Crosslinking of polyaryletherketones

A technology of polyaryletherketone and crosslinking agent, which is applied in the field of crosslinking of polyaryletherketone, and can solve problems such as high environmental pollution and user hazards

Active Publication Date: 2021-03-26
科德宝集团
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Another disadvantage is that the handling of volatile diamines at high temperature presents considerable hazards to users and high environmental pollution

Method used

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  • Crosslinking of polyaryletherketones
  • Crosslinking of polyaryletherketones
  • Crosslinking of polyaryletherketones

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] Mixtures were prepared as shown in Table 1. According to Thompson and Farris, 1988, amine-functionalized PEEK (hereinafter referred to as "AF-PEEK") was prepared using PEEK and p-phenylenediamine, and ground into powder. The total nitrogen content was determined according to the Kjeldahl method, and the conversion rate of PEEK carbonyl group was 95%. DAPI with a purity of 98% (CAS No. 54628-89-6) was used as a crosslinker.

[0097] Table 1: Mixtures

[0098] instance number compounding 1 (control) PEEK 2 (control) PEEK, 4 wt% AF-PEEK 3 PEEK, 1.05 wt% DAPI

[0099] The mixtures in Table 1 were processed into test specimens in injection molding and then heat treated to crosslink.

[0100] Table 2: Heat treatment and tensile elongation test results

[0101]

[0102] Tensile tests were carried out at 240° C. according to standard DIN EN ISO 527-2.

[0103] The results show that the samples according to the invention become in...

Embodiment 2

[0111] As in previous Example 1, the DAPI isomer mixture (crosslinker of formula VI) of Chemical Abstracts Service CAS No. 68170-20-7 was mixed into medium viscosity commercial PEEK by twin-screw compounder, and the The strands are chopped into granules.

[0112] Table 3: Mixtures

[0113]

[0114]

[0115] Pellets from the mixtures of Table 3 were processed into test specimens in injection molding and then also subjected to a thermal aftertreatment. Test specimens in T-scans by means of DMA according to Example 1, thus obtaining figure 2 The results shown.

[0116] figure 2 Shown is article 4 (PEEK with 1% DAPI (CAS No. 68170-20-7, heat-treated, dashed curve) compared to standard base material 1 (non-heat-treated PEEK, solid line), according to the invention Evolution of the molded complex dynamic modulus with increasing temperature.

[0117] Here, refer to figure 1 The advantageous results discussed are also obtained in a similar fashion.

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Abstract

The invention relates to a method for producing a crosslinked moulded article containing polyaryletherketones (PAEK). The method comprises the steps of (a) providing a mixture containing a PAEK and acrosslinking agent; (b) producing a moulded article from the mixture; and (c) thermally treating the moulded article at a temperature at which PAEK is crosslinked to obtain the crosslinked moulded article, wherein the crosslinking agent is a di(aminophenyl) compound in which the two aminophenyl rings are connected to each other via an aliphatic group which has a carbocyclic group. The invention also relates to moulded articles obtainable by using the method, and to the sealing articles.

Description

technical field [0001] The present invention relates to a method for producing molded articles from polyaryletherketone (PAEK) and a crosslinking agent. The invention also relates to molded and sealed articles obtainable by this method. Background technique [0002] Polyaryletherketone (PAEK), like polyetheretherketone (PEEK), is a semi-crystalline high-performance polymer with high temperature resistance and medium resistance. It consists of alternating keto, ether and aryl groups. One advantage of PAEK is thermoplastic processability. However, thermoplastics have inherent limits in temperature resistance. In order to improve the temperature resistance and mechanical stability of PAEK, it is proposed to cross-link the polymer chains. In the prior art, the method of crosslinking PAEK and diamine is used for crosslinking. Here an imine bond (Schiff's base) is formed, which makes the cross-linked polymer more stable. The disadvantage is that such cross-linked polymers ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08L71/00
CPCC08G65/48C08G65/485C08L71/00C08G14/00C08G8/02C08G8/28
Inventor T·斯查伯M·萨特A·泽勒K·特鲁克修斯C·克拉夫特I·斯奇马泽尔M·施密特M·尼克拉斯S·贝赫勒J·文策尔B·哈弗曼
Owner 科德宝集团
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