PS sheet polystyrene

Date:2020-11-14 15:44:27 星期六

Polystyrene PS sheet refers to a polymer synthesized fr […]

Polystyrene PS sheet refers to a polymer synthesized from styrene monomer through radical addition polymerization. The English name is Polystyrene, and the Japanese name is Polystyrene for short. It is a colorless and transparent thermoplastic with a glass transition temperature higher than 100 degrees Celsius, so it is often used to make various disposable containers that need to withstand the temperature of boiling water, as well as disposable foam lunch boxes.

Polystyrene structure simple formula: one CH-CHZ-}nC6HS Density: 1050kg/m3 Conductivity: (a) 1016S.l”m Thermal conductivity: 0.08 Young's modulus: (E) 3000-3600MPa tensile strength : (At) 46 stone 0MPa elongation length: 31% Charpy impact test: 2-5kjjm&suPZ; glass transition temperature: 80-IO0oC thermal expansion coefficient: (a) 8 * still, K heat capacity: (c) 1.3kJ/ (k crisp) Water absorption: (ASTM) 0.0 in 0.1 degradation: 280oC meaning Polystyrene refers to a polymer synthesized from styrene monomer through free radical addition polymerization. The English classification of polystyrene (Ps) includes ordinary polystyrene Ethylene, expanded polystyrene (EPS), high impact polystyrene (HIPS) and syndiotactic polystyrene (SPS). Ordinary polystyrene resin is non-toxic, odorless, colorless transparent particles, like a glass-like brittle material, its products have extremely high transparency, light transmittance can reach more than 90%, PS sheet has good electrical insulation performance, easy Coloring, good processing fluidity, good rigidity and good chemical resistance. The disadvantages of ordinary polystyrene are its brittleness, low impact strength, stress cracking, poor heat resistance and boiling water resistance. Properties Ordinary polystyrene resin is an amorphous polymer. The side group of the PS sheet molecular chain is benzene ring, and the random arrangement of bulky side group is benzene ring determines the physical and chemical properties of polystyrene, such as high transparency . Large rigidity. High glass transition temperature, brittleness, etc. Expandable polystyrene is made by impregnating low-boiling physical foaming agent in ordinary polystyrene. It is heated and foamed during processing, and it is specially used as a foam plastic product. High impact polystyrene is a copolymer of styrene and butadiene, and butadiene is the dispersed phase, which improves the impact strength of the material, but the product is opaque. Syndiotactic polystyrene has a syndiotactic structure and is produced using metallocene catalysts. The developed new polystyrene varieties have good performance and belong to engineering plastics.