Styrofoam vs. Polystyrene
Styrofoam and Polystyrene Definitions
Expanded polystyrene foam, such as is used in cups and packaging.
A rigid clear thermoplastic polymer of styrene that can be molded into objects or made into a foam that is used as thermal insulation.
A light resilient foam of polystyrene
(organic chemistry) A vinylic polymer of styrene, CH2CHphenyl.
(organic chemistry) An alkane chain of benzene molecules, RCH2CHphenylR.
A polymer of styrene; a rigid transparent thermoplastic;
Expanded polystyrene looks like a rigid white foam and is used as packing or insulation