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Aliphatic polyester ionomer and preparation method thereof

A technology of aliphatic polyester and ionic polymer, applied in the field of aliphatic polyester ionic polymer and its preparation, can solve the problems of poor tear resistance, difficult polymerization reaction, preparation of film products, etc., and achieve excellent blow molding properties, low shear thinning effect, melt viscosity increasing effect

Active Publication Date: 2016-09-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although introducing a small amount of dimethyl isophthalate-5-sodium sulfonate can improve the rheological properties and mechanical properties of aliphatic polyester to a certain extent, but due to the reaction of dimethyl isophthalate-5-sodium sulfonate The activity is low, and the polymerization reaction becomes more difficult after the introduction, so the intrinsic viscosity of the aliphatic polyester ionomer reported in the literature is usually lower than 1.2dL / g, so that during the processing, as the temperature increases, Melt viscosity and strength still drop rapidly, and shear thinning is also very obvious. Film products cannot be prepared by casting, film blowing, etc. Even if films can be produced, their tear resistance is very poor
Therefore, the application of this biodegradable aliphatic polyester ionomer in the film field is limited.

Method used

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  • Aliphatic polyester ionomer and preparation method thereof
  • Aliphatic polyester ionomer and preparation method thereof
  • Aliphatic polyester ionomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029]Add succinic acid, butanediol and N,N,-dimethyl-N,N-dihydroxyethylammonium chloride into the reaction device at a molar ratio of 100:99.7:0.3, and esterify at 180°C under nitrogen protection reaction for 4 hours, then add 0.1% tetrabutyl titanate based on the total mass of the reactants, conduct polycondensation reaction at 220°C and ≤30Pa high vacuum conditions for 3 hours, and then discharge.

[0030] The intrinsic viscosity of the obtained aliphatic polyester ionomer is 1.5dL / g, and the complex viscosity is the complex number of pure aliphatic polyester (without quaternary ammonium salt ion monomer) at any specified temperature of 120-200°C. 2 to 3 times the viscosity value.

Embodiment 2

[0032] Add adipic acid, ethylene glycol and N,N,-dimethyl-N-hydroxyethyl-N-hydroxypropylammonium chloride into the reaction device at a molar ratio of 100:99:1, and under nitrogen protection, Esterification reaction at 150°C for 3 hours, then adding 0.01% tetraisopropyl titanate based on the total mass of the reactants, polycondensation reaction at 200°C, ≤30Pa high vacuum conditions for 4 hours, and then discharging.

[0033] The intrinsic viscosity of the obtained aliphatic polyester ionomer is 1.6dL / g, and the complex viscosity is the complex number of pure aliphatic polyester (without quaternary ammonium salt ion monomer) at any specified temperature of 120-200°C. 1.9 to 2.6 times the viscosity value.

Embodiment 3

[0035] Add malonic acid, pentanediol and N,N,-dimethyl-N-hydroxyethyl-N-hydroxybutylammonium bromide into the reaction device at a molar ratio of 100:97:3, and under nitrogen protection, Esterification reaction at 160°C for 3.5 hours, then adding 0.03% stannous chloride based on the total mass of reactants, polycondensation reaction at 220°C, ≤30Pa high vacuum conditions for 6 hours, and then discharging.

[0036] The intrinsic viscosity of the obtained aliphatic polyester ionomer is 1.8dL / g, and the complex viscosity is the complex number of pure aliphatic polyester (without quaternary ammonium salt ion monomer) at any specified temperature of 120-200°C. 1.8 to 2.5 times the viscosity value.

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Abstract

The invention discloses an aliphatic polyester ionic polymer, which is prepared from aliphatic dibasic acid, aliphatic dihydric alcohol and a quaternary ammonium salt ionic monomer according to a mol ratio of 100:99.7:0.3-100:85:15 under the protection of nitrogen through esterification and polycondensation in sequence. The general structural formula of the aliphatic polyester ionic polymer is defined in the description. The aliphatic polyester ionic polymer has the intrinsic viscosity of 1.5-2.0 dL / g and the complex viscosity which is 1.6-3.1 times of that of pure aliphatic polyester at any appointed temperature in a range of 120-200 DEG C. The intrinsic viscosity and complex viscosity of the aliphatic polyester ionic polymer obtained in the invention are greatly improved, so that relatively high melt-strength, a low shear thinning effect, and excellent blow molding ability are ensured during a machine-shaping process, especially a blow molding process, and excellent foundation is laid in the application of extending the aliphatic polyester ionic polymer to the field of a film.

Description

technical field [0001] The invention belongs to the technical field of aliphatic polyester polymers and preparation thereof, and in particular relates to an aliphatic polyester ionomer and a preparation method thereof. Background technique [0002] Although aliphatic polyesters are favored as biodegradable thermoplastic polymers with excellent thermal properties, processability and mechanical properties, compared with traditional plastics such as polyethylene, aliphatic polyesters also have many disadvantages. Take polybutylene succinate (PBS), one of the most promising aliphatic polyesters, as an example. Although PBS has excellent thermal stability, high melting point and good mechanical properties, its melt The strength and melt viscosity are low, and the processing performance, especially the film blowing property, is poor. Even if it can be blown into a film, the tear resistance of the film product is also very poor. In addition, the degradation rate of PBS is slow and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C08G63/16
Inventor 王玉忠徐昌连曾建兵
Owner SICHUAN UNIV
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