Polymer

Polymers are made up of very large molecules made up of many repeating units called monomers, which ultimately form this long polymer chain

PolyStyrene (PS)

Polystyrene (PS) is a synthetic polymer made from monomers of the aromatic hydrocarbon styrene. Polystyrene can be solid or fomed. General-purpose polystyrene is clear, hard, and brittle. As a thermoplastic polymer, polystyrene is in a solid (glassy) state at room temperature but flows if heated above about 100 °C, its glass transition temperature.and also  It has wide applications in various industries including packaging, construction, and automotive.

General Purpose PolyStyrene (GPPS)

General purpose polystyrene, abbreviated as “GPPS”, is made from the styrene monomer polymer through a suspension process. It is a solid product that is compressed into granules to produce a wide range of products. This material has high clarity and transparency. GPPS is a rigid and transparent thermoplastic polymer that is highly versatile and easy to process. GPPS has excellent electrical insulation properties, is lightweight, and has good dimensional stability. It is commonly used in a wide range of applications such as packaging, household items, and office supplies.

Structure

GPPS is a thermoplastic polymer that is made from styrene monomer. The chemical structure of GPPS consists of a linear chain of styrene monomer units that are joined together by covalent bonds. The properties of GPPS can be modified by copolymerizing it with other monomers such as acrylonitrile, butadiene, Zinc or methyl methacrylate.

General Purpose Polystyrene properties

GPPS is highly resistant to moisture and has good electrical insulation properties. IT is a brittle material with low-impact strength. It has a tensile strength of 50-60 MPa and a flexural modulus of 2,200-2,500 MPa. GPPS has a glass transition temperature (Tg) of 85-105°C and a melting temperature (Tm) of 200-240°C. It has a heat deflection temperature (HDT) of 70-80°C under a load of 0.45 MPa.

Application

General Purpose Polystyrene (GPPS) is a versatile thermoplastic material that finds use in a variety of applications. Here are some of the most common applications of GPPS:

Packaging

GPPS is a popular choice for packaging materials due to its excellent transparency, rigidity, and moldability. It is commonly used to make food containers, disposable cutlery, and CD cases.  GPPS is also used in the production of blister packs, which are commonly used to package pharmaceuticals.

Consumer Products

GPPS is used in the production of various consumer products due to its excellent electrical insulation properties, lightweight, and dimensional stability. It is commonly used to make toys, cosmetic packaging, and household items such as hangers, trays, and organizers.

Building and Construction

GPPS is used in the construction industry due to its excellent insulation properties, lightweight, and dimensional stability. It is commonly used to make insulation foam boards, window frames, and light fixtures.

GPPS is also used in the automotive industry to make various parts such as instrument panels, door panels, and grilles due to its excellent moldability and dimensional stability.

Advantages
  • excellent moldability
  • good insulator of heat and electricity
  • versatile and cost-effective
  • clear visibility of the contents inside
  • Good dimensional stability
Disadvantages
  • low-impact strength
  • low thermal stability
  • non-biodegradable
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