What are cross-linked polymers used for?

Synthetically crosslinked polymers have many uses, including those in the biological sciences, such as applications in forming polyacrylamide gels for gel electrophoresis. Synthetic rubber used for tires is made by crosslinking rubber through the process of vulcanization. This crosslinking makes them more elastic.

Why is crosslinking important in certain applications?

Introduction. 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.

What are some examples of cross-linked polymers?

Examples of cross-linked polymers include: Polyester fiberglass, polyurethanes used as coatings, adhesives, vulcanized rubber, epoxy resins and many more.

What are the advantages to crosslinking in polymers?

It results in improved resistance to stress cracking and better fluid resistance. There is generally little or no change in flame resistance, electrical characteristics, or thermal stability. One of the most misunderstood results of crosslinking is its effect on long term thermal stability.

What is cross linking what is the function of crosslinking?

– Cross linking is used to refer the process of linking one site to another site and provide a way to allow the accessing to it. – It doesn’t need to be owned by the same person as it provides the methods that have been be built on the Internet.

What are the effects of cross linking in polymers quizlet?

The effect of cross-linking in polymers is that it significantly reduces the solubility of a polymer, highly cross-linked polymers are almost impossible to dissolve in any solvent. Also, the more cross-links present in a polymer, the more dense and structurally rigid the material will be.

What is crosslinking in polymers?

Put simply, crosslinking involves a chemical reaction between polymer chains to link them together. Crosslinking can influence several end properties across most applications, including: Coating chemical resistance. Polymer flow properties – block and print resistance. Coating toughness.

Why does cross linking make polymers more elastic?

At first, adding cross-links between polymer chains makes the polymer more elastic. The vulcanization of rubber, for example, results from the introduction of short chains of sulfur atoms that link the polymer chains in natural rubber. As the number of cross-links increases, the polymer becomes more rigid.

What is the major purpose of cross-linking in polymers quizlet?

Cross-linking is the formation of connections between the long-chain molecules in a polymer. It causes the polymer structure to be permanently altered. If the amount of cross-linking is low, the polymer is transformed into an elastomer; if cross-linking is significant, the polymer is transformed into a thermoset.

What are the effects of cross-linking in polymers Che 233?

What is the effect of crosslinking in polymers? Crosslinking makes the structure more dense and structurally rigid. It also reduces the solubility of the polymer. The more cross-links, the less likely it is that the polymer will dissolve in any solvent.

What are the factors affecting cross linking in polymers?

During crosslinking, counterions used in the crosslinking process diffuse into the polymer and react forming intermolecular or intramolecular linkages. Main factors which affect chemical crosslinking are the concentration of the crosslinking agents and the reaction duration.