Polyethylene/polybutene thermoplastic elastomer alloy material and preparation method thereof
A thermoplastic elastomer and alloy material technology, applied in the preparation of polyethylene/polybutene thermoplastic elastomer alloy materials, polyethylene/polybutene thermoplastic elastomer alloy materials, can solve the problem of inability to achieve high conversion rate, identical Low content, low crystallinity and other problems, to achieve the effect of good hydrogen adjustment sensitivity, high polymerization activity, strong crystallization ability
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Embodiment 1
[0033]1L fully enclosed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then metered and added n-heptane, triethylaluminum (Al), MgCl2 supported TiCl4 catalyst (Ti content 2.5wt. %) 0.25g, add ethylene 0.05Kg, wherein Al / Ti=50 (molar ratio). Stir and polymerize at 0°C for 5 minutes, then heat up and depressurize to evacuate ethylene and n-heptane, flush it into a new reactor with inert gas, replace the inert gas with ethylene to a pressure of 0.2MPa, and then add 0.02MPa of hydrogen at 60 React at ℃ for 6 minutes, then evacuate ethylene and hydrogen, add 0.3Kg butene-1, react at 50℃ for 1 hour, evacuate butene-1, further feed ethylene to a pressure of 0.2MPa, maintain 6 minutes, then evacuate ethylene, add 0.3Kg of butene-1 and 0.01MPa hydrogen, reacted for 1h, and circulated twice like this. At the same time, the pre-polymerization of ethylene was continuously carried out in the pre-polymerization ...
Embodiment 2
[0035] 1L fully-sealed magnetic stirring gas-phase stainless steel pressure polymerization kettle, pumped and replaced several times with high-purity nitrogen, then metered 150ml of hexane, external electron donor, triethylaluminum (Al) and MgCl2 loaded tetrachloride into the reaction kettle Titanium oxide catalyst (titanium content 4wt%) 0.25g, add 0.03Kg of ethylene, wherein Al / Ti=80 (molar ratio), 0 ℃ of stirring polymerization 5min, then raise the temperature and depressurize to empty ethylene and hexane, use inert gas Pour it into a new reactor, replace the inert gas with ethylene to a pressure of 0.1MPa, then add 0.02MPa hydrogen to react at 50°C for 6 minutes, then empty the ethylene and hydrogen, add 0.3Kg butene-1, and react at 50°C for 1h , evacuate butene-1, further feed ethylene to a pressure of 0.1MPa, and maintain for 6min, then evacuate ethylene, add 0.3Kg of butene-1 and 0.01MPa hydrogen, react for 1h, and cycle like this for 3 times, after the drying is termina...
Embodiment 3
[0037] 10L fully-closed loop reactor, after pumping and replacing several times with high-purity nitrogen, metered and added heptane 150ml, triethylaluminum (Al) and MgBr successively in the reactor ) 1.0g, add ethylene 0.3Kg, wherein Al / Ti=50 (molar ratio). Stir and polymerize at 0°C for 5 minutes, then heat up and depressurize to evacuate ethylene and n-heptane, flush it into a new reactor with inert gas, replace the inert gas with ethylene to a pressure of 0.1MPa, and then add 0.02MPa of hydrogen at 40 React at ℃ for 8 minutes, then evacuate ethylene and hydrogen, add 3Kg of butene-1, react at 50℃ for 1 hour, evacuate butene-1, further feed ethylene to a pressure of 0.1MPa, and maintain it for 8 minutes, then evacuate ethylene, add 3Kg Butene-1 and 0.01MPa hydrogen, reacted for 1h, and circulated like this for 5 times, and obtained 4.2kg of powdery polymer directly after the drying was terminated. The properties of the alloy are shown in Table 1.
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