Dysgeusia (/dÉªsËÉ¡uËÊÉ/ or /dÉªsËÉ¡juËziÉ/) or parageusia is a distortion of the sense of taste. Dysgeusia is also often associated with ageusia, which is the complete lack of taste, and hypogeusia, which is the decrease in taste sensitivity. An alteration in taste or smell may be a secondary process in various disease states, or it may be the primary symptom.
There are two main types of plastics â. Thermoplastics which are softened by heat and can be moulded. (Injection moulded, blow moulded or vacuum formed). Good examples are acrylic, polypropylene, polystyrene, polythene and PVC. Thermosets which are formed by ha heat process but are then set (like concrete) and cannot change shape by reheating.
These chemicals, as well as styrene, are called monomers. The Monomers are chemically bonded into chains called polymers. The properties and characteristics of these polymers vary greatly. Below are the different types of plastics with their properties and common uses. Polypropylene has relatively poor impact strength, but excellent compatibility with weak and concentrated acids, bases and alcohol.* Polypropylene is commonly used to make bottles, vials, pumps, funnels and clothing.