Shanghai Daoqin Plastics Co., Ltd.

polyoxymethylene (POM) Polyoxymethylene（简称POM）, is large engineering plastics 之一, separation structure and crystallization property make its material mechanical properties separation excellent, is types comprehensive property can excellent thermoplastic property resin. POM most USA DuPont company in 1959 year development formed 功, utilizing aldehyde solvent liquid and alcohol reaction, 经 脱 water, hot understanding to made aldehyde, rear in catalytic agent function lower liquid versus polymerization, polymerization rear use acid ester 化进行封端.

according to production process 差异, separation is homopolymer and copolymer types , DuPont company using/adopting is homopolymer, another 一家Celanese company using/adopting copolymer. homopolymer generally high pure degree aldehyde polymerization 而, separation upper full 由-CH2-O-键连续构 formed. copolymer generally polyoxymethylene (POM) and 2-5% 二 oxygen ring in catalytic agent in lower cationic addition polymerization methods ring polymerization formed, make its -CH2-O-主链 upper has random distribution -CH2-CH2-O- 键 structure.

POM主链 is -CH2O-, separation 子链几乎没 has separation 支, carbon upper belt/tape hydrogen 原子, structure property high, carbon oxygen can high, inner poly can density high, poly 集紧密, crystallization degree relatively high. it tool has excellent strong/high degree and rigid property, good corrosion resistant, wear resistant, lubricated property and resistant creep property can, fatigue resistance can, is engineering plastics in force property can most metal material, tensile strength can 达68.9MPa, in very more combined can substitute/replace iron, copper, zinc, aluminum and other metal material, 因而POM also has outer 号“赛钢”. and ABS versus ratio, POM做 formed 键盘因 is wear resistance more good, more easy 出现“打油” phenomenon. 但POM也存 in 一 不足之处, impact tough property low, 缺口敏感 property large, heat resistant property 差, friction coefficient relatively large and other . this disadvantages large made POM in field/area in application scope expand large, is 此, for POM modified formed is lower POM research hot 点.

polyoxymethylene (POM) reinforcement

polyoxymethylene (POM) although is comprehensive property can relatively good engineering plastics, is 进一步 improvement its heat resistant property, rigid property, dimensional stability, fatigue resistance, creep resistance and force property can, for polyoxymethylene (POM) composite/compounding reinforcement, meet/satisfy various applications use. polyoxymethylene (POM) composite/compounding reinforcement in use filler, main/primary has long short glass fiber, carbon fiber, glass beads, slip powder or titanium acid must and other.

polyoxymethylene (POM) toughened

due to POM crystallization degree relatively high, generally 达70%～85%, crystallization relatively large, notched impact strength low, 往往以脆 property methods fracture. improvement POM impact tough property main/primary has types methods: is elastomer toughened; is rigid property pellets toughened.

polyoxymethylene (POM) wear resistant modified

POM separation structure 规整, crystallization degree high, surface hardness large, in scratch sliding process in its large separation easy scratch direction orientation strong/high 化, can large, separation inner poly can high, 因而POM tool has good wear resistant lubricated property can. still difficult meet/satisfy high negative 荷, high speed, high temperature and other as conditions requirements, 需进一步 improvement POM wear resistance can. improve/increase POM wear resistance can has types methods: types is chemical modified. utilizing 接技, and other in POM separation upper tool has lubricated property 链段. types is material blending modified.

polyoxymethylene (POM) weather resistance

POM light degradation in its separation upper formed and 羰基, 而随 羰基 concentrated degree increase, POM absorption outer light can force reinforcement, more more fracture. currently research table/sheet 明, nano grade oxidation zinc and can has decrease 缓POM light degradation process.

polyoxymethylene (POM) flame retardant property

POM oxygen index (LOI) is 15%, is easy plastics product types. POM as is engineering plastics by used for automotive, electronics electrical and building materials and other field/area, this field/area for material flame retardant property requirements relatively high. 因POM and its it material versus property 差, through 直接添 add flame retardant difficult made property can excellent flame retardant POM.