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Graphene oxide modified PBAT (poly(terephthalic acid)/tetramethylene adipate) resin and preparation method thereof

A technology of graphite modification and graphene, which is applied in the field of its preparation and graphene oxide modified PBAT resin, can solve the problems of non-degradable and white pollution, and achieve the goal of improving post-processing performance, increasing molecular weight and high catalytic efficiency Effect

Inactive Publication Date: 2014-12-03
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since most of the plastic products cannot be degraded after being discarded, they exist for a long time, and the continuous accumulation has caused serious white pollution. Plastic products with environmental protection requirements are becoming more and more urgent and have aroused extensive interest of researchers. Among them, degradable resins have become a research hotspot due to their degradation characteristics and economic characteristics.

Method used

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  • Graphene oxide modified PBAT (poly(terephthalic acid)/tetramethylene adipate) resin and preparation method thereof
  • Graphene oxide modified PBAT (poly(terephthalic acid)/tetramethylene adipate) resin and preparation method thereof
  • Graphene oxide modified PBAT (poly(terephthalic acid)/tetramethylene adipate) resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Add 179g of 1,4-butanediol, 105g of adipic acid and 99g of terephthalic acid into the reaction vessel, stir evenly, add a composite catalyst composed of 0.076g of MgO and 0.38g of tetrabutyl titanate, at a temperature of 180°C Atmospheric pressure esterification was carried out, and the reaction was carried out at constant temperature for 2.5 hours.

[0059] Then add 0.12g stabilizer polycarbodiimide, and heat up to 260°C and depressurize to 100Pa to carry out polycondensation reaction for 2 hours, then add graphene oxide 11g and dispersant EBS7.6g, continue the reaction under the same conditions for 1 Hour, obtain graphene oxide modified PBAT resin.

[0060] After testing, the graphene oxide modified PBAT resin obtained in this example has a tensile strength of 21 MPa, an elongation at break of 580%, and an acid value of 16.2 mol / t.

Embodiment 2

[0062] Add 255g1,4-butanediol, 144g adipic acid and 71g terephthalic acid in reaction vessel, stir, add the composite catalyst that 0.24gMnO and 3.76g two (triethanolamine) diisopropyl titanate form, Atmospheric pressure esterification was carried out at a temperature of 190° C., and the reaction was carried out at a constant temperature for 2 hours.

[0063] Then add 0.47g stabilizer polycarbodiimide, and heat up to 270°C and depressurize to 80Pa to carry out polycondensation reaction for 2 hours, then add 24g of graphene oxide and 9.1g of dispersant EBS, continue the reaction under the same conditions for 1.5 Hour, obtain graphene oxide modified PBAT resin.

[0064] After testing, the graphene oxide modified PBAT resin obtained in this example has a tensile strength of 23 MPa, an elongation at break of 510%, and an acid value of 14.3 mol / t.

Embodiment 3

[0066] Add 110g of 1,4-butanediol, 105g of adipic acid and 79g of terephthalic acid into the reaction vessel, stir well, add 0.18g of Al 2 o 3 The composite catalyst composed of 1.75 g of tetraethyl titanate was subjected to atmospheric pressure esterification at a temperature of 200° C., and the reaction was carried out at a constant temperature for 3 hours.

[0067] Then add 0.26g stabilizer polycarbodiimide, and heat up to 280°C and depressurize to 50Pa to carry out polycondensation reaction for 3 hours, then add 23g of graphene oxide and 5.8g of dispersant EBS, and continue the reaction under the same conditions for 1 Hour, obtain graphene oxide modified PBAT resin.

[0068] After testing, the graphene oxide modified PBAT resin obtained in this example has a tensile strength of 26 MPa, an elongation at break of 460%, and an acid value of 12.5 mol / t.

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Abstract

The invention provides a new method for preparing graphene oxide modified PBAT (poly(terephthalic acid) / tetramethylene adipate) resin. The method comprises the following steps: carrying out polycondensation on terephthalic acid, adipic acid and 1,4-butanediol; and adding graphene oxide to a reaction system in the polycondensation process, continuously reacting till the reaction is finished to obtain the graphene oxide modified PBAT resin. According to the method, graphene oxide materials are reacted with PBAT together in a synthetic process through chemical and physical effects, so that the carboxyl content of a PBAT end is reduced; the mechanical property and heat-resistant property of PBAT are greatly improved by introducing the graphene oxide with excellent thermodynamic property, so that the adaptability is higher and the application field is wider during subsequent processing; and the obtained graphene oxide modified PBAT resin can be used for the fields of packaging materials, agricultural plastic mulching films and the like.

Description

technical field [0001] The invention relates to a polyester resin and a modification method thereof, in particular to a graphene oxide modified PBAT resin and a preparation method thereof. Background technique [0002] At present, with the continuous development of the national economy, the consumption of plastic products is increasing, and synthetic plastics are playing an increasingly important role in production and life. However, since most of the plastic products cannot be degraded after being discarded, they exist for a long time, and the continuous accumulation has caused serious white pollution. Environmentally friendly plastic products are becoming more and more urgent and have aroused extensive interest of researchers. Among them, degradable resins have become a research hotspot due to their degradation characteristics and economic characteristics. [0003] PBAT resin, polybutylene terephthalate / adipate, is obtained from the polycondensation reaction of terephthal...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/78C08G63/85C08G63/83C08G63/84C08K3/04
Inventor 施晓旦邵威金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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