What are cross-linked polymers explain with example?

Crosslinked polymers can be found in both synthetic polymers and as naturally occurring polymers. Crosslinks can be formed from chemical reactions using crosslinking reagents. The most common example of crosslinked polymers is the vulcanized rubber.

What is meant by Cross-Link?

Definition of cross-link : a crosswise connecting part (such as an atom or group) that connects parallel chains in a complex chemical molecule (such as a polymer)

Why is cross-linking in polymers important?

Chemical cross-linking has been widely used to alter the physical properties of polymeric materials, the vulcanization of rubber being a prototypic example. Linking of polymer chains through chemical linkages gives a material a more rigid structure and potentially a better-defined shape.

Which polymer is a cross-linked polymer?

Bakelite is a condensation polymer made from formaldehyde and phenol as shown below: Thus, the correct answer is option D i.e. Bakelite is a cross-linked polymer. Note: Cross-linked polymers are polymers in which long polymer chains are cross-linked together to create a three dimensional network.

What is cross linking immunology?

Crosslinking is the process of chemically joining two or more molecules by a covalent bond. Crosslinking reagents are used in a variety of techniques to assist in determining partners and domains of protein interactions, three-dimensional structures of proteins, and molecular associations in cell membranes.

What is cross linking agent?

Crosslinking Agents. Crosslinking is the formation of chemical links between molecular chains to form a three-dimensional network of connected. molecules. The vulcanization of rubber using elemental sulfur is an example of crosslinking, converting raw rubber from a weak plastic to a highly resilient elastomer.

Is PVC cross linked polymer?

Crosslinking polymer chains is an important way of diversifying the physical and chemical proper- ties of polymers. In the case of poly(vinyl chloride) (PVC) resin, crosslinking technology also was investigated as a major tool of enhancing applicability.

Is PVC a cross-linked polymer?

What has cross-linked polymers?

Bakelite has cross- linked polymer chains.

Is polyester cross-linked?

Cross-linking The double bond of unsaturated polyesters reacts with a vinyl monomer, usually styrene, resulting in a 3-D cross-linked structure. This structure acts as a thermoset.

Is melamine cross-linked polymer?

In the reaction of melamine and formaldehyde, the amine group reacts with formaldehyde as melamine has three amine groups. All amine groups can react, so melamine-formaldehyde is a cross linked polymer.

Is polyvinyl chloride a cross-linked polymer?

The polymer polyvinyl chloride is formed by the polymerization of polyvinyl chloride and it has a linear structure, so polyvinyl chloride is a linear polymer, not cross linked.

What does crosslinked polymer mean?

Answer Wiki. The cross-liked polymers are a kind of polymer, whose molecular chains are binded with each other. This bond is can either be a chemical or a physical one, but usually when we talk about a cross-linked polymer, we mean chemical bonds.

What is cross – link polymer?

Cross-link. These links may take the form of covalent bonds or ionic bonds and the polymers can be either synthetic polymers or natural polymers (such as proteins ). In polymer chemistry “cross-linking” usually refers to the use of cross-links to promote a change in the polymers’ physical properties.

What is polymer crosslinking?

Cross-linking refers to the joining of polymer chains with covalent bonds. Cross-linking can occur during polymer synthesis or later with the addition of atoms or molecules which will share electrons with a part of the polymer chain.

What is crosslinking in chemistry?

Cross-linking is an attachment of two chains of polymer molecules by bridges, composed of either an element, a group, or a compound, that join certain carbon atoms of the chains by primary chemical bonds, as indicated in the schematic diagram.