], indicating that TiO. Did not catalyze the decomposition of flame retardant; 3) Add TiO. , The residual rate increased to 10.4, indicating that the addition of flame retardants TiO played a catalytic esterification role in promoting the role and stability of PP into a carbon char l_4. Temperature / �� Figure 1 TGA curves of flame retardant PP in Table 3 of the TGA results of flame-retardant PP Note: 1 as the material temperature of weight loss 1, T5 5 weight loss for the material temperature, Tsog 5O for the material when the temperature of weight loss for all the largest weight loss speed weight loss temperature, wsoo at 600 �� the residual rate. 2.4 residues of SEM morphology of samples to UL test SEM residues were tested as shown in Figure 2 (ie, the sample in Table 2, 400 times magnification). Figure 2 shows the sample without adding TiO formed after combustion of the carbon hole is uniform, small diameter; and add Tio, the carbon layer in the larvae L smaller hole, hole wall thickening, the surface also formed a more thick carbon layer, indicating that adding TiO. After the formation of beneficial high-strength carbon burning film,[link widoczny dla zalogowanych], and stability under high pressure gases generated by the expansion of the �� lr]. This carbon layer can improve the insulation layer of carbon and oxygen capacity, and enhance the protective effect of carbon layer,[link widoczny dla zalogowanych], thus improving the flame retardant PP. ; (A) ~ Ti02 (b) adding 1% Ti02 material residues in Figure 2 SEM photographs 3 Conclusion a) in the MPP / PEPA flame retardant PP, add a small amount of TiO can significantly improve the flame retardant PP. When the MPP, PEPA,[link widoczny dla zalogowanych], and the addition of the mass fraction of TiO 12.8%, and 1, PP of L0 to 31.5, the vertical burning level to V-O. b) TGA results showed that the flame retardant system add Ti0. Of flame retardant (MPP / PEPA) has the role of catalytic esterification, is conducive to flame retardant system generates more carbon residue to form a stable char layer, the slower the degradation rate of PP. C) SEM analysis showed that, Tio. Was helpful to the formation of high strength carbon layer, insulating layer of carbon and oxygen increase the capacity and improve the flame retardant PP.
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