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Bio-based epoxy compound compatibilized and modified PLA/PBAT composite material and preparation method thereof

A technology of epoxy compounds and composite materials, applied in the directions of bio-packaging, climate sustainability, sustainable manufacturing/processing, etc., can solve the high synthesis cost of block copolymers, the inability of large-scale industrial production of compatibilizers, and the synthesis process Complicated problems, to achieve the effect of improving mechanical properties, high value, and simple process

Active Publication Date: 2022-05-27
BEIJING UNIV OF CHEM TECH
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  • Abstract
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Problems solved by technology

[0005] Although the use of bio-based block copolymers to achieve compatibilization of PLA / PBAT composites in the above studies will bring certain compatibilization effects to the composites, the synthesis cost of block copolymers is high and the synthesis process is complicated. The current large-scale synthesis of bio-based block copolymer compatibilizers cannot be mass-produced

Method used

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  • Bio-based epoxy compound compatibilized and modified PLA/PBAT composite material and preparation method thereof
  • Bio-based epoxy compound compatibilized and modified PLA/PBAT composite material and preparation method thereof
  • Bio-based epoxy compound compatibilized and modified PLA/PBAT composite material and preparation method thereof

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Experimental program
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Embodiment 1

[0046] Preparation of polyester elastomer compatibilized PLA / PBAT composites:

[0047] The PLA and PBAT pellets were dried in a vacuum oven at 60°C for 24 hours before use. Dried PLA and PBAT were mixed by Haake Remix (Remix 600p, Thermo Scientific Co., Germany) in a mass ratio of 70 / 30 at 200°C at 60 rpm and 0 phr, 0.5 phr for 10 minutes. During mixing, 1 phr, 3 phr, 5 phr, 7 phr, 9 phr of ESO were introduced into the mixture. The samples were injection-molded at 190 °C by an experimental micro-injection molding machine (WZS10D, Shanghai Xinshuo Precision Machinery Co., Ltd.), and prepared as samples for use.

[0048] Table 1. Thermodynamic characterization data of PLA, PBAT and PLA / PBAT composites before and after compatibilization

[0049]

[0050] The thermodynamic performance test results of PLA, PBAT and PLA / PBAT composites before and after compatibilization modification are listed in Table 1. It can be seen that when ESO is added, the Tg (DSC) of PLA decreases sign...

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Abstract

The invention belongs to the field of high polymer materials, and provides a bio-based epoxy compound compatibilized and modified PLA / PBAT composite material, a polyfunctional bio-based epoxy compound is adopted to compatibilize and modify the PLA / PBAT composite material, the compatibility of PLA and PBAT phases in the composite material is improved, the phase interface adhesiveness is enhanced, and the interfacial force is improved. And finally, the optimal complementation of the mechanical properties of the PLA phase and the PBAT phase is realized, and the mechanical properties of the composite material are effectively improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a bio-based epoxy compound compatibilized modified PLA / PBAT composite material and a preparation method. Background technique [0002] In the field of plastics, polylactic acid (PLA) and polybutylene adipate-butylene terephthalate (PBAT) are often melt-blended to prepare biodegradable composite materials for application. In composite materials, PLA The strength of PLA can effectively make up for the flexibility and low modulus of PBAT, and the presence of PBAT can also effectively toughen PLA, thereby preparing the best performance material with both rigidity and toughness. However, so far, studies have found that the composite materials prepared by PLA and PBAT have the characteristics of poor compatibility, which is prone to microscopic phase separation, resulting in poor complementarity of the mechanical properties of the two materials. [0003] In the current res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L91/00
CPCC08L67/04C08L2205/08C08L2205/03C08L2205/02C08L2205/05C08L67/02C08L91/00Y02W90/10
Inventor 王朝韩奕张立群
Owner BEIJING UNIV OF CHEM TECH
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