Poly(phenyleneaulgide)
POLY(1,4-PHENYLENE SULFIDE)
CAS: 26125-40-6
Molecular Formula: C8H11NO3S
Poly(phenyleneaulgide) - Names and Identifiers
Poly(phenyleneaulgide) - Physico-chemical Properties
| Molecular Formula | C8H11NO3S |
| Molar Mass | 201.24284 |
| Density | 1.36g/mLat 25°C |
| Melting Point | 285-300°C |
| Appearance | powder |
| Physical and Chemical Properties | Properties polyphenylene sulfide is white to yellowish powder, glass transition temperature 150°C, heat distortion temperature> 260°C, with high thermal stability, can be used continuously at 280°C. Self-extinguishing. Excellent chemical resistance, organic Alcohols, Ketones, acids, esters, aromatic hydrocarbons, chlorinated hydrocarbons and inorganic acids, bases, salts are stable. Soluble in chlorinated biphenyls, insoluble in most solvents below 170°C. It is itself an insulator, but can become a semiconductor after oxidation or doping. The comprehensive properties of PPS are as follows: Relative density 1chemical book.34 tensile strength (Mpa)70 elongation (%) 3 notched impact strength (Kj/m)1.4 unnotched impact strength (Kj/m)20.6 Martin heat resistance (℃)266 flammability non-combustible hardness (R)124 water absorption (%) 0.02 dielectric constant (103Hz)3.3 dielectric constant (106Hz)3.1 dielectric loss (103Hz)0.0068 resistivity (Ω? cm)3? 012 breakdown voltage (Kv/mm)13.4 arc resistance (s)185 |
| Use | Polyphenylene Sulfide (PPS) is a kind of polymer containing p-phenylene sulfide repeating structural units, which is a new type of functional engineering plastics. Polyphenylene sulfide is a kind of thermoplastic engineering plastic with phenyl sulfur group S in its molecular main chain. The molecular weight is 10000~50000, which is a kind of branched, non-crystalline melting point, high viscosity polymer. Before cross-linking is a linear structure, cross-linked, thermosetting, if given sufficient heating and cooling can also soften to a certain extent, once not really thermosetting plastic. Polyphenylene sulfide is sodium sulfide and dichlorobenzene in a strong polar solvent (hexamethylammonium phosphate), at 220 ℃ ~ 225 ℃ from condensation. The production methods include wheat-type method, Fourier-type method, polycondensation of p-halophenyl chemical thiolate, polycondensation of aromatic polyhalide and alkali metal sulfide solution, etc. The relative density of polyphenylene sulfide is 1.36, the resin is white powder or granular, hard and brittle, high crystallinity, melt viscosity (303 degrees C) 7? 03~2? 05Pa? s. Polyphenylene sulfide has two kinds of low molecular weight and high molecular weight, low molecular weight polyphenylene sulfide, the molecular weight between 4000~5000, Melt flow values ranged from 3000 to 4000. Due to the high value of melt flow, it is difficult to direct molding, so in addition to spraying, it must be used in other methods of molding through a certain degree of crosslinking, and a certain amount of glass fiber or inorganic filler, for injection molding, molding and extrusion. High molecular weight polyphenylene sulfide can be used directly in the processing of plastic products without cross-linking. |
Poly(phenyleneaulgide) - Risk and Safety
| WGK Germany | 3 |
Poly(phenyleneaulgide) - Characteristics and application of poly (phenylene sulfide)
from VIP Journal Professional Edition
Author:
Abstract:
Polyphenylene Sulfide (PPS) short for PPS is a heat-resistant engineering plastic. In this paper, the characteristics, present situation at home and abroad and application examples of high temperature resistant and high performance polyphenylene sulfide engineering plastics are briefly introduced.
