Polyphenylene ether (ppoThe overall performance is excellentThe hardness of PPO is higher than that of nylon, PC and POM, and the creep variable is very small. Excellent hydrolysis resistance, low moisture absorption, and good dimensional stability. High heat resistance, long-term use temperature of 120 °C. The coefficient of thermal expansion is the smallest in plastics, close to that of metals.
ppoofCons:It is difficult to form because of poor melt fluidityIt cannot be made into engineering plastics without modificationMost of the PPOs on the market are modified products with multi-component differentiation.
Polyphenylene ether multi-component polymers are divided into:Modified polyphenylene ether multi-component polymerwithThe second generation of PPO series of multi-component polymers。Next, Xiao Ai will explain these two types of polyphenylene ether multi-component polymers in detail.
OnePolystyrene and PPO blending modification
Polystyrene blended with PPO modified products (trade name "NORYL"), is passedSimple mechanical blendingmade.
Heat resistancethan unmodified PPOSlightly worse, which is comparable to PC. Melt liquidityGot itMuch improvedExcellent molding processabilityInexpensive。Other properties are basically close to those before modification.
IIPS grafted PPO
Graft modificationPolyphenylene ether, represented by "Xyron" of PS grafted PPO.
The water absorption rate of the product is much lower than that of other engineering plastics, and the physical and mechanical properties and dimensional stability of the product are not affected by moistureExcellent resistance to hot waterWater vapor resistance
xyron”Impact strengthwithRigid equilibriumYes in all engineering plasticsThe best, and in the case of elevated temperature, its mechanical strength decreases lessIt is suitable for long-term use at high temperatures
IIIThe second generation of PPO series of multi-component polymersdevelopments
Under the action of compatibilizers,PPO is composed of other engineering plasticsMulti-component polymers, known as the second-generation PPO series multi-component polymers.
PPO PA, PPO PBT, PPO PPS, PPO PTFE, etc. have entered the practical stage in the mid-80s of the 20th century.
ppo/paIt is the successor to PPO PS multi-component polymersFastest growingThe most varietyPPO multi-component polymers.
FourthppowithPA blending
PPO and PA blends, availableImprovementstheProcessability and formability, in addition,Impact strengthElongation at breakAll obtainedSignificantly improved
with PPOBlended nylonYespa6pa66pa-mxd6withpa12Wait.
Polyphenylene ether is available in addition to the usual PPOMaleic anhydrylated PPOwithPPO modified with trimellitic anhydride oxide, which aims to improve polyphenylene ether multi-component polymersHeat deflection temperaturewithImpact strength
Fiveppowith other engineering plasticsBlending
ppowith PPSPolyphenylene sulfideBlending, yesImprovePPOHeat resistancewithSolvent resistance
ppowithPTFE blending, mainly forImprovePPOAbrasion resistance, the coefficient of friction is 05-0.21。
ppo/pbtMulti-component polymersThe biggest feature, which is the size and physical and mechanical properties of the productIt does not change due to water absorption。At the same time,Heat resistanceThe impact strength is high, suitable to doElectrical and electronic parts