Halogen-free flame retardant epdm/pp thermoplastic elastomer material and its application
A thermoplastic elastomer and monomer technology, applied in the field of halogen-free flame-retardant EPDM/PP thermoplastic elastomer materials, can solve the problems of low tensile strength and excessive dosage, achieve high tensile strength, broad application prospects, good The effect of flame retardancy
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preparation example 1
[0102] Under nitrogen protection, add 0.76g of iodine, 0.85g of the compound represented by formula (2-2) and 20mL of dichloromethane into a 100mL three-necked flask, stir at 25°C for 0.5 hours, and dilute the obtained mixture with aluminum oxide Separation was carried out by column chromatography (the developing solvent was dichloromethane), and the obtained eluate was concentrated and washed with cyclohexane to obtain 1.31 g of a catalyst as a yellow solid. The obtained catalyst was subjected to H NMR spectroscopy ( 1 H-NMR) and carbon nuclear magnetic resonance ( 13 C-NMR) and X-ray single crystal diffraction analysis, confirmed that the obtained catalyst has a structure shown in formula (2-1).
[0103] 1 H-NMR(400MHz,DMSO)δ(ppm):1.35-2.06(m,33H),1.81(s,18H),2.62(m,4H),6.11(d,1H),7.38-7.50(m,5H ),7.59-7.67(m,3H).
[0104] 13 C-NMR (100MHz, DMSO) δ (ppm): 24.8, 25.5, 26.2, 26.3, 26.4, 26.6, 31.9, 32.1, 129.1, 129.2, 129.3, 129.5, 130.7, 134.2, 134.3, 193.0.
[0105] ...
Embodiment 1
[0108] Weigh 0.025 g of the catalyst with the structure shown in formula (2-1), and dissolve it in 12 mL of xylene solution to obtain catalyst solution C1, which is set aside.
[0109] With 5g EPDM rubber, 1g flame retardant monomer shown in formula (1) (wherein, R 11 , R 12 , R 13 , R 14 and R 15 Both H) in N 2 Under protection, dissolve in 70mL xylene solution until completely dissolved; then at 120°C, first add 2mL catalyst solution C1, after reacting for 10min, divide the remaining 10mL catalyst solution C1 evenly into 5 parts, and add one part every 10min The method is added to the reaction system, and after the last part of catalyst solution C1 is added to the reaction system for 10 minutes, the reaction is stopped, and the total reaction time is 60 minutes. After the reaction was completed, the reaction solution was filtered with a nickel mesh while it was hot, and acetone was added to the filtrate to remove impurities and precipitate. The precipitate was separate...
Embodiment 2
[0113] This example was carried out by a method similar to that of Example 1, except that in this example, 12 mL of catalyst solution C1 was added to the reaction system at one time at 120° C., and reacted for 60 minutes. All the other are the same as in Example 1.
[0114] This embodiment obtains EPDM graft copolymer A2.
[0115] The relevant reaction conditions of this embodiment are specifically listed in Table 1, and the flame retardancy and mechanical properties of the EPDM graft copolymer A2 were analyzed and measured, and the results are shown in Table 2.
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Abstract
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