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Wholly-degradable poly(propylene carbonate) compound film material and preparation thereof

A polypropylene carbonate and composite film technology, which is applied in the field of fully degradable polypropylene carbonate composite film material and its preparation, achieves the effects of less material consumption, easy realization, and improved mechanical properties

Inactive Publication Date: 2009-01-21
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to obtain polymer materials with excellent comprehensive properties, the blending modification of existing polymers has become an effective way to improve polymer performance and develop new polymer materials. Compound blending with other components can solve the problem of a single group performance deficiencies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Dissolve PPC and PLA in chloroform respectively to make solutions with mass fractions of 6% and 8%. Mix the two solutions at room temperature and thoroughly mix them evenly with ultrasonic waves. In the mixed solution, polypropylene carbonate and polypropylene The weight ratio of lactic acid is 9:1; after most of the solvent is evaporated at room temperature, the mixed solution is cast in a flat glass mold; vacuum dried at 40°C to constant mass, the PPC-PLA composite film material is obtained. The obtained composite film material was tested, and its glass transition temperature was 25°C, its tensile strength was 44Mpa, its Young's modulus was 521Mpa, and its degradation rate after six weeks of buried soil degradation was 6.4%.

Embodiment 2

[0019] Dissolve PPC and PLA in chloroform respectively to make solutions with mass fractions of 7% and 9%. Mix the two solutions at room temperature and mix them well with ultrasonic waves. The mixture contains polypropylene carbonate and polypropylene The weight ratio of lactic acid is 4:1; after removing most of the solvent by volatilization at room temperature, the mixed solution is cast in a flat glass mold; vacuum-dried at 40°C to constant mass, the PPC-PLA composite film material is obtained. The obtained composite film material is tested, and its glass transition temperature is 30°C, its tensile strength is 58Mpa, its Young's modulus is 928Mpa, and its degradation rate after 6 weeks of buried soil degradation is 7.2%.

Embodiment 3

[0021] Dissolve PPC and PLA in chloroform respectively to make solutions with mass fractions of 7% and 8%. Mix the two solutions at room temperature and thoroughly mix them evenly with ultrasonic waves. In the mixed solution, polypropylene carbonate and polypropylene The weight ratio of lactic acid is 7:3; after most of the solvent is volatilized at room temperature, the mixed solution is cast in a flat glass mold; vacuum-dried at 40°C to constant mass, the PPC-PLA composite film material is obtained. The obtained composite film material was tested, and its glass transition temperature was 35°C, its tensile strength was 36Mpa, its Young's modulus was 1751Mpa, and its degradation rate after six weeks of soil burial was 17.1%.

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Abstract

The invention discloses a completely-degradable poly (propylene carbonate) composite film material and a preparation method thereof. The composite film material is formed by blending and compounding poly (propylene carbonate) with polylactic acid, wherein the content of the polylactic acid is between 10 and 50 weight percent, and the content of the poly (propylene carbonate) is between 50 and 90 weight percent. The preparation method comprises the following steps that: the poly (propylene carbonate) and the polylactic acid are respectively dissolved in organic solvents and made into solutions; the two solutions are well mixed pro rata and volatilized at room temperature so as to eliminate most of the solvents, and then mixed liquid is cast in a plate glass mold; and after the mixed liquid is vacuum-dried to constant mass, a PPC-PLA composite film material can be obtained. The composite film material provided by the invention obviously improves the properties of the poly (propylene carbonate), effectively solves the increasingly serious white pollution problem, and has important significance for ecological environment protection. The preparation method is simple in process, convenient to operate, easy to realize, low in equipment dependence and little in material consumption.

Description

technical field [0001] The invention relates to a composite film material and a preparation method thereof, in particular to a fully degradable polypropylene carbonate composite film material prepared by compounding polypropylene carbonate and polylactic acid as raw materials and a preparation method thereof. Background technique [0002] Aliphatic polycarbonates prepared from carbon dioxide are a class of polymers with biodegradable properties. Due to the use of carbon dioxide gas that pollutes the atmosphere in the synthetic raw materials of aliphatic polycarbonate, the occurrence of "greenhouse effect" is avoided, and it belongs to waste recycling; at the same time, aliphatic polycarbonate itself has biodegradable characteristics. It can solve the "white pollution" problem that plagues the world, so it has very important social benefits and environmental protection values. After decades of hard work, the synthetic catalytic technology of polypropylene carbonate (PPC), a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/04C08J5/18
Inventor 卢凌彬林强张亚男庞素娟潘莉莎曹阳刘慧宏
Owner HAINAN UNIVERSITY
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