Degradable aliphatic polycarbonate compound film material and preparation thereof

A family of polycarbonate and composite film technology, applied in the field of degradable aliphatic polycarbonate composite film materials and its preparation, to achieve the effects of improved mechanical properties, simple process, and reduced material costs

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 im

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve PPC and PEG with a molecular weight of 4000 in chloroform to form solutions with a mass fraction of 6% and 8%, respectively. Mix the two solutions at room temperature and mix them well with ultrasonic waves. The polycarbonate in the mixed solution The weight ratio of propyl ester to polyethylene glycol is 1.5:1; 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 a constant mass to obtain a PPC-PEG composite film material. The obtained composite film material was tested, and its glass transition temperature was 48°C, its tensile strength was 23.00Mpa, its degradation rate in pH=5.5 buffer solution was 24.66% in 60 days, and its degradation rate in tap water at pH=7.9 was 19.80% in 60 days. The degradation rate after three months was 47.32%.

Embodiment 2

[0020] Dissolve PPC and PEG with a molecular weight of 6000 in chloroform to form solutions with mass fractions of 7% and 9%, respectively. Mix these two solutions at room temperature and mix them well with ultrasonic waves. The polycarbonate in the mixed solution The weight ratio of propyl ester to polyethylene glycol is 1.5:1; 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 a constant mass to obtain a PPC-PEG composite film material. The obtained composite film material was tested, and its glass transition temperature was 51°C, its tensile strength was 23.78Mpa, its degradation rate in pH=5.5 buffer solution was 21.65% in 60 days, and its degradation rate in tap water at pH=7.9 was 66.61%. The degradation rate after three months was 55.82%.

Embodiment 3

[0022] Dissolve PPC and PEG with a molecular weight of 8000 in chloroform to form solutions with mass fractions of 6% and 8%, respectively. Mix these two solutions at room temperature and mix them well with ultrasonic waves. The polycarbonate in the mixed solution The weight ratio of propyl ester to polyethylene glycol is 2:1; 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 a constant mass to obtain a PPC-PEG composite film material. The obtained composite film material was tested, and its glass transition temperature was 50°C, its tensile strength was 24.63Mpa, its degradation rate in 60 days in pH=5.5 buffer solution was 42.10%, and its degradation rate in 60 days in tap water at pH=7.9 was 32.77%. The degradation rate after three months was 52.50%.

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Abstract

The invention discloses a degradable aliphatic polycarbonate composite film material and a preparation method thereof. The composite film material is formed by blending and compounding poly (propylene carbonate) with polyethylene glycol, wherein the content of polyethylene glycol is 20 to 60 weight percent, and the content of the poly (propylene carbonate) is between 40 and 80 weight percent. The preparation method comprises the following steps that: the poly (propylene carbonate) and the polyethylene glycol 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-PEG 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 degradable aliphatic polycarbonate composite film material and a preparation method thereof, in particular to a degradable aliphatic polycarbonate composite film material prepared by compounding polypropylene carbonate and polyethylene glycol as raw materials and its preparation method. 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 polyp...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L71/08C08J5/18
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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