Polyphenylene sulfide polymer compositions and corresponding laser welding applications
A technology of laser welding and polymers, applied in applications, household appliances, household components, etc., can solve the problem that IR radiation does not have sufficient transparency
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[0065] These examples demonstrate the optical and mechanical properties of PPS polymers and PPS polymer compositions.
[0066] PPS polymers were synthesized according to the following scheme. To a 1 L titanium reactor were added 27.20 g of NaOH pellets (0.680 moles), 18.05 g (0.220 moles) of sodium acetate, 62.83 g of NaSH-hydrate (59.49 wt.% NaSH, 0.6667 moles of NaSH), and 167 g of N-methyl Pyrrolidone ("NMP"). The reactor was sealed, pressurized / vented 5 times with nitrogen (92 psig), stirred at 320 rpm, and heated to 150°C over 45 minutes. Simultaneously, 98.00 g of 1,4-dichlorobenzene ("DCB") (0.667 moles) and 50 g of NMP were added to a 300 mL stainless steel addition vessel wrapped in a heating tape. The addition vessel was pressurized and vented five times with nitrogen, pressurized to 90 psig with nitrogen, and then heated to 100°C to completely melt the DCB. After the internal reactor temperature reached 150°C and the pressure reached 40 psig, the reactor was slow...
example 1
[0079] Example 1: Effect of Ion Concentration on IR Transmittance of PPS Polymer Compositions
[0080] This example demonstrates the effect of ion concentration on the transmittance of PPS polymer compositions.
[0081] To demonstrate the effect of ion concentration, five PPS polymer compositions were formed. Samples E1 to E3 were formed as described above (washed with calcium acetate to increase concentration of selected metal ions). Samples CE1 and CE2 were also formed as described above, however, they were washed with water (CE1 ) and acid (CE2) instead of calcium acetate. For each sample, the transmittance at 940 nm and 980 nm was tested. Table 1 shows the sample parameters for each of the samples tested. As used herein, "CE" denotes a comparative example and "E" denotes an example embodiment according to the specification.
[0082] Table 1
[0083]
[0084] Referring to Table 1, for the samples tested, PPS polymer compositions having a calcium ion concentration ...
example 2
[0085] Example 2: Effect of Reinforcing Fillers and Compatibilizers on the IR Transmittance of PPS Polymer Compositions
[0086] This example demonstrates the effect of glass fiber type and silane on the transmittance and mechanical properties of PPS polymer compositions.
[0087]To demonstrate the effect of glass fibers, 4 samples were formed as described above, washed with calcium acetate to increase the calcium content of the PPS. For samples E4, E5, and E7, silane was added as a coupling agent. In addition, sample E4 was formed with round glass fibers (T-779H, commercially available from Nippon Electric Glass), and samples E5 to E7 were formed with flat glass fibers (CSG3PA-820, commercially available from Nittobo Corporation ( Nittobo)) formed.
[0088] Initial mechanical tensile properties, stress at break (tensile strength) and strain at break (elongation at break) were measured according to ISO 527-2 / 1A and reported in Table 2. Measurements were performed on injec...
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