Polyphenylene Ether (PPE for short) and Polyphenylene Oxide (PPO for short) both refer to the same polymer, because it is an oxide and also belongs to ether compounds. It is called polyoxyxylene in Chinese. American G.E company first invented the use of 2,6-Xylenol in the presence of copper odorate and Diamine catalysts in the 1960s, using a mixture of toluene and methanol as a solvent and introducing oxygen to synthesize PPE at room temperature, 2,6- Xylenol is a monomer (Monomer) obtained by the reaction of phenol and methanol, and its manufacturing process was also successfully developed by G.E Company in the early stage. PPE is an amorphous polymer with a Tg as high as 210°C, so it has poor processability and cannot be used alone as a raw material for molding. However, PPE can be mixed with polystyrene (PS) in any ratio and shows good compatibility. PPE modified by PS or other polymers is referred to as m-PPE, and its processability is very good. m-PPE is one of the five general-purpose engineering plastics
There are only 3 PPE manufacturers in the world, and the production capacity is concentrated in a few manufacturers. G.E Company accounts for 76% of the global production capacity, and the other two are Japan’s Asahi Kasei and Polyxylenol Singapore (PXS). The above-mentioned three manufacturers are directly or indirectly involved from the raw material 2,6-Xylenol to the final product m-PPE. Even if other manufacturers have patented technology, it is difficult to join the ranks of competition. However, there are still several companies with technical background in engineering plastics that no longer produce PPE but still invest in the production of m-PPE. SABIC Noryl SE1GFN3–G.E has three global PPE production bases in the United States, the Netherlands, and Japan, with a total production capacity of 141,000 metric tons, and the production capacity of m-PPE (trade name Noryl) is as high as 315,000 metric tons. G.E also sells PPE powder to other companies to produce various m-PPE, and other manufacturers purchase PPE powder from G.E or Asahi Kasei. In 1984, G.E established a joint venture with Mitsui Petrochemical and Mitsui Topress Chemicals to establish GEM Polymers in Japan. G.E holds 51% and Japan holds 49% of the shares. It specializes in the production of 2,6-Xylenol and PPE. The product PPE powder is Handed over to GEP Japan to produce various m-PPE.
The main features of SABIC NORYL:
1. Good balance properties, tailorable heat resistance, good hydrolytic stability, high dielectric strength and optional non-halogenated flame retardants in low specific gravity materials. Can be designed to replace stamped steel, die-cast metal and brass in functional assemblies. Compatible with a variety of packing technologies to further tailor desired properties. Stiffness and strength High stiffness, tensile and flexural strength, even at elevated temperatures, with progressively lower modulus as temperature increases, which is a key advantage.
2. Due to the inherent high heat resistance of the material, it has good creep resistance even at high temperatures, and it can be made better by adding various filler systems.
3. Impact strength Predictable impact strength, hardly affected by humidity
4. Good electrical properties High dielectric strength and excellent electrical properties
5. Has good flame retardancy, halogen-free flame retardant grade, which helps products comply with a wide range of environmental standards, including UL94V-0. In addition to low toxicity in accordance with GEI 02.37.2, select grades are designed to meet low smoke requirements in the transport segment.
6. Chemical resistance Generally has good resistance to acids, alkalis and many cleaning agents.
7. Hydrolytic stability Excellent hydrolytic stability, the water absorption rate is the highest among any engineering thermoplastics.
8. Low mold shrinkage Good dimensional control with very low mold shrinkage coefficient.
The following are the physical properties of Saudi-SABIC plastic NORYL PPE/PS SE1GFN3
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