What is the difference between PP and PS?

- May 11, 2020-

   Polypropylene (PP) is considered to be the safest of all plastics, this is a robust plastic that is heat resistant. Because of its high heat tolerance, Polypropylene is unlikely to leach even when exposed to warm or hot water. This plastic is approved for use with food and beverage storage.

 

   Polypropylene (PP) is a thermoplastic “addition polymer” made from the combination of propylene monomers. It is used in a variety of applications to include packaging for consumer products, plastic parts for various industries including the automotive industry, special devices like living hinges, and textiles.

 

   Polypropylene (PP) is considered to be the safest of all plastics, this is a robust plastic that is heat resistant. Because of its high heat tolerance, Polypropylene is unlikely to leach even when exposed to warm or hot water. This plastic is approved for use with food and beverage storage

 

  Polystyrene (PSplastic is a naturally transparent thermoplastic that is available as both a typical solid plastic as well in the form of a rigid foam materialPS plastic is commonly used in a variety of consumer product applications and is also particularly useful for commercial packaging

 

  Polystyrene (PS)  is a synthetic aromatic hydrocarbon polymer made from the monomer known as styrene. Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and rather brittle. It is an inexpensive resin per unit weight.

 

  Polystyrene homopolymer, known as “crystal" polystyrene in the trade, is an amorphous, colorless, and transparent commodity thermoplastic. It is rigid, brittle, relatively hard and has excellent gamma radiation resistance, good electrical properties but has poor chemical and UV resistance.

 

    PP PS can be recycled.


   The key difference between polystyrene and polypropylene is that the monomer of polystyrene is styrene while the monomer of polypropylene is propylene. The pendant group of polystyrene is a phenyl group; on the other hand, the pendant group of polypropylene is a methyl group.