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Method for preparing flexible biodegradable polytrimethylene carbonate composite film

A technology of polypropylene carbonate and composite film, which is applied in the field of composite film and its preparation, can solve the problems that limit the practical application of composite materials, achieve good blown film stability, good mechanical properties, improve brittleness and low temperature viscous flow problems Effect

Active Publication Date: 2011-08-17
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhang Zhihao, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, etc. prepared maleic anhydride-terminated polypropylene carbonate / ethyl cellulose blend (MAPPC / EC) by solution casting. Ethyl cellulose (EC) is a semi-rigid thermotropic The ethyl group endows the EC side chain with flexibility, lyotropicity and thermotropicity; the glucose unit endows EC with heat resistance and semi-rigidity, and maleic anhydride-capped polypropylene carbonate (MAPPC) can improve the thermal stability of PPC However, the preparation of MAPPC / EC films by solution casting requires the recovery of a large amount of solvent, which limits the practical application of this composite material.

Method used

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  • Method for preparing flexible biodegradable polytrimethylene carbonate composite film
  • Method for preparing flexible biodegradable polytrimethylene carbonate composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Take each component by the following parts by weight:

[0052] PPC60

[0053] TPU40

[0054] Diisocyanate 0.2

[0055] Antioxidant 1010 0.3

[0056] Nano silica 1

[0057] Triphenyl phosphite 0.2

[0058] Erucamide 1

[0059] Nano calcium carbonate 5

[0060] Oxalic acid 0.5

[0061] Benzoin monoalkyl ether 0.2

[0062] The preparation process is as follows:

[0063] The raw materials were dried in an oven at 45°C for 6 hours, then mixed in a high-speed mixer for 0.5-1 minute at high speed, and then entered into an internal mixer at a temperature of 135°C for blending and granulation.

[0064] Then use the pellets for blow molding into film, the processing technology is as follows: Extrude by plastic melting extruder for blow molding

[0065] Extruder aspect ratio: 40:1

[0066] The temperature settings are as follows:

[0067] Zone 1: 105°C

[0068] Zone 2: 130°C

[0069] Zone 3: 145°C

[0070] Die head: 140°C

[0071] The material is fed from the hopper,...

Embodiment 2

[0080] Take each component by the following parts by weight:

[0081] PPC 70

[0082] TPU 30

[0083] Diisocyanate 0.2

[0084] Antioxidant 1010 0.3

[0085] Zinc oxide 0.5

[0086] Triphenyl phosphite 0.2

[0087] Erucamide 1

[0088] Nano calcium carbonate 3

[0089] Oxalic acid 0.5

[0090] Benzoin monoalkyl ether 0.2

[0091] The preparation process is as follows:

[0092] The raw materials were dried in an oven at 45°C for 6 hours, then mixed in a high-speed mixer for 0.5-1 minute at high speed, and then entered into a twin-screw extruder at 135°C for extrusion and granulation.

[0093] Then use the pellets for blow molding into film, the processing technology is as follows: Extrude by plastic melting extruder for blow molding

[0094] Extruder aspect ratio: 40:1

[0095] The temperature settings are as follows:

[0096] Zone 1: 105°C

[0097] Zone 2: 140°C

[0098] Zone 3: 145°C

[0099] Die head: 140°C

[0100] The material is fed from the hopper, and th...

Embodiment 3

[0109] Take each component by the following parts by weight:

[0110] PPC 80

[0111] TPU 20

[0112] Diisocyanate 0.1

[0113] Antioxidant 1010 0.3

[0114] Montmorillonite 1

[0115] Triphenyl phosphite 0.2

[0116] Erucamide 1

[0117] Nano calcium carbonate 5

[0118] Oxalic acid 0.5

[0119] Benzoin monoalkyl ether 0.2

[0120] The preparation process is as follows:

[0121] The raw materials were dried in an oven at 45°C for 6 hours, then mixed in a high-speed mixer for 0.5-1 minute at high speed, and then entered into a twin-screw extruder at 130°C for extrusion and granulation.

[0122] Then use the pellets for blow molding into film, the processing technology is as follows: Extrude by plastic melting extruder for blow molding

[0123] Extruder aspect ratio: 40:1

[0124] The temperature settings are as follows:

[0125] Zone 1: 105°C

[0126] Zone 2: 130°C

[0127] Zone 3: 145°C

[0128] Die head: 150°C

[0129] The material is fed from the hopper, and...

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Abstract

The invention discloses a flexible biodegradable polytrimethylene carbonate composite film and a preparation method thereof. The composite film is formed by blowing a film after melting and mixing polytrimethylene carbonate, thermoplastic polyurethane elastomers, a bulking agent, antioxygen, a heat resistant stabilizing agent, a slipping agent, an antiblocking agent, a filling agent, a biodegradation accelerating agent and a light decomposition agent. In the invention, PPC and elastomers TPU are effectively compounded, thereby solving the problems of brittleness and low-temperature viscous flow of materials; the processing temperature of unsealed PPC is expanded to 170 DEG C, and the thermal degradation temperature is improved to 210 DEG C. Meanwhile, the composite film has good mechanical property and film blowing stability, can be applied to the fields of soft film materials, such as disposable shopping bags, land films, preservative films, and the like, and opens a new approach forthe popularization and the application of PPC.

Description

technical field [0001] The invention relates to a composite film and a preparation method thereof, in particular to a biodegradable polypropylene carbonate (PPC) / thermoplastic polyurethane (TPU) composite flexible film material and a preparation method thereof. technical background [0002] CO 2 It is considered to be the "culprit" of the global warming effect. However, CO 2 As a carbon resource, its effective utilization has been widely concerned because of its low price and wide range of sources. carbon dioxide (CO 2 ) and propylene oxide (PO) are polymerized into fully biodegradable plastic polypropylene carbonate (PPC), which is a comprehensive utilization of CO on a large scale. 2 Opens up an important pathway and can reduce CO 2 concentrated emissions. At the same time, it also effectively saves oil resources, which is a breakthrough in the resource chemical industry. However, PPC is an amorphous structure with relatively flexible molecular chains and small inte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L75/04C08K5/29C08K5/07B29C55/28B29B13/06B29B7/00
Inventor 林强傅送保潘莉莎王国忠徐鼎陈科宇卢凌彬王亮亮刘慧宏徐建波庞素娟陈步宁曹阳
Owner CHINA NAT OFFSHORE OIL CORP
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