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The performance of PA/PPS alloy and characteristics

by:CSSSLD     2021-01-23
Polyphenylene sulfide is a kind of comprehensive performance of special engineering plastics and its characteristics are as follows: 1. High heat distortion temperature, long-term continuous working temperature is 200 - 240℃。 2. Good chemical stability, PPS at 200 ℃, does not dissolve in any solvent. 3. PPS resin has high strength, high rigidity, and has good fatigue resistance and creep resistance. 4. PPS is flame retardant polymer, vertical combustion grade V - Level 0, oxygen index 44% 53%. 5. Good dimensional stability, even under the environment of high temperature, moisture absorption after the size almost the same. 6. PPS good liquidity, forming narrow, is good for thin wall and precision injection molding processing. 7. PPS are the shortcomings of liquidity is too good, pure PPS not injection molding, fibre reinforced products luster.

due to the effect of elastic M, improve the impact toughness of the alloy, and other mechanical performance degradation, this is due to the dispersed phase particles embedded in the PA6 matrix, at the same time ABS dispersed phase particles and rubber elastomer phase particles are less than matrix modulus, thus in the direction perpendicular to the stress of pellet produced great stress concentration on the equator, makes the stress imposed by the stress is greater than the actual, so cause the PA6 / ABS - g - MAH/elastomer M - g - MAH alloy in addition to the impact toughness other mechanical properties are dropped.

with PPS in PA66 blends, and can improve the tensile strength, bending strength of PA66, hot strength, but can make PA66 impact strength decreases, so the PPS dosage shoulds not be too high. PPS and the solubility parameters of PA66 was 12, respectively. 5 to 13. 6. In theory there should be a certain compatibility, but actually to get high-performance alloy still need to add some compatilizer. PA/ABS alloy is a combination of PA heat resistance, chemical resistance, and combined the toughness of ABS, rigid. Has good impact strength, thermal buckling, liquidity and good appearance.

in electrical products, automobiles, furniture, sporting goods and other fields has a very broad market. PA/ABS alloy, mainly include the PA6 / ABS, PA1010 / ABS alloy, the PA6 / ABS get practical application due to its cheaper price. PA6 and ABS is incompatible system, and its poor mechanical properties of the blend, the general should be adding compatilizer. PA6 with ABS alloy is crystallization/noncrystalline blend system, system of morphological structure is microscopic phase separation condition.

due to poor liquidity of ABS, so on PA6 molecules grafted ABS, to some extent affected the alloy liquid. In PA6 / ABS alloy, PA6 and have bigger influence on the performance of ABS add certain elastomer in PA6 / ABS alloy can improve the toughness of the alloy, used for PA6 / ABS system with SBS and SEBS elastomer, MBS thermoplastic elastomer, but in the elastomer and the compatibility of PA6 is bad, will MAH or graft acrylic acid and its derivatives and thermoplastic elastomer, the group with can react with PA6.

the performance and features of PPO/PA alloy: join in PA6, PA66, PPO, better taking advantages of both, overcome the shortcomings of each group, its characteristic has the following points: 1. It has excellent mechanical properties and heat resistance, water imbibition is less than PA6 alloy, 2 - notched impact strength increased Three times. 2. Has a good injection molding processability, dimensional stability and spraying. 3. Good electrical insulation. 4. Good chemical resistance, the PA6 / PPO alloy good hydrocarbon, oil, detergent, oil corrosion resistance, is an ideal material to car parts.

compatibilizer is added to the system, can improve the compatibility with ABS and the dispersed phase size becomes small. PA6 / ABS alloy compatibilizer in the formula, dosage of ABS has a great influence on performance of alloy. Increase the ABS - g - MAH, the dosage of alloy liquid drop, heat distortion temperature and notched impact strength increased, ABS - g - MAH dosage increase, means that the system can response the anhydride groups increased, PA6 and ABS g - The possibility of a reaction between MAH increase.

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