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Carbon dioxide-cyclohexene oxide copolymer brittlement modified method

A cyclohexene copolymer and cyclohexene oxide technology, applied in the polymer field, can solve problems such as brittleness

Inactive Publication Date: 2008-11-12
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer exhibits the disadvantage of brittleness (see Journal ofApplied Polymer Science, 2003, Vol.89, 1163-1176 and Polymer, 2001, 42, 3995-4004)

Method used

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  • Carbon dioxide-cyclohexene oxide copolymer brittlement modified method
  • Carbon dioxide-cyclohexene oxide copolymer brittlement modified method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take PCHC (weight average molecular weight 230,000, molecular weight distribution 3.5, n:(n+m)=0.9) 80g (parts by weight, the same below), ABS 10g, acrylonitrile-styrene-acrylic acid terpolymer AS5M 10g. Mix well and dry in vacuum at 80°C for 10 hours. The blend of PCHC and ABS was obtained by banburying at 200°C at a speed of 30r / min in a Haake internal mixer.

[0017] The above blends were made into film tensile samples, and the tensile properties were tested. The Young's modulus is 1.8GPa, the tensile strength is 41.4MPa, the elongation at break is 3.3%, and the glass transition temperature is 119°C.

Embodiment 2

[0019] Take PCHC (weight average molecular weight 230,000, molecular weight distribution 2.5, n: (n+m)=0.95) PCHC 80g, ABS10g, acrylonitrile-styrene-acrylic acid terpolymer AS5M 10g, dissolve in 50ml chloroform under nitrogen protection , most of the chloroform was distilled off under reduced pressure, mixed evenly, and dried under vacuum at 80°C for 10 hours.

[0020] The above blends were made into film tensile samples, and the tensile properties were tested. The Young's modulus is 1.4GPa, the tensile strength is 42MPa, the elongation at break is 8.7%, and the glass transition temperature is 111.3°C.

Embodiment 3

[0022] Take PCHC (weight average molecular weight 190,000, molecular weight distribution 2.5, n:(n+m)=0.86) 70g, ABS 20g, acrylonitrile-styrene-acrylic acid terpolymer AS5M 10g. Mix well and dry in vacuum at 80°C for 10 hours. In a twin-screw extruder, a blend of PCHC and ABS was obtained by banburying at 200° C. at a speed of 30 r / min.

[0023] The above blends were made into film tensile samples, and the tensile properties were tested. The Young's modulus is 1.3GPa, the tensile strength is 33.3MPa, the elongation at break is 4.0%, and the glass transition temperature is 121°C.

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Abstract

The invention provides a method for modifying the brittleness of carbon dioxide-cyclohexene oxide copolymers. The method comprises the following steps of: taking 40 to 90 portions of carbon dioxide-cyclohexene oxide copolymers, 8 to 48 portions of elastic elements, and 2 to 12 portions of terpolymers of acrylonitrile-styrene-acrylic acid, according to weight portion; uniformly mixing the carbon dioxide-cyclohexene oxide copolymers, the elastic elements and the terpolymers of acrylonitrile-styrene-acrylic acid in solvent, or in a Banbury mixer or in a double-screw extruder; and drying the mixture to acquire blends with improved brittleness. The method improves the brittleness of the carbon dioxide-cyclohexene oxide copolymers, maintains the tensile-strength over 30 MPa, improves the elongation even up to over multiple times, and maintains a high vitrification temperature of PCHC.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to a method for modifying a carbon dioxide-cyclohexene oxide copolymer. Background technique [0002] Carbon dioxide-cyclohexene oxide copolymer (PCHC) is an aliphatic polycarbonate synthesized by carbon dioxide-cyclohexene oxide copolymer. Compared with bisphenol A polycarbonate, aliphatic polycarbonate not only has a simple and non-toxic synthesis process, but also effectively utilizes a large amount of greenhouse gas that is harmful to the environment - carbon dioxide, and has biodegradability, which will not cause white pollution. It has good economic, social and environmental benefits. However, due to the low glass transition temperature of general aliphatic polycarbonates, which is close to room temperature, their application as engineering plastics is greatly limited, and they can only be used in the fields of coatings, adhesives, elastomers and low-temperature oxygen barrier f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00B29C47/40C08L53/00
Inventor 庞斌赵超越
Owner TORAY FIBER RES INST(CHINA) CO LTD
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