What is the process called when two polymer chains are joined together?

1.1. In addition polymerization (sometimes called chain-growth polymerization), a chain reaction adds new monomer units to the growing polymer molecule one at a time through double or triple bonds in the monomer.

What happens at the end of a polymer chain?

Chain termination is any chemical reaction that ceases the formation of reactive intermediates in a chain propagation step in the course of a polymerization, effectively bringing it to a halt. a non-propagating species without the formation of a new chain carrier.

What is the main material included in polymers?

Typically based on the element carbon, polymer molecules are made from simple, oil-based raw materials. The starting materials for polymers are called monomers and they are small molecules. These small molecules go through a process called polymerization which combines them and forms very large molecules or polymers.

How are dendrimers made?

Dendrimers are constructed by the successive addition of layers to the branching groups. The synthesis of dendrimers involves a core molecule with branching groups to which other branching molecules are added (see figure below) in layers. Each new layer is called a generation.

When 2 or more join together a polymer forms?

Co-polymers can be formed using two or more different monomers. And two or more polymers can be combined to produce an alloy, or blend, that displays characteristics of each component.

Which of the following has cross linked polymer chains?

Bakelite has cross- linked polymer chains.

What is meant by end group?

Definition of end group : a group at the end of a chain of a molecule especially : a functional group at the end of the chain of a linear polymer the amino and carboxyl end groups in a polypeptide.

How end groups of polymer affects viscosity?

Polymer viscosity is affected by a number of factors, such as the salinity, temperature, concentration, molecular weight, and shear rate. The polymer concentration has a direct relationship with the polymer viscosity. The polymer viscosity increases when the polymer concentration increases, as shown in Figure p27.

How are polymers manufactured?

A polymer is a large molecule made up of smaller, joined-together molecules called monomers. Monomers join together to make polymer chains by forming covalent bonds—that is, by sharing electrons. Other bonds then hold the groups of chains together to form a polymer material.

How is dendrimer different from a polymer?

Dendrimers and dendrons are monodisperse and usually highly symmetric, spherical compounds. Also, it is possible to make dendrimers water-soluble, unlike most polymers, by functionalizing their outer shell with charged species or other hydrophilic groups.

How does a dendrimer work?

Dendrimers for drug delivery are employed using two approaches: (i) formulation and (ii) nanoconstruct. In the formulation approach, drugs are physically entrapped in a dendrimer using non-covalent interactions, whereas drugs are covalently coupled on dendrimers in the nanoconstruct approach.