A kind of active controllable radical vinyl polymer and its polymerization method

Abstract

An active controllable free radical vinyl polymer and its polymerization method, the polymer is mainly prepared by polymerizing the following raw materials: metal porphyrin compound, initiator, vinyl monomer and organic solvent. The polymerization method comprises the following steps: (1) placing the organic solution in a closed reaction container, adding a metalloporphyrin compound and an initiator, filling in nitrogen, replacing the air in the closed reaction container, and stirring the reaction to obtain the initiated (2) Add vinyl monomer to the initiator solution obtained in step (1), stir and react, under the protection of nitrogen, heat up the polymerization reaction, cool to room temperature, and serve. The molecular weight of the polymer of the present invention is controllable, the molecular weight distribution is narrow, and can be designed according to different molecular weight requirements, the conversion rate can be as high as 99.20%, and the cost is low; the polymerization method of the present invention has a wide application range of reaction temperature, low cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a vinyl polymer and a polymerization method thereof, in particular to an active controllable radical vinyl polymer and a polymerization method thereof. Background technique [0002] Acrylic / styrene polymers are usually prepared by the traditional free radical polymerization method. Although the preparation method is simple, the traditional free radical polymerization method cannot obtain a copolymer with controllable molecular weight and uniform molecular weight distribution, and cannot synthesize high solid content. , low viscosity and high performance acrylic resin. [0003] In 1956, Szwarc and others proposed the concept of living polymerization. Through living polymerization, homopolymers with specified molecular weight and narrow molecular weight distribution can be synthesized, molecular design can be realized, and a series of polymers with different structures and specific properties can be synthesized, such as special f...

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Problems solved by technology

Reverse ATRP uses common free radical initiators such as BPO and AIBN as initiators, which reduces production costs, and the reverse ATRP initiation system avoids the deficiency of the forward ATRP initiation system, that is, halogenated compounds are more toxic to the human body , transition metal compounds in a low oxidation state are easily oxidized by oxygen in the air, and storage is difficult, etc. However, reverse ATRP polymerization has the disadvantages of large catalyst content and high reaction temperature

[0006] In summary, although the existing living polymerization technology has been able to produce some polymers with controllable structures, their reaction process is complicated, the reaction conditions are relatively harsh, and they need no water and no oxygen, which leads to high production costs and is difficult to achieve industrialization. thus greatly limiting their application prospects

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