What type of polymerization produces polystyrene?
radical vinyl polymerization
Polystyrene is a vinyl polymer. Structurally, it is a long hydrocarbon chain, with a phenyl group attached to every other carbon atom. Polystyrene is produced by free radical vinyl polymerization, from the monomer styrene.
What is isotactic polystyrene?
Isotactic Polystyrene: They consist of long hydrocarbon chains, with a phenyl group connected to every other carbon atom. The Syndiatactic form is highly regular and crystalline. Atactic polystyrene is irregular and amorphous (disordered) and the Isotactic form is semi-crystaline.
What is a isotactic polymer?
Isotactic – An isotactic polymer is one in which all of the pendant groups are located on the same side of the hydrocarbon backbone chain. A popular form of polypropylene that is commonly marketed is an example of an isotactic polymer. Polystyrene is an example of an atactic polymer.
Is polystyrene a polymerization?
Polystyrene is an addition polymer that results when styrene monomers interconnect (polymerization).
How is polystyrene produced?
Polystyrene is made in a process known as suspension polymerization. After styrene is produced by combining ethylene and benzene, it is merged with water and a mucilaginous substance to form droplets of polystyrene.
Is EPS insulation safe?
Polystyrene insulation (EPS) has very poor fire resistance but is better if, like most modern insulation, it has a fire retardant added to it. It would probably contain a fire retardant. PIR and PUR (polyurethane foam) have reasonable fire resistance and phenolic foam has a high fire resistance.
What is the difference between Styrofoam and polystyrene?
Styrofoam is a form of polystyrene. The key difference between polystyrene and Styrofoam is that the polystyrene is a form of synthetic aromatic hydrocarbon polymer whereas the Styrofoam is a commercial brand of polystyrene.
What is isotactic and syndiotactic?
If all the methyl groups lie on the same side of the chain, the polymer is called isotactic. If the methyl groups alternate in a regular fashion from one side of the chain to the other, the polymer is syndiotactic.
How are isotactic polymers?
Atactic, Isotactic, and Syndiotactic Polymers Atactic polymers form from radical chain polymerization. These polymers have branches that result from hydrogen abstraction processes. Both isotactic and syndiotactic forms of polymers are produced with catalysts designed by K. Ziegler of Germany and G.
Is polystyrene a homopolymer or copolymer?
Polystyrene is typically (but not always) a homopolymer meaning that it is composed only of the monomer styrene in combination with itself. Depending on the type of PS it could be classified as a “thermoplastic” or a “thermoset” material.
Where is polystyrene used?
polystyrene, a hard, stiff, brilliantly transparent synthetic resin produced by the polymerization of styrene. It is widely employed in the food-service industry as rigid trays and containers, disposable eating utensils, and foamed cups, plates, and bowls.
