Polyglycolic acid modifier, composition and preparation method and use thereof

A technology of polyglycolic acid and modifier, applied in the field of polyglycolic acid composition and its preparation, can solve the problems of improving the hydrophobicity and mechanical properties of polyglycolic acid, no rare earth polymer additives have been found, and achieve good hydrophobicity Associativity, improving compatibility and machinability, reducing the effect of agglomeration

Active Publication Date: 2022-04-05
BAOTOU RES INST OF RARE EARTHS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no reports have been found on the use of rare earth polymer additives to improve the hydrophobicity and mechanical properties of polyglycolic acid

Method used

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  • Polyglycolic acid modifier, composition and preparation method and use thereof
  • Polyglycolic acid modifier, composition and preparation method and use thereof
  • Polyglycolic acid modifier, composition and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0052] According to one embodiment of the present invention, polyglycolic acid modifier comprises:

[0053] Component A

[0054] 1 to 15 parts by weight of rare earth additives;

[0055] Component B

[0056]

[0057] According to another embodiment of the present invention, polyglycolic acid modifier comprises:

[0058] Component A

[0059] 2 to 10 parts by weight of rare earth additives;

[0060] Component B

[0061]

[0062] According to another embodiment of the present invention, polyglycolic acid modifier comprises:

[0063] Component A

[0064] 2 to 6 parts by weight of rare earth additives;

[0065] Component B

[0066]

[0067]

[0068] The preparation method of polyglycolic acid modifier of the present invention comprises the steps:

[0069] (1) reacting a cationic surfactant with a rare earth salt compound to obtain an organic rare earth compound; reacting an organic rare earth compound with a coupling agent to obtain component A;

[0070] (2) Mi...

Embodiment 1～3

[0103] Under the condition of 50°C water bath, dissolve the cationic surfactant in acetic acid, stir at 55°C for 32min to form a mixed solution; slowly add rare earth carbonate to the mixed solution, first react at 55°C for 70min, then at 70°C The reactant was reacted at ℃ for 1.5h to obtain the reactant; the reactant was dried at 60°C for 3.5h to obtain the organic rare earth compound.

[0104]Mix the coupling agent with an ethanol solvent to obtain a mixed solution, then add acetic acid to adjust the pH of the mixed solution to 5; stir the pH-adjusted mixed solution at 50°C for 450 minutes to obtain a coupling agent solution; slowly add the organic rare earth compound to the In the coupling agent solution, react at 50° C. for 1 h, dry and grind into powder to obtain component A.

[0105] Mix nucleating agent, chain extender, initiator and antioxidant to obtain component B.

[0106] The specific materials and amounts used are shown in Table 1.

[0107] Table 1

[0108] ...

Embodiment 4

[0110] (1) 87 parts by weight of polyglycolic acid and component A obtained in Example 1 are blended and banburyed in a banbury mixer, and then granulated to obtain polyglycolic acid particles; the banburying temperature is 210° C., and the banburying time is 8min, the screw speed of the internal mixer is 70rpm.

[0111] (2) The polyglycolic acid particles were blended with the component B prepared in Example 1, and extruded through a twin-screw extruder to obtain a polyglycolic acid composition. The extrusion temperature was 210° C., and the screw speed of the twin-screw extruder was 40 rpm. The properties of the polyglycolic acid composition are shown in Table 2.

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Abstract

The invention discloses a polyglycolic acid modifier as well as its preparation method and application. The polyglycolic acid modifier includes component A and component B, component A includes: 1-15 parts by weight of rare earth additives; component B includes: 0.1-3 parts by weight of chain extender, 0.05-1 part by weight of nucleating agent 0.1-3 parts by weight of initiator, 0.05-1 part by weight of antioxidant. The polyglycolic acid modifier can improve the hydrophobicity and toughness of the polyglycolic acid. The invention also discloses a polyglycolic acid composition and a preparation method thereof. The polyglycolic acid composition comprises 60-95 parts by weight of polyglycolic acid and 1.5-18 parts by weight of polyglycolic acid modifier. The composition has good hydrophobicity and toughness.

Description

technical field [0001] The invention relates to a polyglycolic acid modifier and its preparation method and application, and also relates to a polyglycolic acid composition and its preparation method. Background technique [0002] Polyglycolic acid (PGA for short), also known as polyglycolic acid, is widely used as a degradable material. Since there are a large number of hydroxyl groups and carboxyl groups on the surface of polyglycolic acid, it is easy to absorb water, and its toughness is insufficient, and it is easy to break and produce cracks. After polyglycolic acid absorbs water, it will cause cracks in the matrix material. Under the condition of external load, the hygroscopicity of polyglycolic acid will be enhanced, and the diffusion rate of cracks will increase. Therefore, while improving the toughness of polyglycolic acid, its hydrophobicity must also be improved, so as to prolong its service life. [0003] CN1768114A discloses a polyglycolic acid composition, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K13/06C08K9/06C08K9/04C08K3/26C08K5/20C08K5/527C08K5/134C08K5/526C08K5/092C08K5/3492C08G63/91
CPCC08K13/06C08K9/06C08K9/04C08K3/26C08K5/20C08K5/527C08K5/1345C08K5/526C08K5/092C08K5/34924C08G63/912C08L67/04
Inventor 曹鸿璋王慧曹露雅芦婷婷周晓东白雪葛瑞祥陈明光吴豪李波于晓丽郭立影田虎虎宋静
Owner BAOTOU RES INST OF RARE EARTHS
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