Main Product
Polystyrene
Segment
Chemicals
Main-Family
Polymers
Sub-Family
Styrenic Polymers
Physical State

Solid

Sub-Product
General Purpose Polystyrene
Abbreviation
PS | GPPS
Alt. Names
Poly(1-phenylethene); Crystal Polystyrene; General Purpose Polystyrene
Description

The only commercially important form of Polystyrene, also known as General-Purpose Polystyrene, is atactic, which Polymerization is initiated with Free Radicals.

In atactic Polystyrene, the Phenyl Groups are randomly distributed on both sides of the Polymer Chain (Fig. 1). This random positioning prevents the Chains from aligning with sufficient regularity to achieve any crystallinity. The Plastic has a glass transition temperature Tg of ~90 °C.

Figure 1 - Polystyrene Tacticity

Source: Wikipedia, Polystyrene

GPPS is a clear, hard, and brittle homopolymer of Styrene. As a thermoplastic polymer, it is in a solid (glassy) state at room temperature but flows if heated above about 100 °C. It is a poor barrier to air and water vapor and has a relatively low melting point. Polystyrene is naturally transparent, but can be colored with colorants.

Polystyrene is commonly injection molded, vacuum formed, or extruded. Uses include protective packaging (such as packing peanuts and in the jewel cases used for storage of optical discs such as CDs and occasionally DVDs), containers, lids, bottles, trays, tumblers, disposable cutlery, in the making of models, and as an alternative material for phonograph records. Polystyrene is also used in some polymer-bonded explosives (PBX).

Source: Wikipedia, Polystyrene

Link
https://en.wikipedia.org/wiki/Polystyrene
Identifiers

logo CAS Number
9003-53-6
logo EC Number
500-008-9
logo ECHA InfoCard
105.105.519
logo IUPAC Name
Poly(1-phenylethene)
Chemical Data

Chemical Formula

(C8H8)n

Molecular Weight (g/mol)
200000
Boiling Point (°C)
430
Melting Point (°C)
240
Sulfur Content (wt%)
0
Specific Gravity
1.05
Properties

Default
Status
A
System Info

Update by
UserPic  Kokel, Nicolas
Updated
11/20/2023 10:51 AM
Added by
UserPic  Kokel, Nicolas
Added
2/21/2021 9:54 PM
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