Crystalline - describing the areas in a polymer where the chains are closely packed in a regular way

Degradation - a harmful change in the appearance, physical properties or chemical structure of a plastic

Extrusion moulding - a method to form thermoplastic materials into continuous sheeting, film, tubes, rods and filaments, and to coat wires, cables and cords; typical products include drain pipes, garden hoses

Injection moulding - a high-volume production technique predominantly used for thermoplastics; typical products include model kits, bottle crates, car bumpers, gear wheels, telephone cases, plastic chairs and

Vacuum forming - a method moulding objects from softened thermoplastic sheets; typical products include chocolate box trays, refrigerator linings, packaging trays, baths and acrylic sinks

Vulcanization - a process of heating natural rubber with sulphur