synthetic resin
Học thuậtThân thiện
Definition
Noun: A synthetic resin is a manufactured, polymeric material, typically derived from petrochemicals, that is viscous or solid in its raw, unprocessed state. It is characterized by its ability to be molded, cast, or extruded when soft and then set into a final rigid or flexible form. These resins are the fundamental building blocks for a vast array of plastics and composite materials.
Usage
Synthetic resins are used as the primary matrix or binder in the production of plastics, adhesives, coatings, and many industrial products. They are processed using methods like polymerization, where small molecules (monomers) are chemically bonded to form long chains (polymers).
Examples
- The durability of this car part comes from a tough synthetic resin.
- The artist used a clear synthetic resin to encapsulate the flowers in the tabletop.
- Epoxy is a common synthetic resin used in high-strength adhesives and coatings.
- The factory produces pellets of raw synthetic resin for shipment to plastic manufacturers.
Advanced Usage
- Thermosetting vs. Thermoplastic: Synthetic resins are broadly categorized into these two types. Thermosetting resins (e.g., epoxy, polyester) undergo an irreversible chemical cure and cannot be remelted. Thermoplastic resins (e.g., polyethylene, polystyrene) soften when heated and harden when cooled, allowing for recycling.
- In Composite Materials: Synthetic resins act as the binding matrix that holds reinforcing fibers (like glass or carbon fiber) together to form strong, lightweight composites.
Variants and Related Words
- Resin (n): A broader term that can refer to either natural plant secretions (like pine resin) or synthetic polymers. In industrial contexts, it often implies a synthetic resin.
- Polymer (n): The large molecule formed by linking monomers. All synthetic resins are polymers, but not all polymers are called resins (e.g., synthetic rubber).
- Plastic (n): The finished material or product made by processing a synthetic resin, often with additives like colorants or plasticizers.
Synonyms
- Artificial resin
- Polymer resin
- Plastic resin
Related Phrases and Compounds
- Synthetic resin adhesive: An adhesive whose main component is a synthetic resin (e.g., urea-formaldehyde resin glue).
- Synthetic resin emulsion: A dispersion of synthetic resin particles in water, used in paints and coatings.
- Ion-exchange resin: A specific type of synthetic resin designed to trap ions from solutions, used in water purification.
Noun
- a resin having a polymeric structure; especially a resin in the raw state; used chiefly in plastics