Polystyrene is a common thermoplastic polymer made from the aromatic monomer styrene with good formability. It is widely used in automotive electrical & electronic connector systems. This book presents current research in the study of polystyrene including polystyrene attrition during chemical engineering processes; the biodegradability of polystyrene; the role of adhesion mechanisms of particles on modified polypropylene; direct fluorination of polystyrene; the applications of polystyrene into various sensing platforms; electrospun polystyrene fibres & superhydrophobic surfaces & the synthesis of end-functionalised syndiotactic polystyrene.