A kind of preparation method of high-grafting-rate polyolefin graft and application of the high-grafting-rate polyolefin graft
A technology of polyolefin grafts and high grafting rate, which is applied in the application of high grafting rate polyolefin grafts and the preparation field of high grafting rate polyolefin grafts, can solve the problem of high residual monomer content, High equipment requirements, low grafting rate and other problems, to achieve the effect of low residual monomer, long vacuuming time and low reaction temperature
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Embodiment 1
[0029] A kind of preparation method of high grafting rate polyolefin graft of the present invention comprises the following steps:
[0030] (1) Vacuum the reactor first, then fill the reactor with nitrogen to replace all the air in the reactor with nitrogen, and heat the reactor to 150°C;
[0031] (2) under the protection of nitrogen, 1980g polyethylene is added in the reactor, after the polyethylene melts, add 20g maleic anhydride, 2g triphenyl phosphite and 2g dicumyl peroxide, stir and react for 30min;
[0032] (3) Then vacuumize the reactor to -0.09MPa to continue the reaction for 30 minutes, and finally extrude the reaction material under high pressure and cut it into pellets to obtain the polyolefin graft.
Embodiment 2
[0038] A kind of preparation method of high grafting rate polyolefin graft of the present invention comprises the following steps:
[0039] (1) Vacuum the reactor first, then fill with nitrogen to replace all the air in the reactor with nitrogen, and heat the reactor to 80°C;
[0040] (2) Under the protection of nitrogen, add 1900g ethylene-octene copolymer to the reactor, after the ethylene-octene copolymer melts, add 100g maleic anhydride, 60g triphenyl phosphite and 15g diphenyl peroxide Acyl, stirred and reacted for 360min;
[0041] (3) Then vacuumize the reactor to -0.09MPa to continue the reaction for 60 minutes, and finally extrude the material obtained from the reaction under high pressure, and pelletize the strands to obtain the polyolefin graft.
Embodiment 3
[0047] A kind of preparation method of high grafting rate polyolefin graft of the present invention comprises the following steps:
[0048] (1) Vacuum the reactor first, then fill the reactor with nitrogen to replace all the air in the reactor with nitrogen, and heat the reactor to 180°C;
[0049] (2) 1960g polypropylene is added in the reactor under the protection of nitrogen, after the polypropylene is melted, add 40g maleic anhydride, 4g triphenyl phosphite and 4g dibenzoyl peroxide, stir and react for 5min;
[0050] (3) Then vacuumize the reactor to -0.09MPa to continue the reaction for 30 minutes, and finally extrude the reaction material under high pressure and cut it into pellets to obtain the polyolefin graft.
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