Hydrophobic high-CTI polyphenylene sulfide composition as well as preparation method and application thereof
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A polyphenylene sulfide, hydrophobic technology, applied in the field of engineering plastics, can solve the problems of material dimensional stability and stiffness reduction
Active Publication Date: 2021-03-09
KINGFA SCI & TECH CO LTD
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At the same time, a small amount of conductive filler and polyamide resin can be used to achieve the same tracking resistance performance as traditional high-fill
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Embodiment 2
[0048] Comparing Example 1 with Example 2, it can be seen that the diameter of the glass fiber in Example 1 is in the range of 6-10mm, the diameter of the glass fiber in Example 2 is not in the above range, the flexural modulus, notch in Example 1 Impact strength, shrinkage rate, CTI are all better than embodiment 2;
[0049] Comparing Examples 1, 3, and 4, it can be seen that the coupling agent in Examples 1, 3 is one of aminosilane coupling agents and methoxysilane coupling agents, and the coupling agent in Example 4 is Titanate coupling agent, flexural modulus, notched impact strength, shrinkage, CTI of embodiment 1, 3 are all better than embodiment 4;
Embodiment 7
[0050]Comparing 1, 5-8, it can be seen that the viscosity (25°C) of the fluorosilicone oil in Examples 1, 5, and 6 is in the range of 500-1500mPa.s, and the viscosity (25°C) of the fluorosilicone oil in Example 7 is 300-9000mPa. Within the range of s, the viscosity (25°C) of the fluorosilicone oil in Example 8 is not within the range of 300-9000mPa.s, and the flexural modulus, notched impact strength, shrinkage, and CTI of Examples 1, 5, 6, and 7 are all better than those of the implementation Example 8, the flexural modulus, notched impact strength, shrinkage rate, and CTI of Examples 1, 5, and 6 are all better than Example 7;
[0051] Comparing Examples 9 and 10 with Examples 11 and 12, it can be seen that Examples 9 and 10 meet the requirements of "polyphenylene sulfide 45-70 parts, glass fiber 30-55 parts, coupling agent 0.5-1 part, fluorosilicone oil 0.8- 1.5 parts and 0.2-0.5 parts of antioxidant", the notched impact strength, shrinkage rate, CTI of embodiment 9-10 are a...
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Abstract
The invention discloses a hydrophobic high CTI polyphenylene sulfide composition. The composition comprises the following components in parts by weight: 30-80 parts of polyphenylene sulfide, 10-60 parts of glass fibers, 0.2-2 part of a coupling agent, 0.2-2 part of fluorosilicone oil and 0.1-2 part of an antioxidant. According to the hydrophobic high CTI polyphenylene sulfide composition, the compatibility of PPS and a glass fiber material is improved through the coupling agent, the rigidity and the toughness of the material are further improved, meanwhile, the fluorosilicone oil is added, andthe characteristics of low surface energy and super-hydrophobicity of the fluorosilicone oil are utilized, in the injection molding process, due to the low surface energy, the composition is gatheredon the material surface, and the influence on the rigidity of the material is small. Meanwhile, after the fluorosilicone oil is gathered on the surface, the wetting of the PPS by the electrolyte canbe greatly reduced due to the super-hydrophobic characteristic, and the CTI of the PPS material can be obviously improved.
Description
technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polyphenylene sulfide composition with high hydrophobicity and high CTI and its preparation method and application. Background technique [0002] Polyphenylene sulfide (PPS) has excellent high temperature resistance, dimensional stability, chemical resistance, creep resistance and self-flame retardancy, and is widely used in electronics, automobiles, and precision instruments. However, since the main chain of PPS is composed of a large number of benzene rings, when the PPS surface is discharged, the benzene ring structure will break to generate free radicals, and a conductive carbon layer will be formed on the surface, resulting in poor tracking performance (CTI) of PPS. , In general, the CTI of PPS is less than 150V. [0003] With the continuous improvement of the safety performance of electronic appliances, the requirements for CTI are getting higher and higher....
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