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Polylactic acid/polyester alloy and preparation method thereof

A technology of polyester alloy and polylactic acid, which is applied in the field of polymers, can solve the problems of unstable phase structure, difficult to meet, toughness, rigidity, heat resistance and other problems, so as to avoid design difficulty and reduce investment cost.

Active Publication Date: 2015-05-06
FINE BLEND POLYMER SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that toughness, rigidity, and heat resistance are difficult to balance in the modification process of polylactic acid. The multi-element alloy obtained by simple compatibilization treatment has unstable phase structure and is difficult to meet higher requirements. need

Method used

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  • Polylactic acid/polyester alloy and preparation method thereof
  • Polylactic acid/polyester alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1000g each of PLA and PC, dried at 80°C for 2h, compatibilizer (styrene-butadiene-acrylonitrile-GMA) 300g, antioxidant (168 / 1010) 60g, lubricant (TAF) 40g, using the above extrusion After mixing the above raw materials for 3 to 5 minutes in a high-speed mixer, they were respectively put into a two-stage extruder with an ultrasonic treatment power of 400W, extruded and granulated to obtain sample 4, and the granules were dried at 90°C for 3 hours, and then injection molded into samples. strip, test.

Embodiment 2

[0031] PLA 800g and PC 1200g, dried at 80°C for 2h, compatibilizer (styrene-butadiene-acrylonitrile-GMA) 300g, antioxidant (168 / 1010) 60g, lubricant (TAF) 40g, using the above Extrusion process, the above raw materials are mixed by a high-speed mixer for 3 to 5 minutes, and then put into a two-stage extruder respectively, with an ultrasonic treatment power of 500W, extruded and granulated to obtain sample 5, and the particles are dried at 90°C for 3 hours, and then injection molded into Spline, test.

Embodiment 3

[0033] PLA 1400g and PC 600g, dried at 80°C for 2h, compatibilizer (styrene-butadiene-acrylonitrile-GMA) 600g, antioxidant (168 / 1010) 60g, lubricant (TAF) 40g, using the above Extrusion process, the above raw materials are mixed by a high-speed mixer for 3 to 5 minutes, and then put into a two-stage extruder respectively, with an ultrasonic treatment power of 350W, extruded and granulated to obtain sample 6, and the granules are dried at 90°C for 3 hours, and then injection molded into Spline, test.

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Abstract

The invention relates to a polylactic acid / polyester alloy and a preparation method thereof. The polylactic acid / polyester alloy comprises the following components in percentage by weight: polylactic acid, polyester, a compatilizer, a flexibilizer, an antioxidant and a lubricant. The preparation method comprises the following steps: firstly, proportioning the raw materials and mixing at a room temperature; and respectively carrying out melting extrusion, carrying out ultrasonic treatment at the first late stage, extruding at the second stage and pelletizing, so as to obtain degradable, high-impact-resistant and high-heat-resistant polylactic acid / polyester alloy. Compared with an existing method, the controllable ultrasonic treatment is utilized; and a similar polylactic acid-g-polyester structure is formed by in-situ reaction, so that the heat resistance of the polyester and the biodegradability of the polylactic acid are reserved; and meanwhile, a toughening system with a core-shell structure is formed in an alloy system through interface interaction of a special toughening compatilizer, so that the alloy product with high impact resistance, high heat resistance and high biodegradability can be obtained.

Description

technical field [0001] The invention belongs to the field of macromolecules, and relates to a degradable, high-impact-resistant, high-heat-resistant polylactic acid / polyester alloy and a preparation method thereof. Background technique [0002] With the development of science and technology and the times, the modification or alloying of polymer materials has been widely used as an inevitable means; at the same time, with the development of the times, people pay more and more attention to green environmental protection. Polylactic acid is a polymer obtained by polymerizing lactic acid as the main raw material. The raw material source is sufficient and can be regenerated. The production process of polylactic acid is non-polluting, and the product can be biodegraded to realize the cycle in nature, so it is an ideal green polymer material. Polylactic acid can be used in many fields such as extrusion, injection molding, film drawing, spinning, etc., but the shortcomings of polyl...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L67/04C08L55/02C08K13/02C08K5/098C08K5/20B29B9/06B29C47/40B29C47/08
CPCC08L67/04C08L69/00C08L2201/06C08L2201/08C08L2205/03C08L55/02C08K5/1345C08K5/526
Inventor 段浩李昌鸿杨威汤俊杰齐阳城
Owner FINE BLEND POLYMER SHANGHAI CO LTD
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