As nouns the difference between polypropylene and silicone

is that polypropylene is a thermoplastic resin made by the polymerization of propylene - used for films, fibres, or moulding materials. Also known as polypropene while silicone is any of a class of inert, semi-inorganic polymeric compounds (polysiloxanes), that have a wide range of thermal stability and extreme water repellence, used in a very wide range of industrial applications, and in prosthetic replacements for body parts.