Key words:
polyphenylene sulfide high temperature resistance High Performance
DOI:
10.3969/j.issn.1001-9456.2002.02.007
cited:
year:
2002
Last Update：2024-01-02 23:10:35
Poly(phenyleneaulgide) - Synthesis and application of Polyphenylene Sulfide
from VIP Journal Professional Edition
Author:
Abstract:
Polyphenylene Sulfide (PPS) is by far the world's most cost-effective special engineering plastics, due to the electrical insulation materials, conductive materials, flame retardant materials, friction materials, heat-resistant materials and polymer alloys have a wide range of applications and become a research hotspot at home and abroad. The structure, properties, synthesis and application of polyphenylene sulfide were reviewed, and the future development of polyphenylene sulfide was predicted.
Key words:
PPS, friction, insulation, conductive
DOI:
10.3969/j.issn.1005-3174.2003.01.011
cited:
year:
2003
Last Update：2023-08-16 22:09:08
Poly(phenyleneaulgide) - Production method of polyphenylene sulfide fiber
from Palm Bridge research
Public/Announcement Number:
CN100999833 A
inventor:
cycle meter , Wang Qinyun , Zhou Jianping , he satellite
cited:
Abstract:
The invention details a production method of polyphenylene sulfide fiber, which is mainly by selecting linear polyphenylene sulfide raw materials with excellent performance and performing melt spinning at 280~350 ℃, in the spinning process, a heating device with a temperature of 250~320 ℃ is installed, and the temperature of heat preservation and cooling is reasonably controlled. The fiber winding speed is controlled at 300 ~ 1500m/min, the coiled fiber is drawn at 80-280 ℃ and set at 150-300 ℃, and the yield of the Polyphenylene sulfide fiber produced by the present invention is high, and the breaking strength and breaking elongation of the fiber are obtained, the dry heat shrinkage and other properties are excellent, and the method is particularly suitable for the production of polyphenylene sulfide filament fibers.
Last Update：2023-08-16 22:09:08
Poly(phenyleneaulgide) - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | Polyphenylene sulfide (PPS) is a polymer containing repeating units of p-phenylene sulfide in the molecule, is a new type of functional engineering plastics. Polyphenylene sulfide is a kind of thermoplastic engineering plastic with phenyl sulfur group S in its molecular main chain. The molecular weight is 10000~50000, which is a kind of branched, non-crystalline melting point, high viscosity polymer. Before cross-linking is a linear structure, cross-linked, thermosetting, if given sufficient heating and cooling can also soften to a certain extent, once not really thermosetting plastic. Polyphenylene sulfide is sodium sulfide and dichlorobenzene in a strong polar solvent (hexamethylammonium phosphate), at 220 ℃ ~ 225 ℃ from condensation. The production methods include wheat-type method, Fourier-type method, polycondensation of one-halide thiophenol salt, polycondensation of aromatic polyhalide and alkali metal sulfide solution, etc. The relative density of polyphenylene sulfide is 1.36, the resin is white powder or granular, hard and brittle, high crystallinity, melt viscosity (303 degrees C) 7? 03~2? 05Pa? s. Polyphenylene sulfide has two kinds of low molecular weight and high molecular weight, low molecular weight polyphenylene sulfide, the molecular weight of 4000~5000, melt flow value in the range of 3000~4000. Due to the high value of melt flow, It is difficult to direct molding, so in addition to spraying, used in other methods of molding to a certain degree of cross-linking, and infiltration of a certain amount of glass fiber or inorganic filler, for injection molding, molding and extrusion. High molecular weight polyphenylene sulfide can be used directly in the processing of plastic products without cross-linking. |
| properties | PPS is a white to yellowish powder with a glass transition temperature of 150°C and a heat distortion temperature of> 260°C, it has high thermal stability and can be used continuously at 280°C. Self-extinguishing. Excellent chemical resistance, organic Alcohols, Ketones, acids, esters, aromatic hydrocarbons, chlorinated hydrocarbons and inorganic acids, bases, salts are stable. Soluble in chlorinated biphenyls, insoluble in most solvents below 170°C. It is itself an insulator, but can become a semiconductor after oxidation or doping. The comprehensive properties of PPS are as follows: Relative density 1.34 tensile strength (Mpa) 70 elongation (%) 3 notched impact strength (Kj/m) 1.4 unnotched impact strength (Kj/m) 20.6 Martin heat resistance (℃) 266 flammability non-combustible hardness (R) 124 water absorption (%) 0.02 dielectric constant (103Hz) 3.3 dielectric constant (106Hz) 3.1 dielectric loss (103Hz) 0.0068 resistivity (Ω? cm) 3? 012 breakdown voltage (Kv/mm) 13.4 arc resistance (s) 185 |
| structure and performance characteristics of PPS | Polyphenylene Sulfide (PPS) has a simple molecular structure, and the molecular chain is alternately connected by benzene rings and sulfur atoms, the π electron portion of the benzene ring is overlapped, and the energy is further reduced to form a stable conjugated structure. The phenyl ring structure imparts rigidity to the Polyphenylene sulfide, and the thioether bond provides flexibility to the Polyphenylene sulfide. Not only has the performance of general engineering plastics, but also has some unique properties, mainly in the following aspects. 1, the heat resistant polyphenylene sulfide has excellent thermal stability, the thermal deformation temperature of the product is greater than 260, the long-term use temperature is 200-220, and the short-term can withstand the high temperature of 260. Among the thermoplastic resins, PPS has the highest heat resistance and is comparable to Polytetrafluoroethylene and polyimide. Linear PPS by heating or chemical cross-linking can be used at 290 deg C, 400 deg C in nitrogen or air without weight loss, 700 deg C in air degradation, there is still 1000 carbon residue rate in inert gas at 40% ℃, and the heat resistance is far beyond that of nylon (PA), thermoplastic polyester (PBT) and polyoxymethylene (POM) and other engineering plastics. 2, chemical corrosion resistance PPS is composed of benzene structural unit, with high crystallinity, after curing crosslinking, has excellent chemical corrosion resistance, its corrosion resistance is second only to tetrafluoroethylene. PPS is resistant to all inorganic substances and almost all organic solvents except oxidative media, and only partially dissolves in chlorinated aromatic solvents and heterocyclic compounds when the temperature exceeds 190 °c. It must be noted that free fluorine, chlorine, bromine and strong oxidizing media (such as aqua regia, nitric acid, concentrated sulfuric acid, chromic acid, chlorosulfonic acid, hypochlorous acid, etc.) will cause serious corrosion to PPS, the reason is that in these media, the sulfur atoms will be oxidized and the sulfur-carbon bonds will be destroyed. However, even at temperatures above 100 ° C., strong alkali, phosphoric acid, hydrofluoric acid, formic acid, acetic acid and other organic acids cannot corrode PPS, materials such as enamel and titanium are also less resistant to corrosion than PPS. 3, flame retardant polyphenylene sulfide itself has flame retardant properties, without flame retardant up to UL-94-V0, can burn in the flame, but will not splash, Self-extinguishing when leaving the fire, the smoke rate is lower than that of chlorinated polymers. 4, electrical properties compared with other engineering plastics, polyphenylene sulfide dielectric constant and dielectric loss tangent values are lower, and in the larger frequency, temperature and humidity range can still maintain good insulation performance. Polyphenylene sulfide arc resistance is good, can be comparable with thermosetting plastics, commonly used in electrical insulation materials, its dosage can account for about 30%. 5, mechanical properties of pure polyphenylene sulfide mechanical properties is not high, especially the impact strength is relatively low, with glass fiber (GF) enhanced, the impact strength increased from 27J/m to 76J/m, the tensile strength increased from 6MPa to 13.7MPa. The flexural modulus of PPS is up to 3.8GPa, and the inorganic filler can reach 12.6GPa after being filled and modified. It has good creep resistance and wear resistance under load, and also has a certain self-lubricating property, can be used instead of part of the metal. 6, dimensional stability of polyphenylene sulfide molding shrinkage and linear expansion coefficient is small, generally 0.15-0.30%, the lowest up to 0.01%. Under high temperature environment, the size is almost unchanged after moisture absorption, and the water absorption rate is generally only about 0.03%. When used in high temperature and high humidity environment, it is not warped and unchanged, and the dimensional stability is good. 7, processing performance of polyphenylene sulfide melt viscosity is low and good fluidity, can be used such as extrusion, injection, rolling and other common processing methods for processing, at the same time can be precision molding. Because PPS has good corrosion resistance and adhesion properties, it can be well bonded with glass, aluminum, ceramics, steel, silver, chromium, nickel plated products and stainless steel and other materials. It can be made into film, membrane and fiber, and its application range is further expanded. Of course, polyphenylene sulfide also has some shortcomings. Pure polyphenylene sulfide products have high brittleness and poor toughness, Welding strength is not high, the glass transition temperature of amorphous part is low (Tg = 85 deg C), more than 90 deg C, many mechanical properties will be reduced. Polyphenylene sulfide molding process requires a higher mold temperature (l30 ℃-150 ℃), the melt viscosity is unstable, high temperature in the air easy oxidation crosslinking, limiting its application. |
| application field | in the international market, PPS Resin is mainly used in engineering plastics, fiber, coating and film and other fields, the proportion of each field in the market is as follows: plastic 80% fiber 10% coating 5% film 5%. PPS alloy with high wear resistance and self-lubricating properties is widely used in mechanical, automotive, aerospace and military fields; PPS alloy with excellent impact strength and flame retardant properties, mainly used in the machinery industry, electrical and Electronics; In addition, there are used in the wire and cable and other communication information industry. Plastic grade PPS in PPS Resin accounted for the largest proportion, the most widely used. The device made of PPS does not need flame retardant, has small moisture absorption and excellent electrical insulation, and can withstand the erosion of corrosive media such as cleaning agent and welding liquid. The adhesion of PPS is outstanding, and can be made into electronic packaging materials, for the packaging of electronic components and integrated circuits with special requirements; In addition, PPS alloy can replace some metal materials, made of some auto parts, such as water tank, vaporizer, clutch, oil pump, etc, PPS plastics are used in landing gear and wing components, including aerospace and commercial aircraft; Due to physiological inertness, PPS is also widely used in the food and pharmaceutical industries. PPS coating density, corrosion resistance, cross-linking after the maximum use temperature of 300 ℃, widely used in petrochemical, pharmaceutical food, military, electronic instrumentation and other industries, such as corrosive environment in the pipeline, Valve, kettle body, storage tank, non-stick pan, etc. Made of pure PPS film or PPS composite film prepared by lamination technology, can be used for electrical insulation materials, electronic components, auto parts, diaphragm materials, decorative materials, etc., as well as adhesive tape, printer parts, heat-resistant food packaging materials, etc., can also be made into a conductive film. PPS fiber has good heat resistance, similar to PET and PA resin, After tensile treatment, the strength and modulus of PPS Resin are improved, so it can be developed for new applications in film and fiber. PPS fiber has excellent chemical resistance (no solvent soluble at 200 ℃), long-term use of 200~220 ℃ thermal stability, flame retardant (LOI ≥ 35), radiation resistance (GY ≥ 1 × 107), good mechanical properties and excellent electrical insulation properties, is a new type of special functional fiber. |
| preparation method | The synthesis methods of PPS include: Genvresse route, Macallum method, self-polycondensation of p-halophenone thiophenol metal salt, sodium sulfide method, ring-opening polymerization of cyclic phenylene sulfide oligomer (CPS), Radical Polymerization of BIS (4-halophenyl) disulfide, oxidation of diphenyl disulfide, sulfur solution method, etc. |
Last Update：2024-04-09 21:21:28
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