A kind of grafting reaction device and using method thereof

Abstract

The invention discloses a grafting reaction device and a use method thereof. The grafting reaction device comprises a weightlessness feeding device, a single-screw melting device, an aid adding device, a twin-screw grafting reaction device and a vacuum devolatilization device. The use method comprises steps as follows: 1) a premix is added to the single-screw melting device by the weightlessness feeding device; 2) the single-screw melting device plasticizes and melts the premix into polymer melt and introduces the polymer melt into the twin-screw grafting reaction device; 3) the aid adding device adds aids to one or two heating zones of the twin-screw grafting reaction device; a graft polymer is formed through a grafting reaction in the twin-screw grafting reaction device and then introduced into the vacuum devolatilization device; 4) a solvent and non-reacted grafting aids are removed from the vacuum devolatilization device, and a finished product is obtained. The reaction device can effectively reduce crosslinked byproducts in the melting graft process of the polymer.

Description

technical field [0001] The invention relates to a grafting reaction device and an application method thereof, belonging to the technical field of polymer material processing. Background technique [0002] Chemical grafting is a common technique for modifying polymers. Grafting can increase the adhesive strength of polymers and improve the compatibility of polymer blends. The main graft copolymerization methods include solution grafting, melt grafting and solid phase grafting methods. However, under the current preparation formula and process conditions, there are many side reactions in the grafting process, such as the degradation of polypropylene, the coupling of polypropylene molecular chains, and the self-polymerization of maleic anhydride, which lead to an increase in gel content and grafted products The color is yellow; and due to the short reaction time, the initiator and maleic anhydride that did not participate in the reaction remain, which will produce a pungent od...

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Problems solved by technology

Compared with solution grafting, the main difference between melt grafting and solution grafting is that the grafting reaction process is in the reaction time and degree of intensity. If the reaction process is too intense, the probability of side reactions will increase. Therefore, designing a method that can control and improve melt grafting The reaction device of the reaction process can produce polyolefin grafts with excellent performance

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