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Polylactic acid-polyalkylene glycol copolymer with fast crystallization rate and composition containing same

A polyalkylene glycol copolymer and polyalkylene glycol technology are applied in the field of polylactic acid-polyalkylene glycol copolymers with fast crystallization speed and compositions containing the same, and can solve the problem of The problems of crystallinity and crystallization speed, reduction of crystallinity, and long reaction time are not mentioned, so as to achieve the effect of excellent injection molding, high crystallinity, and easy injection molding

Active Publication Date: 2018-06-26
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of forming a copolymer by polymerization, the reaction time is long, a large amount of organic solvent harmful to the human body is used, and it is inconvenient to finely adjust the reaction conditions.
In addition, the degree of crystallization and the rate of crystallization are not mentioned at all. The purpose of the invention is to impart flexibility in the production of polylactic acid films, and there is a problem that the degree of crystallization decreases due to the use of a high content of polyethylene glycol.

Method used

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  • Polylactic acid-polyalkylene glycol copolymer with fast crystallization rate and composition containing same
  • Polylactic acid-polyalkylene glycol copolymer with fast crystallization rate and composition containing same
  • Polylactic acid-polyalkylene glycol copolymer with fast crystallization rate and composition containing same

Examples

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Embodiment approach

[0042] Hereinafter, the present invention will be described in more detail by the following Examples and Comparative Examples. However, these are merely examples of the present invention, and the scope of the present invention is not limited to these.

[0043]

[0044] Materials, production methods, spray methods, and property measurement methods used in Examples and Comparative Examples are as follows.

[0045] (1) Polylactic acid resin

[0046] As the L-polylactic acid resin, 4032D, 3001D, 3251D manufactured by NatureWorks LLC were used

[0047] (2) Polyalkylene glycol

[0048] As the polyalkylene glycol, those manufactured by HAJIN CHEMTECH, NAGASE CHEMTECH, Aldrich, etc. whose terminals were modified with epoxy groups were used.

[0049] (3) Manufacturing method

[0050] The polylactic acid, the polyalkylene glycol, and the selective crystallization nucleating agent are melt-mixed using a twin-screw extruder. At this time, polyalkylene glycol is injected into an ext...

Embodiment 1～2 and comparative example 1～3

[0075] The compositions and properties of the respective compositions of Examples 1 to 2 and Comparative Examples 1 to 3 are shown in Table 1 below.

[0076] In Examples 1 to 2 and Comparative Examples 1 to 3 shown in Table 1 below, after mixing the components and contents according to the compositions shown in Table 1 below, they were extruded by melt-kneading at 190° C. in a twin-screw extruder. processing. After drying the pellet samples at 80°C for more than 4 hours, the temperature of the injection mold was maintained at 110°C, injection molding was performed, and after standing at room temperature for 24 hours, the properties of the test pieces were measured as described above, and the results are shown in the following table. 1.

[0077] [Table 1]

[0078]

[0079] Note: (1) A: Polylactic acid: Trade name: LLC 3251D, manufactured by NatureWorks

[0080] (2) B-1: Polyalkylene glycol with a weight-average molecular weight of 1,000 g / mol modified with an epoxy group ...

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Abstract

The present invention relates to a polylactic acid-polyalkylene glycol copolymer having an excellent crystallization rate, and a composition containing the same. The polylactic acid-polyalkylene glycol copolymer of the present invention, prepared by melt-reacting polylactic acid with polyalkylene glycol of which a terminal has been modified with an epoxy group is environmentally friendly, facilitates injection molding, and has excellent thermal resistance, and thus is applicable to a variety of molded products requiring thermal resistance such as disposables, kitchen utensils, electric-electronic parts and automobile parts.

Description

【Technical field】 [0001] The present invention relates to a polylactic acid-polyalkylene glycol copolymer and a composition thereof, and more particularly to a polylactic acid-polyalkylene glycol copolymer having a fast crystallization rate and excellent processability and heat resistance and compositions containing the same. 【Background technique】 [0002] A considerable number of petroleum-derived plastics have applications ranging from necessities to aerospace materials due to the ease of control of mechanical properties and thermal stability. However, when these plastics are discarded into the environment, they accumulate without being decomposed. In addition, when the plastic waste is incinerated, harmful by-products and a large amount of carbon dioxide are discharged, which accelerates environmental pollution and the globalization of a wet room. [0003] Due to such environmental problems, research on environmentally friendly plastics, that is, plastics composed of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/18C08G63/66C08G65/00C08L67/04
CPCC08G63/664C08G65/331C08G65/3322C08L71/02C08L67/04
Inventor 金完根李度勳
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD