hard rubber
Học thuậtThân thiện
Definition
Noun: * A hard, non-resilient material: A rigid substance created through the vulcanization of natural rubber, involving heating it with sulfur. This process transforms the soft, elastic raw rubber into a much harder and less flexible solid.
Usage
- As a material noun: "Hard rubber" is used to refer to the substance itself, often in manufacturing, engineering, or historical contexts.
- Early telephone handsets were often made from hard rubber.
- The comb is durable because it's crafted from hard rubber.
- As a modifier: It frequently acts as an adjective to describe objects made from this material.
- He replaced the worn hard-rubber grip on his walking stick. (Note: Often hyphenated when used as a compound modifier before a noun).
Advanced Usage
- Technical/Historical Context: The term is strongly associated with early plastics and 19th/early 20th-century manufacturing. It is a specific product of vulcanization, distinct from softer rubber compounds (like those in tires) or modern synthetic plastics.
- Vintage fountain pens with hard rubber barrels are highly collectible.
Variants and Related Words
- Ebonite: A synonym for hard rubber, especially when it is black and has a high polish, resembling ebony wood.
- The jewelry box was made of polished ebonite.
- Vulcanite: Another common synonym for hard rubber, directly referencing the vulcanization process.
- Vulcanization (n): The chemical process of treating rubber with sulfur and heat to increase its strength and stability.
- Vulcanize (v): To subject rubber to this process.
Synonyms
- Ebonite
- Vulcanite
Notes on Meaning
- The term specifically denotes the product (the hardened material), not the process. The process is called vulcanization.
- It is a compound noun. The adjective "hard" describes the specific type of "rubber," distinguishing it from soft, elastic rubber.
Noun
- a hard nonresilient rubber formed by vulcanizing natural rubber