Irradiation crosslinking nylon material and preparation method thereof
A nylon and irradiation technology, which is applied in the field of nylon material modification, can solve the problems that need to be improved, and achieve the effect of enhancing the ability to resist deformation, increasing the strength of the material, and improving the heat resistance
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Embodiment 1
[0028] (1) Take 4300g of nylon 66, 100g of trimethylolpropane trimethacrylate, 300g of calcium zinc stabilizer, 100g of layered nano-zirconium phosphate, 300g of ethylene-vinyl acetate copolymer, and add it to a high-speed mixer at 400-600rpm Mix for 15-20 minutes. Put the mixed material into the twin-screw extruder, the screw temperature is 260°C, the host speed is 300-400rpm, the feeding speed is 600-800rpm, and extruded to granulate. Put part of the granulated particles into an oven at 80°C, and bake for 3 hours for later use;
[0029] (2) Partially granulated particles were irradiated with cobalt source gamma rays at an absorbed dose of 100kGy, and then placed in an oven at 45°C for 1 hour to fully remove small molecular free radicals. The irradiated modified nylon 66 particles and the non-irradiated modified nylon 66 particles were placed in a muffle furnace at 260°C and heated for 1 min to compare the difference in temperature resistance before and after irradiation.
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Embodiment 2
[0032] (1) Take 4475g of nylon 6, 75g of triallyl cyanurate, 100g of barium stearate, 50g of zinc-calcium stabilizer, and 300g of ethylene-vinyl acetate copolymer, and add them to a high-speed mixer at 400-600rpm and mix for 15 ~20min. Put the mixed material into the twin-screw extruder, the screw temperature is 260°C, the host speed is 300-400rpm, the feeding speed is 600-800rpm, and extruded to granulate. Put part of the granulated particles into an oven at 80°C, and bake for 3 hours for later use;
[0033] (2) Part of the granulated particles were irradiated with an absorbed dose of gamma rays from a cobalt source of 60kGy, and then placed in an oven at 50°C for 1 hour to fully remove small molecular free radicals. Take the above-mentioned irradiated modified nylon 6 particles and the non-irradiated modified nylon 6 particles to test the difference in melt index, see the following table:
[0034] Melt index (300°C, 1.2kg)
[0035] product name Melt index (g / 1...
Embodiment 3
[0037] (1) Take 4125g of nylon 6, 75g of trimethylolpropane trimethacrylate, 100g of aluminum stearate, 200g of talcum powder, 400g of ethylene-vinyl acetate copolymer, 100g of black masterbatch, and put them in a high-speed mixer at 400~ Mix at 600rpm for 15-20min. Put the mixed material into the twin-screw extruder, the screw temperature is 260°C, the host speed is 300-400rpm, the feeding speed is 600-800rpm, and extruded to granulate. Put the granulated particles into an oven at 80°C and bake for 3 hours for later use;
[0038] (2) Injection-molding the above-mentioned dried modified nylon 6 particles into a square template of 10cm×10cm and 3mm in thickness, and the injection molding temperature is 280°C. Some of the samples were taken and irradiated with an electron beam of 60kGy in an electron accelerator, and then placed in an oven at 60°C for 1 hour to fully remove small molecular free radicals. Take the irradiated modified nylon 6 square sample and the non-irradiated...
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