A kind of preparation method of polyester-polycarbonate-polyester multi-block copolymer

A multi-block copolymer and polycarbonate technology, applied in the field of polymer materials, can solve problems such as narrow dispersion, and achieve the effect of simple operation and simple structure.
CN105153408BActive Publication Date: 2017-11-07NANJING TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING TECH UNIV
Publication Date
2017-11-07

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Abstract

The invention discloses a preparation method of a polyester-polycarbonate-polyester multi-block copolymer, belonging to the technical field of polymer materials. In the present invention, the multi-block polymerization is accomplished by the "one-pot method", that is, the Bronsted acid catalyst sequentially catalyzes the ring-opening polymerization of cyclic lactones and cyclic carbonates, and then puts in a preset relative acid excess tertiary amine (R3N: ), wherein the acid in the system forms the conjugate acid R3N+-Hδ+ of the base itself as a hydrogen bond donor, and the excess base acts as a hydrogen bond acceptor, and the bifunctional catalyzes the ring-opening of the lactide that is finally put into Polymerization to finally synthesize polyester‑polycarbonate‑polyester triblock copolymers. The invention has the following advantages: the structure of the catalyst is simple and easy to obtain, the reaction is mild and efficient, the "one-pot method" is easy to operate, the whole polymerization reaction is active, the molecular weight of the polymer is controllable and the molecular weight distribution is narrow.
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Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a catalytic method for precisely preparing a polyester-polycarbonate-polyester multi-block copolymer with a narrow polydispersity. Background technique

[0002] Polyester and polycarbonate materials have far-reaching research significance and broad industrial application prospects because of their biodegradability and environmental friendliness. At the same time, they have good biocompatibility, have no obvious toxicity and rejection to organisms, and can be well applied in the field of biomedicine.

[0003] Ring-opening polymerization is a method of preparing polyester and polycarbonate polymers. In the early ring-opening polymerization reaction, metal catalysts such as organotin salts, organozinc salts and organoaluminum salts are generally used as catalysts, such as JP0124651, CN1544504 ​​and CN1814644. It has been extensively studied in ring-opening po...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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