A kind of high toughness and high transparency polylactic acid and preparation method thereof
A technology of polylactic acid and high toughness, which is applied in the field of preparation of high toughness and high transparency polylactic acid, can solve the problems of intensifying visible light scattering and reducing the transparency of products, and achieves low requirements for preparation equipment, high strength, and simple and effective preparation methods Effect
Inactive Publication Date: 2019-04-19
EAST CHINA UNIV OF TECH
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Problems solved by technology
Secondly, polylactic acid blends will intensify visible light scattering and reduce the transparency of products
Method used
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Embodiment 1~5
[0034] Measure polylactic acid and chloroform (solvent) according to Example 1 to Example 5 in Table 1, mix and dissolve to prepare a polylactic acid solution, scrape the film on a glass plate, and place it in ethanol (non-solvent) at different temperatures to obtain a solution containing Polylactic acid with holes.
[0035] After vacuum drying to remove residual solvents and non-solvents, tensile test samples were prepared with dumbbell-shaped cutters. Tensile properties were tested using a universal testing machine. The test temperature is 25°C, the relative humidity is 40%, and the tensile speed is 5mm / min. The test results are shown in Table 1.
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Abstract
The invention discloses a high-toughness and high-transparency polylactic acid and a preparation method thereof. The high-toughness and high-transparency polylactic acid contains nanometer holes inside. The polylactic acid solution obtains nanopores by phase separation in a non-solvent at a certain temperature. The mass ratio of the polylactic acid solution is 10-30 parts of polylactic acid, 70-90 parts of solvent; the temperature of the non-solvent is -80-45°C. The method adopted in the present invention is simple and effective, does not need to add any other materials, such as modifiers, compatibilizers, etc., and uses the nanopores obtained by phase separation to achieve high toughness and high transparency of polylactic acid and maintain high strength. The comprehensive performance of polylactic acid is improved, and the application range of polylactic acid can be expanded.
Description
technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a preparation method of high-toughness and high-transparency polylactic acid. And claim the priority of the Chinese patent application with the application date of March 11, 2016 and the application number CN201610137418.6. Background technique [0002] Polylactic acid is synthesized from renewable resources and is a promising biodegradable thermoplastic polymer material. Polylactic acid has the characteristics of high mechanical strength and excellent processing performance, and is expected to replace petroleum-based polymer materials in many fields. A significant disadvantage of polylactic acid is its high brittleness and poor toughness, which limit its application range. In order to improve the toughness of polylactic acid, the commonly used methods are copolymerization, plasticization or blending, that is, the purpose of toughening polylacti...
Claims
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IPC IPC(8): C08J9/26C08L67/04
CPCC08J9/26C08J2367/04C08L67/04C08L2201/10
Inventor 那兵吕瑞华汪斌柳和生
Owner EAST CHINA UNIV OF TECH
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