Biodegradable copolymer

A copolymer and biological technology, applied in the field of materials, can solve problems such as insufficient flexibility, reduce costs, simplify the solution refining process, and facilitate industrial production.

Inactive Publication Date: 2011-09-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While having many excellent properties, there are also some shortcomings that cannot well meet the needs of packaging products, and it

Method used

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  • Biodegradable copolymer
  • Biodegradable copolymer
  • Biodegradable copolymer

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Experimental program
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preparation example Construction

[0025] The preparation method of the biodegradable copolymer that the present invention proposes, concrete steps are as follows:

[0026] (1) Place polyhydroxy acid or polyamino acid and polyol, polyacid or polyamine in a vacuum reactor, and direct polycondensation reaction occurs under the action of a catalyst. First react at a vacuum of 1-2KPa and a temperature of 80-120°C for 3-5 hours, then vacuumize to control the vacuum below 100Pa, and continue to react for 3-25 hours at a temperature of 130-180°C. Obtain copolymer prepolymer;

[0027] (2) the copolymer prepolymer obtained in the step (1) is placed in the reactor, and the vacuum degree is below 100Pa, under N 2 In the atmosphere, the copolymer undergoes polymerization reaction under the action of the coupling agent, the polymerization temperature is 150-230 DEG C, and the polymerization reaction time is 10-300 minutes to obtain the desired product.

[0028] By adjusting R 1 , R 2 , R 3 The amount of biodegradable c...

Embodiment 1

[0030] Copolymer component: R1=polyethylene glycol;

[0031] R2=C 13 h 10 ;

[0032] R3 = L-polylactic acid.

[0033]

[0034]

Embodiment 2-3

[0035] Embodiment 2-3: On the basis of embodiment 1, change R1, R2, the component ratio of R3, the result is as follows:

[0036]

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Abstract

The invention belongs to the technical field of materials, and particularly relates to a biodegradable copolymer. In the general structural formula of the copolymer, R1 is polyether or polyester polyol, polyether or polyester polyamine, and polyester or polyether polybasic acid; R2 is CnH2n+1, n is 1 to 5, phenyl and substituted phenyl; and R3 is poly alcohol acid or polyamino acid. The copolymer can comprise less than or equal to 30 molar percent of benzene ring structure. By changing the proportions and composition of R1, R2 and R3, the degradability, heat stability, hydrolysis stability, breaking elongation, flexural strength, tensile strength, impact strength, Young modulus, and rebound resilience of the copolymer can be changed. The biodegradable copolymer can be applied to the fields of automobiles, electronics, spinning, furniture, interior decoration, leather, papermaking, packaging, machinery, building and the like. The biodegradable copolymer is simple and economic, the raw materials are abundant and can be obtained easily, industrial production can be realized easily, the prepared copolymer is biodegradable, and environment-friendly, and has a wide application rang, and the components and the raw materials are easy to recycle.

Description

Technical field [0001] The invention belongs to the field of material technology, and specifically relates to a biodegradable copolymer. Background technique [0002] In recent years, due to the large-scale use of non-renewable petroleum-based compounds to prepare commercial polymers, environmental pollution has been caused. Traditional polymer recycling conditions are very harsh. Due to the high stability of general chemical bonds in the polymer structure, it is usually necessary to The decomposition and recovery of high molecular polymers is carried out at high temperatures. At the same time, many complex side reactions inevitably occur at high temperatures, causing the purity of the recovered products to be greatly reduced. Therefore, the need for new biodegradable and recyclable polymers has become very urgent. [0003] Polyhydroxy acids or polyamino acids with excellent biocompatibility and biodegradability are derived from renewable resource crops (such as corn, cassa...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/60
Inventor 任杰曾超张乃文常少坤冯舒勤
Owner TONGJI UNIV
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