Table of Contents
- 1 How does polymers cross polymerized?
- 2 What are the factors affecting cross-linking in polymers?
- 3 What is a crosslinking mechanism?
- 4 How does cross-linking improve the strength of polymers?
- 5 How does crosslinking change the properties of polymer?
- 6 What process initiates cross linking between thermoset molecule chains?
- 7 What is cross – link polymer?
- 8 What is polymer crosslinking?
How does polymers cross polymerized?
Cross-linking in polymers occurs when primary valence bonds are formed between separate polymer chain molecules. Chains with only one type of monomer are known as homopolymers.
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.
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 a crosslinking mechanism?
Crosslinking is the process of chemically joining two or more molecules by a covalent bond.
How does cross-linking improve the strength of polymers?
By cross-linking, the structure of a polymer solution can be fixed. The resulting polymer networks (or gels) show elastic behavior and, depending on the system, good mechanical properties. Polymer networks are able to swell by uptaking water or organic solvents.
What physical changes occur during crosslinking?
Crosslinking agents tie together carbon atoms from different chains of the polymer, transforming what were once viscous linear segments into an insoluble gel network that no longer melts or flows like a typical thermoplastic.
How does crosslinking change the properties of polymer?
Cross-linking the polymer changes the chemical nature of the polymer if a chemical is used (in some cases there are physical cross-link can occur where the polymer chains interlink and are held via intermolecular interactions rather than chemical bonds).
What process initiates cross linking between thermoset molecule chains?
The cross linking of elastomers is achieved by a process called “vulcanisation”. Vulcanisation involves using a sulphur compound and high temperatures to initiate cross linking and thermosetting of the polymer.
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.