Blend of carbon dioxide-propylene oxide copolymers and preparation method thereof

A technology of propylene oxide and carbon dioxide, which is applied to the blend of carbon dioxide-propylene oxide copolymer and its preparation field, can solve the problems of limiting the application range of PPC, low elongation at break and the like, and achieves high elongation at break, Improves compatibility and suppresses precipitation

Active Publication Date: 2011-05-25
中科应化(长春)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The blending modification method provided by the prior art increases the tensile strength, Young's modulus, and yield stress of the carbon dioxide-propylene oxide copolymer, but its elongation at break is still low, which limits the application range of PPC

Method used

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  • Blend of carbon dioxide-propylene oxide copolymers and preparation method thereof
  • Blend of carbon dioxide-propylene oxide copolymers and preparation method thereof
  • Blend of carbon dioxide-propylene oxide copolymers and preparation method thereof

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preparation example Construction

[0049] The present invention also provides a method for preparing a blend of carbon dioxide-propylene oxide copolymer, comprising: a), preparing urethane compounds;

[0050] b), mixing the urethane compound prepared in step a) with the carbon dioxide-propylene oxide copolymer in a weight ratio of 5 to 15: 85 to 95 to obtain a solid mixture;

[0051] c), the solid mixture obtained in step b) is subjected to a melt blending operation to obtain a blend of carbon dioxide-propylene oxide copolymer;

[0052] The urethane compound is one of the compounds represented by formulas I to VI. Wherein, n is 2, 4, 6, 10 respectively; R is methyl, ethyl, propyl or butyl.

[0053] According to the present invention, the urethane compounds are prepared using a non-isocyanate method, that is, diisocyanates are not used to prepare the urethane compounds, but aliphatic dibasic primary amines and carbonates are used to prepare the urethane compounds. The carbonate used in the present invention is...

Embodiment 1

[0062] The 500mL round bottom flask was vacuumized 4 times to make its vacuum degree 669Pa, and nitrogen was charged into the round bottom flask, and the nitrogen volume content was 99.99%. 11.6g (0.1mol) of hexamethylenediamine and 25mL (0.28mol) of propylene carbonate and CaH 2 Refluxed 45 mL of anhydrous dichloromethane was added to the round bottom flask. Put the round-bottomed flask into a constant temperature control bath, control the temperature at 30±5°C, and continuously stir the mixed solution in the round-bottomed flask at a speed of 90rpm for 12h, so that the cyclic carbonate and hexamethylenediamine undergo ring-opening addition reaction, After the reaction, add 240mL of analytically pure anhydrous ethyl acetate to the mixed solution, stir the resulting mixed solution for 3h at a speed of 120rpm, the white solid powdery product slowly settles out, and separate the white powder product, each time with 60g of analytically pure Wash with anhydrous ethyl acetate and ...

Embodiment 2

[0067] The 500mL round bottom flask was vacuumized 4 times to make its vacuum degree 669Pa, and nitrogen was charged into the round bottom flask, and the nitrogen volume content was 99.99%. 18.2g (0.16mol) hexamethylenediamine and 33.1g (0.38mol) ethylene carbonate and through CaH 2 Refluxed 60 mL of anhydrous dichloromethane was added to the round bottom flask. Put the round-bottomed flask into a constant temperature control bath, control the temperature at 30±5°C, and continuously stir the mixed solution in the round-bottomed flask at a speed of 100rpm for 10h, so that the cyclic carbonate and hexamethylenediamine undergo ring-opening addition reaction, After the reaction is over, add 300mL of analytically pure anhydrous ethyl acetate to the mixed solution, stir the resulting mixed solution for 3h at a speed of 120rpm, the white solid powdery product slowly settles out, separates the white powdery product, and the white solid powdery product slowly After precipitation, the ...

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Abstract

The invention provides a blend of carbon dioxide-propylene oxide copolymers, which comprises 5wt percent to 15wt percent of urethane compounds and 85wt percent to 95wt percent of carbon dioxide-propylene oxide copolymers. The urethane compounds are one kind of materials in compounds shown as from the formula I to the formula VI, wherein n is respectively 2, 4, 6 and 10, and R is methyl, ethide, propyl or butyl. Because molecules of small-molecular urethane compounds contain urethane bonds and/or hydroxide radicals and can be used as proton donors, and the carbon dioxide-propylene oxide copolymers contain carbonyls and can be used as proton acceptors, so the molecules of the urethane compounds can form stronger hydrogen bond effects with the carbon dioxide-propylene oxide copolymers, the compatibility is greatly improved, and further, the fraction elongation rate of the carbon dioxide-propylene oxide copolymers is effectively improved. The invention also provides the preparation method of the blend of the carbon dioxide-propylene oxide copolymers.

Description

technical field [0001] The invention relates to the field of polymer modification, in particular to a carbon dioxide-propylene oxide copolymer blend and a preparation method thereof. Background technique [0002] Carbon dioxide-propylene oxide copolymer (PPC) is a fully degradable polymer, an aliphatic polycarbonate prepared from carbon dioxide and propylene oxide under the action of a catalyst. PPC can chemically fix more than 40wt% of the total carbon dioxide during the synthesis process. It is not only low in cost but also has high transparency, excellent gas barrier and processability, and is widely used in the field of film and packaging materials. However, PPC molecules present an amorphous state, which makes the material formed by PPC brittle at low temperature, poor in high temperature dimensional stability, low strength, and poor toughness, which limits the application of PPC in other fields. [0003] In order to enhance the application value of PPC and make it app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K5/205
Inventor 陈丽杰秦玉升周庆海王献红赵晓江王佛松
Owner 中科应化(长春)科技有限公司
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