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
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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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