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A kind of method of small molecule phenol modification pbat

A phenol-modified, small-molecule technology, applied in the field of small-molecule phenol-modified PBAT, can solve the problem that the elongation at break and impact strength of composite materials cannot meet the demand, and achieve the improvement of elongation at break, reduce the amount of use, and improve the The effect of conversion rate

Active Publication Date: 2022-04-12
JIANGSU CHINA NUCLEAR IND HUAWEI ENGDESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For another example, Chinese patent application 202011609520.4 discloses a biodegradable polyester PBAT composite material and its preparation method. The ester group acts to form hydrogen bonds, and the prepared PBAT modified material is blown and mixed with organic additives to prepare the PBAT composite material, which has the advantages of good fluidity, which makes the PBAT composite material have high flexibility and mechanical properties, but The elongation at break and impact strength of the obtained composite material cannot meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 A kind of method of small molecule phenol modified PBAT

[0042] Include the following steps:

[0043] (1) Esterification reaction: 36.05g (0.4mol) 1,4-butanediol (BDO), 14.6g (0.1mol) adipic acid (AA) and 33.2g (0.2mol) terephthalic acid (PTA ) was placed in a reaction kettle, heated and stirred, and after stirring evenly, 23.9 mg of tetrabutyl titanate was added, and the temperature was raised to 200° C. for 5 hours to obtain a prepolymer;

[0044](2) Melt polycondensation reaction: Add 4.78g 2,2-bis(4-hydroxyphenyl)propane to the prepolymer obtained in step (1) and react at 200°C for 5 hours under 250Pa vacuum condition, and obtain modified polycondensate after cooling. sex PBAT.

Embodiment 2

[0045] Embodiment 2 A kind of method of small molecular phenol modified PBAT

[0046] Include the following steps:

[0047] (1) Esterification reaction: 36.05g (0.4mol) 1,4-butanediol (BDO), 14.6g (0.1mol) adipic acid (AA) and 33.2g (0.2mol) terephthalic acid (PTA ) was placed in a reaction kettle, heated and stirred, and after stirring evenly, 38.24 mg of tetraisopropyl titanate was added, and the temperature was raised to 180° C. for 3 hours to obtain a prepolymer;

[0048] (2) Melt polycondensation reaction: add 7.17g 2,2-bis(4-hydroxyphenyl)propane and 4,4-dihydroxydiphenylmethane (both mass ratio 1:1) was reacted at 220°C for 5 hours under 250Pa vacuum condition, and modified PBAT was obtained after cooling.

Embodiment 3

[0049] Embodiment 3 A kind of method of small molecule phenol modified PBAT

[0050] Include the following steps:

[0051] (1) Esterification reaction: 54.07g (0.6mol) 1,4-butanediol (BDO), 14.6g (0.1mol) adipic acid (AA) and 49.8g (0.3mol) terephthalic acid (PTA ) was placed in a reaction kettle, heated and stirred, and after stirring evenly, 38.64 mg of tetrabutyl titanate and magnesium oxide (the mass ratio of the two was 1:1) were added, and the temperature was raised to 150 ° C for 3.5 hours to obtain a prepolymer;

[0052] (2) Melt polycondensation reaction: add 8.372g 2,2-bis(4-hydroxyphenyl) propane and 4,4-dihydroxydiphenylmethane (both mass ratio 1:1) was reacted at 240°C for 3 hours under 280Pa vacuum condition, and modified PBAT was obtained after cooling.

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Abstract

The invention provides a small molecular phenol modified PBAT method, which belongs to the technical field of polymer modification. The method comprises the following steps: (1) esterification reaction: placing the reactant in a reactor, stirring evenly, adding a catalyst to carry out esterification reaction to obtain a prepolymer; (2) melt polycondensation reaction: adding to step (1 ) in the prepolymer obtained by adding a modifying agent to carry out melt polycondensation reaction, after cooling, modified PBAT is obtained; The mixture of methane acts as a modifier to form hydrogen bonds with the ester groups in the prepolymer to improve the physical properties of the polymer. By controlling 2,2-bis(4-hydroxyphenyl)propane and 4,4-bis The mass ratio of hydroxydiphenylmethane is 1:1, which obviously improves the elongation at break, impact strength and transparency of the polymer; the process of the method is simple and can realize industrialization.

Description

technical field [0001] The invention relates to the technical field of polymer modification, in particular to a method for small molecule phenol modified PBAT. Background technique [0002] Poly(butylene adipate-butylene terephthalate) (PBAT) is an aliphatic-aromatic compound prepared from adipic acid, terephthalic acid and butanediol by direct esterification or transesterification. Family copolyester, which combines the excellent degradation performance of aliphatic polyester and the good mechanical properties of aromatic polyester, has good ductility and elongation at break, as well as good heat resistance and impact performance, and It is an environmentally friendly copolyester that can be degraded under the action of microbial metabolism, so it has a wide range of applications in packaging, agriculture and medical fields, but its crystallization performance, processability and economy still need to be improved. This limits its application in the field of fiber and membr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/195C08G63/83C08G63/85
CPCC08G63/195C08G63/85C08G63/83
Inventor 吴江蛟杨怀英蔡贞玉阚道远袁红兰杨永青张寅秋李鹏
Owner JIANGSU CHINA NUCLEAR IND HUAWEI ENGDESIGN & RES
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