What is a bifunctional monomer?
Thus, a bifunctional monomer, i.e., monomer with functionality two, can link to two other molecules under suitable conditions. A polyfunctional monomer is one that can react with more than two molecules under the conditions of the polymerization reactions.
What do you mean by Tacticity?
Tacticity (from Greek τακτικός taktikos “of or relating to arrangement or order”) is the relative stereochemistry of adjacent chiral centers within a macromolecule. A tactic macromolecule in the IUPAC definition is a macromolecule in which essentially all the configurational (repeating) units are identical.
What does functionalization mean in chemistry?
Functionalization is the process of adding new functions, features, capabilities, or properties to a material by changing the surface chemistry of the material. It is a fundamental technique used throughout chemistry, materials science, biological engineering, textile engineering, and nanotechnology.
Is glycerine a trifunctional monomer?
Diarylborinic acids catalyze the formation of linear polyesters from glycerol, a trifunctional, carbohydrate-based monomer.
Which is trifunctional monomer?
The simple molecules that may become structural units are themselves called monomers; two monomers combine to form a dimer, and three monomers, a trimer. When the structural unit is trifunctional (has three bonding sites), a nonlinear, or branched, polymer results.
What is syndiotactic and isotactic?
If all the methyl groups lie on the same side of the chain, the polymer is called isotactic. If the methyl groups alternate in a regular fashion from one side of the chain to the other, the polymer is syndiotactic. The tacticity of a polymer can have a dramatic effect on its physical properties.
What is tacticity and its types?
Types of Tacticity The tacticity of a polymer is an important consideration because it affects its physical and chemical properties. There are three different types of tacticity in polymers, which are isotactic, syndiotactic, and atactic. Polystyrene is an example of an atactic polymer.
Which of the following is tri functional?
Which of the following is tri-functional? Explanation: Momethyl silicon chloride is tri-functional and gives cross-linking to the final polymer.
Why is surface functionalization?
Surface functionalization is an effective and often simpler way of altering the surface properties of a material or device to achieve specific goals such as inducing a desired bioresponse or inhibiting a potentially adverse reaction.