Polyphenylene sulfide resin molded article
A technology of polyphenylene sulfide resin and polyphenylene sulfide, applied in the direction of instruments, optics, optical components, etc., to achieve the effect of high elastic modulus and high dimensional stability
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Examples
manufacture example 1
[0055] A polymerization tank with an ingredient mixer is filled with aqueous sodium sulfide (Na 2 S·5H 2 O) 833 mol, lithium chloride 830 mol, and N-methyl-2-pyrrolidone 500 L were dehydrated at 145° C. under reduced pressure for 1 hour. Next, after cooling the reaction system to 45° C., 905 mol of dichlorobenzene was added and polymerized at 260° C. for 4 hours. The resulting product was washed with hot water five times, N-methyl-2-pyrrolidone at 170°C once, and water three times, and dried at 185°C to obtain a polyphenylene sulfide resin (PPS-1) . The resin has a shear rate of 200sec at 300°C -1 The melt viscosity in is 12Pa·s.
[0056] Components other than the polyphenylene sulfide resin used in Examples and Comparative Examples are as follows.
[0057] [glass fiber]
[0058] GF-1: Flat GF CSG 3PA-830S, manufactured by Nittobo Co., Ltd., flattening rate: 0.25 (short diameter 7 μm / long diameter 28 μm)
[0059] GF-2: Short GF CS 03JAFT591, manufactured by Owens Cornin...
Embodiment 1
[0063] (1) Manufacture of resin composition
[0064] Mix 100 parts by mass of PPS-1 and 25 parts by mass of GF-1, use a Henschel mixer to uniformly mix, use a twin-screw extruder (TEM35, manufactured by Toshiba Machine Co., Ltd.), and set the drum temperature of the extruder to Set at 280-350°C, melt and knead to produce granules.
[0065] (2) Evaluation of physical properties of polyphenylene sulfide resin composition
[0066] Using a 50-ton injection molding machine (manufactured by Nippon Steel Works Co., Ltd.), the particles obtained according to the above (1) are adjusted into test pieces (125 × 12.5 × 0.4-3.2mm) based on ASTM D790, according to The flexural modulus of elasticity (GPa) is measured according to the method based on ASTM D790. The results are shown in Table 1.
[0067] (3) Manufacture of optical components
[0068] Using a 50-ton injection molding machine (manufactured by Nippon Steel Works Co., Ltd.) as a molding machine, the pellets obtained in the abo...
Embodiment 2～4 and comparative example 1～4
[0083] Mix according to Table 1, and obtain pellets and an optical pickup case in the same manner as in Example 1. Also, various physical properties were evaluated in the same manner as in Example 1. The results are shown in Table 1.
[0084] figure 2 and image 3 It is a graph showing the relationship between the thickness (mm) of a molded product and the flexural modulus (GPa). ■ is a molded article obtained from the resin composition of Example 2, ◆ is a molded article obtained from the resin composition of Comparative Example 2, ▲ is a molded article obtained from the resin composition of Example 4, ● is a molded article obtained from the resin composition of Comparative Example 4 A molded article obtained from the obtained resin composition.
[0085] [Table 1]
[0086]
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