F30-03 POM is mianly for engineering products for general use.POM (English: polyformaldehyde) crystalline thermoplastic polymer. Known as the “super steel” or “race of steel”, also known as polyoxyethylene methyl. Structure, the English abbreviation for the POM. Usually derived from the polymerization of formaldehyde polymer, the degree of polymerization is not high, and the vulnerable thermal depolymerization.
POM is a no side-chain, high-density, high-crystalline linear polymer with excellent performance. POM is a smooth, shiny, hard and dense material, yellow or white, in the -40-100 ° C temperature range, long-term use. Its wear resistance and self-lubricating plastic is superior than most, and good oil resistance, peroxides performance. Very acid, alkali and intolerance intolerant solar ultraviolet radiation. POM tensile strength 70MPa, water absorption, dimensional stability, glossy, the good performance than nylon, POM is a highly crystalline resin, the thermoplastic resin is the toughest. With thermal strength, flexural strength, fatigue resistance of high intensity, abrasion resistance and excellent electrical properties.
General synthesis of POM aqueous solution of formaldehyde in the presence of acid condensation polymerization. Received more than 100 degree of polymerization of a-POM, and then broken down into formaldehyde gas heated by the refined and dehydration, often using some of the pre-polymerization of purified monomer, and then pass into the initiator containing a small amount of solvent in the dry polymerization. Because of the presence of water, so that a significant reduction in molecular weight. Initiator can be a Lewis acid or alkali. But most of the anion with tertiary amine addition polymerization, the reaction is as follows: POM acetal end groups of a half (-CH2OH), when the temperature is higher than 100 ℃, end-easy to break, the general subject that the stability of end-processing of. Stabilization can be heat treated to 230 ℃. Paraformaldehyde in 170 ~ 200 ℃ temperature processing, such as injection, extrusion, blow molding, etc. Mainly used for engineering plastics for the automotive, mechanical parts and so on.
Polyoxymethylene (pom) is an excellent engineering plastics, in foreign countries have “wins Steel”, “2 POM products.
Super steel, “said. Pom with similar metal hardness, strength and rigidity, in a wide range of temperature and humidity have a good self-lubricating, good fatigue resistance, and resilient, it also have better chemical resistance. pom below the cost of many other engineering plastics, is replacing some of the traditionally occupied by the metal markets, such as alternative zinc, brass, aluminum and steel production in many parts, since its inception, pom has been widely used in electrical and electronic, mechanical, instrumentation, daily light industry, automobile, building materials, agriculture and other areas in many new areas of applications such as medical technology, sports equipment, etc., pom also showed good growth .
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