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A kind of high toughness, high melt strength pla/pbat alloy based on aziridine compatibilizer and preparation method thereof

A technology of compatibilizer and aziridine, which is applied in the field of degradable polymer materials, can solve the problems of less generation of block polymers, low reactivity of compatibilizers, limited improvement of alloy toughness, etc., and achieve fast reaction rate, Excellent melt processing performance and stable melt properties

Active Publication Date: 2021-12-14
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to overcome the technical problems of low reactivity of compatibilizers, low utilization rate, less generation of block polymers, and limited enhancement of alloy toughness in existing PLA / PBAT alloy compatibilization methods, and provides a high-toughness, high-melting PLA / PBAT alloy with bulk strength and preparation method thereof

Method used

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  • A kind of high toughness, high melt strength pla/pbat alloy based on aziridine compatibilizer and preparation method thereof
  • A kind of high toughness, high melt strength pla/pbat alloy based on aziridine compatibilizer and preparation method thereof
  • A kind of high toughness, high melt strength pla/pbat alloy based on aziridine compatibilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Synthesis of Aziridine Compatibilizer B

[0050] 1) Dissolve 200g of ethylene glycol dimethacrylate in 1000ml of dioxane solvent, maintain the system temperature at 25°C, slowly add 60g of 2-methylaziridine dropwise to the solvent at a flow rate of 14ml / h and stir , after the dropwise addition was completed, the reaction system was stirred at 25°C for 1 hour, then stirred at reflux at 50°C for 2 hours, and the solvent was removed by rotary evaporation at 100°C to obtain monomer C.

[0051] 2) The 1L autoclave was replaced with nitrogen for 4 times, 600ml of toluene was added to the kettle, and the temperature of the kettle was maintained at 80°C. Then, 90g of methyl methacrylate, 5.2g of methacrylic acid hydroxyl group were added dropwise to the kettle with a constant pressure dropping funnel A mixed solution of ethyl ester, 1.42g glycidyl methacrylate, 12.6g monomer C and 1g initiator azobisisobutyronitrile. After the dropwise addition, the reaction kettle was stirred...

Embodiment 2

[0053] 1) Weigh 50g PLA 2003D, 50g PBAT C1200, 0.5g aziridine compatibilizer A PZP-1000, 0.2g antioxidant 1010, place PLA and PBAT in a vacuum oven at 60°C for 4 hours for drying treatment;

[0054] 2) Add PBAT to Hapu RM-200C mixing platform and mix for 1 minute, then add PZP-1000, and mix for 2 minutes (temperature 170°C, rotor speed 50rpm);

[0055] 3) Add PLA, continue kneading for 4 minutes (temperature 170°C, rotor speed 50rpm), and finally add antioxidant 1010 to obtain PLA / PBAT alloy.

[0056] The obtained alloy was obtained by compression molding to obtain a sample bar, and the impact strength and melt index test were respectively carried out according to the ASTM D256 and ASTM D1238 standards, and the molecular weight test was carried out using gel permeation chromatography with tetrahydrofuran as the mobile phase (Shimadzu LC-20AD GPC, flow rate 1ml / min), the results are shown in Table 1.

Embodiment 3

[0058] According to Example 2, with other conditions unchanged, 0.8 g of aziridine compatibilizer B was added to the formula of Example 2 (compatibilizer B and compatibilizer A were added to the mixing platform). The test results are shown in Table 1.

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Abstract

The invention discloses a PLA / PBAT alloy material with high toughness and high melt strength and a preparation method thereof. The alloy material is composed of PLA, PBAT, aziridine compatibilizer A, aziridine compatibilizer B and antioxidant. The invention uses the aziridine compatibilizer to carry out step-by-step functionalization on the alloy material. In the first step, the aziridine compatibilizer and PBAT are reacted with controlled stoichiometry, and in the second step, PLA resin is added and blended to obtain the alloy material. The PLA / PBAT alloy prepared by the invention has the characteristics of high interface compatibility and high melt strength.

Description

technical field [0001] The invention belongs to the field of degradable polymer materials, and in particular relates to a PLA / PBAT alloy with high toughness and high melt strength based on an aziridine compatibilizer and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a renewable and biodegradable thermoplastic resin, and its polymerized monomer lactic acid can be obtained by biofermentation of renewable resources such as corn. Compared with traditional plastics based on petrochemicals, the production of polylactic acid has lower carbon dioxide emissions, and traditional plastics such as polyethylene and polypropylene cannot be degraded in the natural environment, causing plastic waste problems such as "white pollution" and affecting the ocean. Harmful effects on the environment and terrestrial ecology. Because of its degradability, PLA can replace traditional plastics and solve problems such as "white pollution". The mechanical propert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08L33/12C08K5/3412C08K5/134C08F220/14C08F220/20C08F220/32C08F220/36
CPCC08L67/04C08L67/02C08F220/14C08L2205/02C08L2205/03C08L2205/08C08K5/3412C08K5/1345C08L33/14
Inventor 古亮亮徐卓言亓玉翠张红陈海波
Owner WANHUA CHEM GRP CO LTD
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