Definition

Noun: 1. A chemical bond that connects one polymer chain to another: In chemistry and materials science, a cross-linkage is a bond, atom, or short chain of atoms that links two longer chains (polymer chains) in a complex molecule or material. This connection creates a networked structure, altering the physical properties of the material, such as making it harder, more rigid, or less soluble.

Usage and Examples

• Noun:
  • The vulcanization of rubber involves the formation of cross-linkages between polymer chains, making it more elastic and durable.
  • The strength of the gel is due to the numerous cross-linkages within its structure.
  • Scientists studied the cross-linkage in the protein to understand its stability.

Advanced Usage

• In Biochemistry: Refers to bonds connecting different parts of a biomolecule (like DNA or proteins), which can affect function and structure.
  • DNA cross-linkage can be caused by certain chemicals and may interfere with replication.
• In Materials Science: Describes the intentional creation of links to modify material properties.
  • Controlling the degree of cross-linkage is key to designing polymers with specific characteristics.

Variants and Related Words

• Cross-link (noun/verb): The bond itself or the act of forming such bonds. Often used interchangeably with "cross-linkage."
  • The cross-links in the resin make it thermoset. (Noun)
  • The agent helps cross-link the polymers. (Verb)
• Cross-linked (adjective): Describes a material that has undergone this process.
  • Cross-linked polyethylene (PEX) is used in plumbing.

Synonyms

• Cross-bond: A less common synonym emphasizing the bonding aspect.
• Network bond: A descriptive term highlighting the resulting interconnected structure.

Related Phrases and Concepts

• Cross-linking agent (or cross-linker): A substance that facilitates the formation of cross-linkages.
  • Divinylbenzene is a common cross-linking agent in polymer chemistry.
• Degree of cross-linking: A measure of how many cross-linkages are present in a material.
  • A higher degree of cross-linking typically increases the material's melting point.

Noun

1. a side bond that links two adjacent chains of atoms in a complex molecule