Aliphatic polycarbonate alloy material

A polycarbonate and alloy material technology, applied in the direction of conjugated synthetic polymer rayon, cellulose/protein conjugated rayon, etc., can solve the problem that the heat resistance temperature of PPC and the high temperature of blend materials cannot be fundamentally improved. Poor performance, insufficient low temperature toughness and other problems, to achieve the effect of improving compatibility and interface of two phases, increasing thermal degradation temperature, and improving performance

Active Publication Date: 2011-08-17
南通九思医疗器械有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent No. 4912149 blends polyvinyl acetate (PVAc) with PPC. After blending, the material strength is significantly improved, but PVAc itself is also an amorphous polymer with a low glass transition temperature, which cannot fundamentally improve the heat resistance temperature of PPC.
Japanese Patent No. 2008-284212 prepared a PPC / PMMA / PVAc ternary blend. The physical and mechanical properties and heat resistance temperature of the blend were significantly improved, but the low temperature toughness was insufficient.
Chinese patent CN100378138C provides a method for improving the brittleness and cold flow of PPC by blending PPC and aliphatic polyester, but the high temperature performance of the prepared blended material is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] After PPC was dried in a vacuum oven at 45-50°C for 24 hours, and CAB was dried in a vacuum oven at 80°C for 24 hours, the PPC / CAB was weighed according to the mass ratio PPC / CAB=95g / 5g, mixed and stirred at room temperature and then added to the dense In the mixing machine, the temperature of the internal mixer is 190° C., the screw speed is set at 100 rpm, and the material is discharged after 5 minutes of internal mixing.

[0034] The above mixed sample was hot-pressed into a sheet with a thickness of 1mm in a hot press at 190°C, and the thermal stability was tested. Using the SII-TGA analyzer, in an air atmosphere, the heating rate was 20°C / min, and the temperature range was measured 50-550°C. see resultsfigure 1 The curve in (g) CAB / PPC=5 / 95.

Embodiment 2-7

[0036] PPC was dried in a vacuum oven at 45-50°C for 24 hours, CAB was dried in a vacuum oven at 80°C for 24 hours, and the samples were weighed according to the mass ratio of PPC / CAB shown in Table 1, mixed and stirred at room temperature and then added to the internal mixer In the process, the temperature of the internal mixer is 190°C, the screw speed is set at 100 rpm, and the material is discharged after 5 minutes of internal mixing.

[0037] The above-mentioned kneaded sample was hot-pressed into a sheet having a thickness of 1 mm in a hot press at 190° C., and various tests were performed.

[0038] The above-mentioned samples were tested for tensile properties, using dumbbell-shaped samples, and tested according to ASTM D412-80. The tensile testing machine was Tensilon UMT-300, the tensile speed was 10mm / min, and the tensile test conditions were temperature 23°C. The humidity is 50%, and the results are shown in Table 1.

[0039] In order to test the thermal stability ...

Embodiment 8

[0046] After PEC was dried in a vacuum oven at 35-40°C for 24 hours, and CAB was dried in a vacuum oven at 80°C for 24 hours, the PEC / CAB was weighed according to the mass ratio PPC / CAB=50g / 50g, mixed and stirred at room temperature and then added to the dense In the mixing machine, the temperature of the internal mixer is 190° C., the screw speed is set at 100 rpm, and the material is discharged after 5 minutes of internal mixing.

[0047] The above mixed sample was hot-pressed into a sheet with a thickness of 1mm in a hot press at 190°C, and the thermal stability was tested. Using the SII-TGA analyzer, in an air atmosphere, the heating rate was 20°C / min, and the temperature range was measured 50-550°C. The measurement results show that the maximum thermal degradation temperature of pure PEC is 220℃, and the maximum thermal degradation temperature of the blend is significantly increased to 262℃.

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Abstract

The invention discloses an aliphatic polycarbonate alloy material which is obtained by the following main steps: evenly mixing aliphatic polycarbonate and esterified cellulose, and then directly adding the mixture into a melting mixing device for melt blending. Based on the aliphatic polycarbonate and esterified cellulose, the mass fraction of the aliphatic polycarbonate is 5-95%, the mass fraction of the esterified cellulose is 5-95%, and the aliphatic polycarbonate is a copolymer of carbon dioxide and epoxide. By using the aliphatic polycarbonate alloy material, the mechanical property of the aliphatic polycarbonate material is greatly improved, the applicable temperature range of the aliphatic polycarbonate material is broadened, and the thermal degradation temperature of the aliphaticpolycarbonate material is improved.

Description

technical field [0001] The invention relates to the fields of polymer technology and ecological environment materials, in particular to an alloy of aliphatic polycarbonate co-polymerized with carbon dioxide and epoxy and a preparation method thereof. Background technique [0002] As early as more than 40 years ago, Shoaki Inoue of Japan realized the method of preparing aliphatic polycarbonate by copolymerization of carbon dioxide and epoxide. With the degree of global warming and white pollution, this aliphatic polycarbonate has received more and more attention. This polymerization method is not only an effective way to fix carbon dioxide and reduce carbon dioxide emissions, but also the prepared polymer has good biodegradability and can be naturally biodegraded after use. With the emergence of new catalytic systems, polypropylene carbonate (PPC) copolymerized with carbon dioxide and propylene oxide has achieved large-scale production in China and South Korea. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/14D01F8/02C08L1/10D01F8/16C08L1/12C08L69/00C08K5/29
Inventor 李勇进
Owner 南通九思医疗器械有限公司
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