2014 latest PPS plastic structure performance analysis

Performance analysis of the latest PPS plastic structure in 2014 The molecular structure of polyphenylene sulfide is relatively simple. The main chain of the molecule consists of alternating benzene rings and sulfur atoms, which has high stability. The presence of the benzene ring in the main chain makes the molecular chain rigid. The presence of a thioether bond gives it a certain flexibility; the molecular chain is simple, regular, and has a crystallization ability, and the crystallinity is up to 80%. Based on the comprehensive structural factors, the main performance characteristics of PPS are as follows.

1 PPS has a Tg of °C, a melting point of 286 ° C, and a heat distortion temperature of 260 ° C under a stress of 1.86 MPa. Therefore, the short-term use temperature of PPS is as high as 260 ° C and can be used for a long time between 200 and 240 ° C. At the same time, the mechanical strength of PPS decreases with the increase of temperature, and it can maintain high mechanical strength at 200 °C. PPS has excellent thermal stability, long-term stability in air below 350 °C, short-term stability in air at 400 °C, and can withstand high temperatures of 500 °C without decomposition.

2 In terms of mechanical properties, PPS has high rigidity and creep resistance, but has high brittleness and low notched impact strength. Blending and reinforcement methods are generally employed to improve impact toughness.

3 PPS molecular structure is symmetrical, non-polar, low water absorption, can be used under high temperature, high humidity, high frequency conditions, showing excellent electrical performance.

4 Outstanding chemical resistance is one of the excellent properties of PPS. Its chemical stability is similar to that of PTFE. In addition to being attacked by oxidizing acids (concentrated sulfuric acid, nitric acid, aqua regia, etc.), it is stable to other chemicals. It can be dissolved in any known solvent below 205 °C.

5 PPS molecular structure 70% is aromatic ring, 30% is sulfur, therefore, excellent flame retardant performance, oxygen index of more than 40, the material will not lose flame retardant ability after repeated processing, is the highest combustion safety in plastics one.

The appearance of PPS is usually a white powder with a water absorption of less than 0.03% and a density of about 1.34 g/cm3. Due to the poor impact toughness of PPS, the elongation is low, and the forming process is difficult. Most of the engineering plastics are modified varieties, such as blending with PA, PTFE, PSU, etc., using mica, calcium carbonate, glass fiber, carbon fiber. Such as filling enhancement, it can also be copolymerized with other monomers.

Author: Kim Jin Plastic Co., Ltd., Dongguan City,

Main Products: Black Masterbatch, Color Masterbatch


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Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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