Table of Contents
What is the chemical name for Dacron?
Dacron is a thermoplastic polymer which has a chemical name, polyethylene terephthalate.
What is the structure of Buna S?
| Polymer | Structure of monomer | |
|---|---|---|
| i | Buna-S | CH2 = CH – CH = CH2 |
| C6H5CH = CH2 | ||
| ii | Buna-N | CH2 = CH – CH = CH2 |
| CH2 = CH – CN |
Which monomer is present in Dacron?
ethylene glycol
The monomeric units involved in the production of dacron are ethylene glycol and terephthalic acid. These monomers undergo a condensation reaction to form the monomeric unit of dacron.
How is Dacron prepared explain?
Dacron is obtained by condensation polymerization of ethylene glycol and terephthalic acid with the elimination of water molecules. The reaction is carried out at 420 – 460 K in presence of a catalyst consisting of a mixture of zinc acetate and antimony trioxide.
What is structure of Bakelite?
Bakelite is a polymer made up of the monomers phenol and formaldehyde. This phenol-formaldehyde resin is a thermosetting polymer. We cannot deny the presence of polymers in our lives. We are surrounded by objects, most of which, some way or the other have a polymer associated with them.
What type of polymer is Dacron?
Dacron is a polyester, formed by the condensation polymerization of a diol and a diacid. Dacron is a linear polymer that usually contains about 80 units per chain, a solid which can be melted without decomposition.
What is the structural formula of Buna and rubber?
| Polymers | Monomer Structures | |
|---|---|---|
| (i) | Buna-S | CH2=CHCH=CH2 |
| C6H5CH=CH2 | ||
| (ii) | Buna-N | CH2=CHCH=CH2 |
| CH2=CHCN |
Which of the following is the example of Dacron?
Dacron (Terylene) is an example of polyster formed by the cndensation of ethylene glycol and terephthalic acid.
How is Terylene or Dacron prepared?
Dacron (Terylene) is obtained by the condensation polymerization of ethylene glycol (1,2-Ethanediol) and dimethylterephthalate. Transesterification followed by polymerization gives terylene.
Why is Bakelite a thermosetting polymer explain with structure?
Bakelite contains cross links, or heavily branched polymer chains. Bakelite polymer, upon heating is hardened and cannot be softened again. Hence, it is a thermosetting polymer.
Is Dacron addition polymer?
(1) Addition polymerization, examples: PE, PVC, PTFE, etc. Dacron is a polymer, which is formed from the condensation polymerization of ethylene glycol and terephthalic acid. Hence, Dacron is obtained by the condensation polymerization of terephthalic acid and ethylene glycol.