What is the material of ps? Ps is a plastic material, and its material is polystyrene, which is a thermoplastic. Specific varieties include ordinary polypropylene and high impact polystyrene. Polystyrene has the advantages of brightness, light weight, transparency, good fluidity, good processability, good dimensional stability, easy coloring and low price. Disadvantages are poor toughness and high brittleness.
Is ps material harmful to human body? PS plastic is toxic, and the plastic itself is not toxic, but there will be different chemical reactions in different situations. For example: PET plastics, harmful substances that will be hydrolyzed above 70℃; PVC plastic, which will produce hydrogen chloride in the sun, is discolored, has a pungent smell, is easily soluble in water and hydrochloric acid, and is highly corrosive; PS plastic, not resistant to high temperature.
Performance, advantages and disadvantages of PS plastics
Characteristics of polystyrene plastics:
1, mechanical properties
The structure of polystyrene molecule and its aggregate determines that it is a hard and brittle material, which shows brittle fracture under stress.
What material is ps? Is it poisonous?
2. Thermal characteristics
The characteristic temperatures of polystyrene are: brittleness temperature -30℃, glass transition temperature 80 ~ 105℃, melting temperature 140 ~ 180℃, and decomposition temperature above 300℃. Because the mechanical properties of polystyrene decrease obviously with the increase of temperature, the heat resistance is poor. The continuous use temperature is about 60℃, and the temperature should not exceed 80℃.
3. Electrical performance
Polystyrene has good electrical properties, and its volume resistivity and surface resistivity are as high as1016 ~1kloc-0/8, which are ω·cm and1015-10/respectively. The tangent value of dielectric loss angle is very low, which is not affected by frequency, ambient temperature and humidity.
Advantages and disadvantages of PS plastics:
Advantages: excellent electrical insulation (especially high-frequency insulation), colorless and transparent, light transmittance second only to plexiglass, coloring water resistance and good chemical stability. PS is widely used in the optical industry, mainly because of its high transmittance, which can be used to manufacture optical glass and optical instruments.
Disadvantages: the strength is average, but it is fragile, prone to stress embrittlement, and not resistant to organic solvents such as benzene and gasoline. It is suitable for making insulating transparent parts, decorative parts, chemical instruments, optical instruments and other parts.