Biodegradable high-polymer additive, preparation method and application thereof

A biodegradation and additive technology, applied in the field of polymer materials, can solve problems such as no research reports, and achieve the effects of improving mechanical properties, good compatibilization effect, and reducing melt viscosity

Inactive Publication Date: 2013-04-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Biodegradable high-polymer additive, preparation method and application thereof
  • Biodegradable high-polymer additive, preparation method and application thereof
  • Biodegradable high-polymer additive, preparation method and application thereof

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preparation example Construction

[0047] The specific steps and conditions for preparing the biodegradable additive with branched structure provided by the invention are as follows:

[0048] 1) preparation of macromolecular initiator containing side hydroxyl

[0049] Dissolve the protective group-containing glycidyl alcohol in tetrahydrofuran in a dry reaction vessel, heat to 30-70°C, and the reaction time is less than 72h. Until the reaction is complete, under the protection of argon, the cyclic ester mono Add the tetrahydrofuran solution of the solid body into the reaction system, react at 0-70°C for <24h, remove the organic solvent, and obtain a block copolymer containing hydroxyl protecting groups. Then, dissolve the block copolymer in a mixed solvent of organic solvent / water, and react under acidic conditions at 0-50°C for <48h to remove the ethyl ethoxy group from the side chain of the copolymer, A macromolecular initiator containing side hydroxyl groups is obtained.

[0050] 2) Preparation of additive...

Embodiment 1

[0057] Embodiment 1, preparation PCL-b-PG-g-PLLA

[0058] Add 1g of ethoxyethyl glycidyl ether into a dry reaction vessel, add 0.5mL potassium tert-butoxide tetrahydrofuran solution (1mol / L) and 3mL tetrahydrofuran at the same time, react at 60°C for 24h; At room temperature, 5 mL of caprolactone monomer tetrahydrofuran solution (0.333 g / mL) was slowly added dropwise to the reaction vessel, and reacted for 4 h at 40 ° C; the reaction mixture was poured into ether to precipitate and wash, and after drying, poly(ε -caprolactone-b-ethoxyethyl glycidyl ether) (PCL-b-PEEGE). Dissolve 3g of poly(ε-caprolactone-b-ethoxyethyl glycidyl ether) in 15ml of acetone, then add the aqueous solution of oxalic acid into the polymer solution, react at room temperature for 16h, then add calcium hydroxide, The molar ratio of hydroxyl / oxalic acid / calcium hydroxide in the polymer is 1 / 0.5 / 1. After reacting for 1 hour at room temperature, the precipitate in the solution is removed by centrifugation,...

Embodiment 2

[0060] Embodiment 2, preparation PCL-b-PG-g-PLLA

[0061] Add 1g of ethoxyethyl glycidyl ether into a dry reaction vessel, add 6.8uL potassium tert-butoxide tetrahydrofuran solution (1mol / L) and 1mL tetrahydrofuran at the same time, and react at 20°C for 168h; under the protection of argon At room temperature, slowly drop 0.75mL caprolactone monomer tetrahydrofuran solution (0.5g / mL) into the reaction vessel, and react at 0°C for 6h; pour the reaction mixture into diethyl ether for precipitation and washing, and obtain poly( ε-caprolactone-b-ethoxyethyl glycidyl ether) (PCL-b-PEEGE). Dissolve 1g of poly(ε-caprolactone-b-ethoxyethyl glycidyl ether) in 15ml of acetone, then add the aqueous solution of oxalic acid into the polymer solution, react at room temperature for 16h, then add calcium hydroxide, The molar ratio of hydroxyl / oxalic acid / calcium hydroxide in the polymer is 1 / 0.5 / 1. After reacting for 1 hour at room temperature, the precipitate in the solution is removed by c...

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Abstract

The invention discloses a biodegradable high-polymer additive with a branching structure, a preparation method and application thereof. A branched polymer provided by the invention is formed by combining sequential ring opening polymerization and coordination ring opening polymerization of negative ions, polycaprolactone (PCL) and poly l-lactic acid (PLLA) or poly d-lactic acid (PDLA) and propanol polyepoxide are prepared into a graft polymer with a controllable structure. The length of each inlay section of a main chain of the branched polymer and the length of a grafted chain can be regulated and controlled by changing a monomer feeding rate. The branched polymer not only has good volume increasing effect for a polylactic acid / polycaprolactone blend system, but also can reduce the melt viscosity and improve the processability of blends.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a biodegradable polymer additive with a branched structure and a compatibilization modification function, and a preparation method and application thereof. Background technique [0002] Polylactic acid (Poly lactic acid, PLA) is a biodegradable synthetic polymer material with excellent biocompatibility. PLA, a biodegradable aliphatic polyester, is usually obtained from some renewable natural plants through chemical synthesis. Under the action of microorganisms, water, acid and alkali, PLA is finally degraded into carbon dioxide and water, and its degradation products can participate in human metabolism. Due to its excellent biocompatibility, polylactic acid has been approved by the US Food and Drug Administration (FDA), and can be used as medical surgical sutures, injection capsules, microspheres and implants. In addition, PLA has good mechanical properties and is eas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/08C08G63/06
Inventor 甘志华毛静
Owner INST OF CHEM CHINESE ACAD OF SCI
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