Preparation method of degradable poly-alpha-olefin material with controllable olefin insertion rate

A technology of insertion rate and olefin, applied in the field of polyolefin materials, to achieve the effects of safety and environmental protection in the production process, mild reaction conditions, and high reaction conversion rate
CN112175173AActive Publication Date: 2021-01-05UNIV OF SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SCI & TECH OF CHINA
Publication Date
2021-01-05

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Abstract

The invention provides a preparation method of a degradable poly-alpha-olefin material with controllable olefin insertion rate, which comprises the following step: reacting cycloenone acetal, an alpha-diimine palladium catalyst, a nucleophilic reagent and alpha olefin under the irradiation of visible light to obtain the degradable poly-alpha-olefin material. According to the application, the cycloenone acetal and the alpha olefin are copolymerized by combining free radical ring-opening polymerization of the cycloenone acetal and coordination polymerization of the alpha olefin, and degradable units (ester bonds) are introduced into all copolymer carbon skeletons. The preparation method is mild in reaction condition, heating is not needed, and the olefin insertion rate can be adjusted in a wide range with the mass ratio of 23-71%. By means of the preparation method, the production cost can be effectively reduced, and environmental pollution caused by polyolefin is avoided.
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Description

technical field

[0001] The invention belongs to the technical field of polyolefin materials, and in particular relates to a preparation method of a degradable polyalpha-olefin material with controllable olefin insertion rate and the degradable polyalpha-olefin material with controllable olefin insertion rate obtained by the preparation method. Background technique

[0002] Cycloketene acetal (CKA) monomers can generate polymers with the same repeating units as polylactones after free radical ring-opening polymerization, and the ester units can be degraded under the action of enzymes or alkalis. Copolymerization of this monomer with other monomers is an important method for preparing degradable polymers. However, although people have used cyclic ketene acetal and ethylene to synthesize degradable polyethylene through free radical copolymerization, for α-olefins, the existence of chain transfer reactions makes it impossible to generate high molecular weight polymers through fr...

Claims

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