Polyester/thermoplastic starch biodegradable composition and preparation method thereof

A thermoplastic starch and biodegradable technology, applied in the field of biodegradable materials, can solve the problems of low cost, narrow application range, and low strength of the composition, and achieve the effects of reduced production cost, good mechanical properties and flexibility, and simple processing and operation

Inactive Publication Date: 2014-04-02
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used modification method is to blend cheap thermoplastic starch with PBAT to make a film, which is not only low in cost but also fully biodegradable, such as the technical solution provided in the patent CN1946777, which can be simply blended with thermoplastic starch Although the blend composition prepared by the modification method can reduce the cost, the strength of the obtained composition is often very low, and the application range is very narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Dry PBAT (weight-average molecular weight: 125,000), thermoplastic cornstarch, and polyvinyl butyral (weight-average molecular weight: 30,000) in a blast oven at 60°C for 24 hours, and set aside;

[0036] (2) Weigh 90 parts of PBAT, 5 parts of thermoplastic corn starch, 10 parts of polyvinyl butyral, 0.1 parts of compatibilizer maleic anhydride, 0.2 parts of erucamide, and 0.1 parts of antioxidant 1010 in a high mixer Mix at room temperature for 5 minutes and mix evenly; put the mixture into a twin-screw machine to extrude and granulate to obtain a polyester / thermoplastic starch biodegradable composition. The relevant mechanical properties are shown in Table 1.

[0037] Among them, the temperature of each zone of the twin-screw machine is: 140°C in the first zone, 150°C in the second zone, 160°C in the third zone, 165°C in the fourth zone, 170°C in the fifth zone, 170°C in the sixth zone, 170°C in the seventh zone, 170°C in the eighth zone, and 170°C in the ninth zon...

Embodiment 2

[0039] (1) Dry PBAT (weight-average molecular weight: 28,000), thermoplastic tapioca starch, and polyvinyl butyral (weight-average molecular weight: 45,000) in a blast oven at 80°C for 8 hours, and set aside;

[0040] (2) Weigh 60 parts of PBAT, 20 parts of thermoplastic corn starch, 40 parts of polyvinyl butyral, 1 part of compatibilizer ethylene-vinyl acetate copolymer hydrolyzate EVOH, 2 parts of calcium stearate, 2 parts of anti- Oxygen 168 was mixed in a high-speed mixer at room temperature for 10 minutes. After mixing evenly, the mixture was added to a twin-screw machine for extrusion and granulation to obtain a polyester / thermoplastic starch biodegradable composition. The relevant mechanical properties are shown in Table 1.

[0041] Among them, the temperature of each zone of the twin-screw machine is: 145°C in the first zone, 155°C in the second zone, 165°C in the third zone, 170°C in the fourth zone, 175°C in the fifth zone, 175°C in the sixth zone, 175°C in the sevent...

Embodiment 3

[0043] (1) Dry PBAT (weight average molecular weight 100,000), thermoplastic potato starch, and polyvinyl butyral (weight average molecular weight 45,000) in a blast oven at 70°C for 12 hours, and set aside;

[0044] (2) Weigh 10 parts of PBAT, 10 parts of thermoplastic corn starch, 80 parts of polyvinyl butyral, 5 parts of compatibilizer POE-g-MAH, 3 parts of sodium stearate, 3 parts of antioxidant 2246 in high Mix in a mixer at room temperature for 5 minutes, and mix evenly; add the mixture to a twin-screw machine for extrusion and granulation to obtain a polyester / thermoplastic starch biodegradable composition, and its related mechanical properties are shown in Table 1.

[0045]Among them, the temperature of each zone of the twin-screw machine is: 140°C in the first zone, 150°C in the second zone, 160°C in the third zone, 165°C in the fourth zone, 170°C in the fifth zone, 170°C in the sixth zone, 170°C in the seventh zone, 170°C in the eighth zone, and 170°C in the ninth zon...

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PUM

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Abstract

The invention belongs to the technical field of biodegradable materials, and relates to a polyester / thermoplastic starch biodegradable composition and a preparation method thereof. The polyester / thermoplastic starch biodegradable composition is prepared from the following components in parts by weight: 10-90 parts of aliphatic-aromatic copolyester, 5-40 parts of thermoplastic starch, 10-80 parts of polyvinyl butyral, 0.1-5 parts of a compatibilizer, 0-3 parts of a lubricant, and 0-3 parts of an antioxidant. The preparation cost of the composition can be greatly reduced, and thus the product competitiveness is improved; and moreover, polyvinyl butyral not only has relatively good transparency, elasticity and degradation property but also has quite good anti-impact property and tensile strength, so the composition prepared from polyvinyl butyral has quite good mechanical properties and flexibility, can be completely biodegraded, and can be widely applied in packaging materials, disposable tableware and other consumer good fields.

Description

technical field [0001] The invention belongs to the technical field of biodegradable materials, and relates to a polyester / thermoplastic starch biodegradable composition and a preparation method thereof. Background technique [0002] The use of plastic film has penetrated into all areas of people's lives, and is widely used as food packaging, electronic and electrical product packaging, shopping bags, garbage bags, etc. The raw materials of traditional plastic film materials such as polypropylene (PP) film and polyethylene (PE) film are petroleum, which are difficult to degrade when discarded in nature after use, causing great harm to the environment. With the depletion of petroleum resources and the continuous enhancement of people's awareness of environmental protection, the development of fully degradable and environmentally friendly polymer materials used in the field of thin film materials has become the mainstream of future development. [0003] Poly(butylene terephth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08L29/14C08L51/06C08L23/08B29B9/06B29C47/92B29C48/92
CPCB29C48/40B29C48/625B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 袁角亮
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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