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Polystyrene (PS)
Polystyrene (PS) is a polymer synthesized from styrene monomers by free radical addition polymerization, and its chemical formula is (C8H8)n. It is a colorless and transparent thermoplastic with a glass transition temperature higher than 100°C, so it is often used to make various disposable containers that need to withstand the temperature of boiling water, as…
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Polyvinyl chloride (PVC)
Polyvinyl chloride (PVC) is the third largest synthetic polymer plastic in the world (after polyethylene and polypropylene ), with an annual production of about 40 million tons of PVC. PVC is a polymer formed by the polymerization of vinyl chloride monomer (VCM) in the presence of initiators such as peroxides and azo compounds or under…
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Polyethylene terephthalate (PET)
Polyethylene terephthalate (PET), with the chemical formula (C10H8O4)n, is obtained by ester exchange of dimethyl terephthalate with ethylene glycol or esterification of terephthalic acid with ethylene glycol to synthesize dihydroxyethyl terephthalate, followed by polycondensation. It is a crystalline saturated polyester, a milky white or light yellow, highly crystalline polymer with a smooth and glossy surface.…
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Low density polyethylene (LDPE)
Low-density polyethylene, also known as high-pressure polyethylene (LDPE), is the lightest variety of polyethylene resin. It is milky white, tasteless, odorless, non-toxic, and matte waxy particles. It has good softness, extensibility, electrical insulation, transparency, easy processing, and certain air permeability. It has good chemical stability and is resistant to alkali and general organic solvents. Overview…
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Linear low-density polyethylene (LLDPE)
Linear low-density polyethylene (LLDPE) is a molecular structure formed by copolymerization of ethylene and a small amount of α-olefin on the main chain of linear ethylene with very short comonomer branches. Linear low-density polyethylene is a non-toxic, tasteless, odorless milky white particle with a density of 0.918~0.935g/cm³. Compared with LDPE, it has higher softening temperature…
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General purpose polystyrene (GPPS)
Polystyrene, referred to as PS. PS is a thermoplastic non-crystalline resin, which is polymerized from styrene monomers. It can be polymerized by a variety of synthetic methods. The main methods used in industry are bulk polymerization and suspension polymerization. PS is mainly divided into general-purpose polystyrene (GPPS, commonly known as transparent polystyrene), high-impact polystyrene (HIPS,…
