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Polylactic acid/chemically modified natural rubber blend material and preparing method thereof

A chemically modified, natural rubber technology, applied in the field of polylactic acid/chemically modified natural rubber blend materials and their preparation, can solve problems such as poor toughness and poor ductility, and achieve excellent elongation at break and excellent impact resistance. the effect of strength

Inactive Publication Date: 2017-02-01
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of poor toughness and poor ductility of polylactic acid materials in the prior art

Method used

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  • Polylactic acid/chemically modified natural rubber blend material and preparing method thereof
  • Polylactic acid/chemically modified natural rubber blend material and preparing method thereof
  • Polylactic acid/chemically modified natural rubber blend material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 94.0wt% polylactic acid, 5.0wt% glycidyl methacrylate chemically modified natural rubber (polyglycidyl methacrylate graft content is 2.0wt%), 0.2wt% antioxidant 1010 in Mix in a high-speed mixer, add to a Hakke internal mixer, melt and blend at 140-160°C, rotate at a speed of 40rpm, and mix for 10 minutes, then add 0.2wt% vulcanizing agent dicumyl peroxide, rotate at a speed of 30rpm, and continue mixing Take it out after 10 minutes, prepare a standard sample of polylactic acid / chemically modified natural rubber blend material by molding at 160-180° C., and measure the mechanical properties of the sample. The tensile strength was 50.7 MPa, the elongation at break was 52%, the notched impact strength was 15.6 MPa, and the unnotched impact strength was 34.4 MPa.

Embodiment 2

[0024] Put 90.0wt% polylactic acid, 9.0wt% glycidyl methacrylate chemically modified natural rubber (polyglycidyl methacrylate graft content is 2.5wt%), 0.5wt% antioxidant 1010 in Mix in a high-speed mixer, add to a Hakke internal mixer, melt and blend at 140-160°C, speed 40rpm, mixing time 10min, then add 0.5wt% vulcanizing agent dicumyl peroxide, speed 30rpm, continue mixing Take it out after 10 minutes, prepare a standard sample of polylactic acid / chemically modified natural rubber blend material by molding at 160-180° C., and measure the mechanical properties of the sample. The tensile strength was 47.5MPa, the elongation at break was 116%, the notched impact strength was 30.7MPa, and the unnotched impact strength was 112.8MPa.

Embodiment 3

[0026] Put 85.0wt% polylactic acid, 13.5wt% glycidyl methacrylate chemically modified natural rubber (polyglycidyl methacrylate graft content is 4.5wt%), 0.5wt% antioxidant 1010 in Mix in a high-speed mixer, add to a Hakke internal mixer, melt and blend at 130-160°C, rotate at 100rpm, mix for 10min, then add 1.0wt% vulcanizing agent dicumyl peroxide, rotate at 45rpm, and continue mixing Take it out after 10 minutes, and prepare a standard sample of polylactic acid / chemically modified natural rubber blend material by molding at 160-180° C., and measure its mechanical and mechanical properties. The tensile strength was 42.6MPa, the elongation at break was 142%, the notched impact strength was 43.4MPa, and the unnotched impact strength was 117.3MPa.

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Abstract

The invention relates to a polylactic acid / chemically modified natural rubber blend material and a preparing method thereof. The polylactic acid / chemically modified natural rubber blend material is mainly prepared from 30.0-94.6 wt% of polylactic resin, 5.0-66.0 wt% of glycidyl methacrylate chemically modified natural rubber, 0.2-2.0 wt% of vulcanizing agent and 0.2-2.0 wt% of antioxygen. According to the glycidyl methacrylate chemically modified natural rubber, the interfacial adhesive action between the polylactic acid and the modified natural rubber is improved through reactive compatibilization, and the polylactic acid is subjected to toughening modification through dynamic vulcanization of the modified natural rubber, thus tenacity and ductility of polylactic acid material can be improved greatly and the polylactic acid / chemically modified natural rubber blend material is obtained. The polylactic acid / chemically modified natural rubber blend material has an excellent mechanical property, which shows not only excellent impact strength but also excellent elongation at break, and thus the polylactic acid / chemically modified natural rubber blend material can be applied to the field of high polymer materials of packaging, electronic appliances, automobile industry and the like.

Description

technical field [0001] The invention relates to a polylactic acid modified material, in particular to a polylactic acid / chemically modified natural rubber blend material and a preparation method thereof. Background technique [0002] In the 21st century, with the intensification of the energy crisis in human society and the increasing awareness of environmental protection, the application of biodegradable materials and bio-based polymers in the field of polymers has gradually attracted attention. Polylactic acid (PLA) is a biodegradable polyester polymer material with excellent biocompatibility. At present, polylactic acid has been widely used in biomedicine, such as surgical lines, drug delivery systems, etc. Polylactic acid is a completely biodegradable material, which meets the needs of sustainable development of the environment at home and abroad. Polylactic acid has good mechanical properties and processability. As the price of polylactic acid in the market becomes mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/04C08K5/134C08K5/14
CPCC08L51/04C08L67/04C08K5/1345C08K5/14
Inventor 吴宁晶张红付国良
Owner QINGDAO UNIV OF SCI & TECH
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