Preparation method of polyolefin solid-phase grafted maleic anhydride

Abstract

The invention discloses a preparation method of polyolefin solid-phase grafted maleic anhydride, which comprises the following steps of uniformly mixing an interface agent, an initiator and MAH) to form a transparent solution, putting polyolefin solid powder into a reactor, and starting stirring under the protection of inert gas, adding the obtained transparent solution into the reactor in a spraying mode, and fully swelling polyolefin by the interface agent in the transparent solution under the stirring condition, heating the materials in the reactor, and carrying out high-temperature stirring reaction to obtain a coarse grafted product, keeping the heating and stirring states of the reactor, and vacuumizing the interior of the reactor to obtain mixed gas and a product, and condensing the mixed gas and then returning to the first step, and washing and drying a product to obtain a final product, namely the solid polyolefin grafted MAH. According to the production process, polyolefin with low odor and high grafting rate can be prepared, and the problems that the residual MAH monomer and the odor of the residual MAH monomer cannot be completely removed in the application of a grafting product and the like are solved.

Description

technical field [0001] The invention belongs to the field of polyolefins, in particular to a preparation method of polyolefin solid-phase grafted maleic anhydride. Background technique [0002] Polyolefin materials have the advantages of high cost performance, excellent thermal and mechanical properties, and good processability, and are widely used. However, the inherent non-polarity / surface activity of polyolefin materials and poor compatibility with polar materials lead to their dyeability, adhesion, hydrophilicity, antistatic properties, and compatibility with other polymer materials or inorganic materials. The compatibility of fillers is relatively poor, which limits the application fields of polyolefin materials. Through structural functional modification of polyolefin, the introduction of polar groups on the main chain after polyolefin graft modification can enhance the interfacial bonding strength between the polymer and the inorganic filler, and improve the compatib...

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Problems solved by technology

During the production process, a large amount of waste gas is passed into the acetone solution. It is necessary to further separate the waste liquid to realize the recycling of the solvent acetone. In this process, the controlled solvent acetone is used. On the other hand, the separation of the waste liquid itself will cause High energy consumption will greatly increase the production cost (Wang Liwei, Research on Polypropylene Solid Phase Grafting Maleic Anhydride, Master Thesis of Dalian University of Technology, 2008)

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