Testing plays a critical role in the life cycle of a polymer, from the raw material to the compound through to the semi-finished and finished product. Each stage has different test requirements, and each end user may require a different test solution depending on their role. Chemical testing of polymers and plastics is required to ensure that a material is suitable for its intended application. Polymer chemical testing is used to identify fundamental structural information including as molecular weight, molecular weight distribution and information on branching. Polymer analysis and testing employs both physical and analytical methods to verify the chemical, mechanical, and thermal properties of a polymeric material. These properties are instrumental in making sure that the polymer part will perform as required by the end user. The physical and mechanical testing of polymers is a vital part of the product development and production process. Mechanical, thermal, optical, rheological behaviour and climate testing allow the developers to better understand their product, and introduce stronger quality control.