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Method for preparing crosslinked carbonic anhydride-epoxypropane copolymer

A technology of propylene oxide and carbon dioxide, which is applied in the field of preparation of carbon dioxide-propylene oxide copolymer, can solve the problems of restricting widespread use and product deformation

Inactive Publication Date: 2008-12-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, carbon dioxide-propylene oxide copolymer is a kind of non-crystalline polymer material, and its glass transition temperature is only about 34°C, so when the temperature exceeds its glass transition temperature, the resulting product will be deformed, which To a large extent, its widespread use is limited,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1. get 100 parts by weight of carbon dioxide-propylene oxide copolymer whose weight average molecular weight is 50,000, 0.05 part by weight of benzoyl peroxide (BPO), 1 part by weight of vinyltrimethoxysilane , 0.01 parts by weight of dibutyltin dilaurate. After the above materials are stirred evenly by a high-speed mixer, they are melt-blended in an internal mixer at 130°C for 3 minutes, and the blended resin is hot-pressed at 150°C, and then cross-linked in hot water at 30°C for 4 hours , to obtain a cross-linked carbon dioxide-propylene oxide copolymer. The measured gel content was 15%, and the mechanical properties were as follows: the tensile strength was 30 MPa, and the elongation at break was 3%.

Embodiment 2

[0016] Embodiment 2. get 100 parts by weight of carbon dioxide-propylene oxide copolymer with a weight average molecular weight of 200,000, 1 part by weight of dicumyl peroxide (DCP), and 1 part by weight of vinyltriethoxysilane 10 parts, 0.3 parts by weight of stannous acetate. After the above materials are stirred evenly by a high-speed mixer, they are melt-blended in an internal mixer at 160°C for 10 minutes, and the blended resin is hot-pressed at 150°C, and then cross-linked in hot water at 90°C for 96 hours , to obtain a cross-linked carbon dioxide-propylene oxide copolymer. The measured gel content was 85%, and the mechanical properties were as follows: the tensile strength was 45 MPa, and the elongation at break was 8%.

Embodiment 3

[0017] Embodiment 3. get 100 parts by weight of the carbon dioxide-propylene oxide copolymer whose weight average molecular weight is 80,000, 0.8 part by weight of di-tert-butyl peroxide (DTBP), vinyl three (β-methoxy 5 parts by weight of ethoxy) silane, 0.2 parts by weight of dibutyl tin dioctoate, after the above-mentioned materials were stirred evenly by a high-speed mixer, they were melt-blended at 180° C. for 8 minutes in an internal mixer, and the blended After the final resin was thermocompressed at 150°C, it was cross-linked in hot water at 40°C for 72 hours to obtain a cross-linked carbon dioxide-propylene oxide copolymer. The measured gel content is 60%, and the mechanical properties are as follows: the tensile strength is 36 MPa, and the elongation at break is 5%.

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Abstract

The invention relates to a method for preparing a crosslinked carbon dioxide-propylene oxide copolymer. The method comprises the following steps that: 100 portions of carbon dioxide-propylene oxide copolymer resins, 0.05 to 1 portion of peroxide, 1 to 10 portions of silane coupling agents and 0.01 to 0.3 portion of catalysts are mixed in an internal mixer; the temperature in the internal mixer is between 130 and 180 DEG C, and the blending time is between 3 and 10 minutes; and the resins after blending are crosslinked for 4 to 96 hours in hot water at a temperature of between 30 and 90 DEG C after hot press molding at a temperature of 150 DEG C, and then the crosslinked carbon dioxide-propylene oxide copolymer is prepared. The gel content measured is between 15 and 85 percent. The range of the mechanical properties is as follows: the tensile strength is between 30 and 45 MPa, and the elongation at break is between 3 and 8 percent. The application scope of the carbon dioxide-propylene oxide copolymer is effectively expanded through crosslinking.

Description

Technical field: [0001] The invention relates to a preparation method of a crosslinked carbon dioxide-propylene oxide copolymer, which belongs to the field of polymer materials. Background technique: [0002] As a new type of material, polymer materials have widely penetrated into various parts of the national economy and various fields of people's lives due to their excellent comprehensive performance, low price, and easy processing and molding, and have been widely used. Today, the annual output of synthetic polymer materials in various countries in the world has exceeded 140 million tons, and the waste plastic is about 40 million t / a, and it is increasing at an alarming rate every year. Although polymer materials will continue to play a very effective role as a platform for economic development in the future, there are always pros and cons. While polymer materials bring convenience to people and improve the quality of life, their use A large amount of plastic waste is al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/02C08F230/08
Inventor 韩常玉边俊甲庄宇刚董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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