High-current ethylene-vinyl acetate copolymer grafted maleic anhydride product, preparation method and application thereof

Abstract

The invention discloses a searching ethylene-vinylacetate copolymer grafted maleic anhydride product which is made of the raw materials with following weight percentage: ethylene-vinylacetate copolymer is 100 percent by weight, maleic anhydride is 0.5 to 5 percent by weight, an initiator is 0.03 to 0.4 percent by weight, and an antioxidant is 0.1 to 0.5 percent by weight. The preparation method is that the raw materials with the weight percentage are added into an extruder, reaction is carried out at the temperature between 150 DEG C and 190 DEG C, and then granulation is extruded to obtain the needed product. The searching ethylene-vinylacetate copolymer grafted maleic anhydride product of the invention can be applied for preparing hot-melt adhesive. The entire preparation process of theproduct has the advantages of high controllability and little gelatinization in the reaction product; the grafting efficiency of maleic anhydride can reach as high as 75 percent. The prepared searching ethylene-vinylacetate copolymer grafted maleic anhydride product can be easily dispersed on the interfaces of multiple blends containing polar polymers, so as to improve the cohesive force among interfaces, thus promoting the overall property of the blends.

Description

technical field The invention belongs to the technical field of polymer materials, in particular to a high-fluidity ethylene-vinyl acetate copolymer (EVA) grafted maleic anhydride product and its preparation method and application. Background technique Ethylene-vinyl acetate copolymer (EVA) is the fourth largest ethylene series copolymer after high-density polyethylene (HDPE), low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE). With the increase of ester (VA) content, the elasticity, softness, transparency, adhesion, compatibility and solubility of EVA are also improved accordingly. According to the different VA content, it can be divided into three categories: VA resin with a mass percentage of 5% to 40%, called EVA resin, is mainly used to modify polyethylene and other materials, and manufacture wire and cable materials; If the mass percentage is 40% to 70%, it is generally called EVA elastomer, which is mainly used as rubber elastomer, polyvinyl ...

AI Technical Summary

Problems solved by technology

The existing general and simple grafting technology is to mix the raw materials directly into the extruder for reaction, extrusion and granulation. The uniformity of raw material mixing, the controllability of the reaction process and the stability of the long-term production of the product are not reliable.

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