Condensation and Step-Growth Polymerization
Covers condensation and step-growth polymerization reactions, including polymers like nylon, terylene, bakelite, and their formation mechanisms.
Questions
Formation of nylons and polyesters are called step growth polymerization because:
- the polymers are formed by adding a monomer step by step
- the polymers are formed by condensation and monomers are joined by loss of simple molecules like water
- the monomers used for condensation are unsaturated molecules
- the polymers are formed by addition of a large number of free radicals formed by monomers
Terylene is a condensation polymer of ethylene glycol and:
- benzoic acid
- phthalic acid
- terephthalic acid
- salicylic acid
Which of the following is not true about polymers?
- Polymers are high molecular mass macro-molecules.
- Polymers may be of natural or synthetic origin.
- Condensation polymers are made up of one type of monomers only.
- They have high viscosity and do not carry any charge.
$X-(CH _2) _4-X \xrightarrow [{HOOC-(CH _2) _4-COOH}] {Y}:Condensation : Polymer$
The correct functional group $X$ and the reagent/reaction conditions $Y$ in the following scheme are:
- $X=COOCH _{3},\ Y=H _{2}/Ni/heat$
- $X=CONH _{2},\ Y=H _{2}/Ni/heat$
- $X=CONH _{2},\ Y=Br _{2}/NaOH$
- $X=CN,\ Y=H _{2}/Ni/heat$
Which of the following is condensation polymer?
- Polypropylene
- PMMA
- Glyptal
- Teflon
Bakelite is formed by:
- polymerization of phenol and formaldehyde
- polymerization of alcohol and acetaldehyde
- condensation of phenol and formaldehyde
- condensation of phenol and acetaldehyde
Which of the following monomers are unsuitable for condensation polymerization?
- hydroxy acids
- butane-dioic acid and glycol
- diamines and dicarboxylic acids
- propanoic acid and ethanol
Which of the following is not correct regarding terylene?
- Step - growth polymer
- Synthetic fiber
- Condensation polymer
- Dacron
- Thermosetting plastic
Which of the following is an example of condensation polymer?
- Teflon
- Melamine
- Nylon-6
- BUNA-S
Which of the following are condensation copolymers ?
- Nylon - $6$
- Nylon - $6, \:6$
- Dacron
- Glyptal
Which of the following is a step-growth polymer ?
- Polyacrylonitrile
- Polyisoprene
- Nylon
- Polythene
Polymer formation form monomers starts by:
- condensation reaction between monomers
- conversion of monomer to monomer ions by protons
- coordination reaction between monomers
- hydrolysis of monomers
Nylon is made by
- polymerization of polymers
- polymerization of monomers
- condensation co-polymers
- hydrolysis of polymer
Polythene is a polymer. The monomer of this is:
- Propene
- Isoprene
- Chloroprene
- Ethene
Fishing nets are made of
- rayon
- dacron
- nylon
- viscose rayon
The polymer formed by condensation of adipic acid and hexamethylene diamine is:
- Isoprene
- Rayon
- Terylene
- Nylon-$6, 6$
Which of the following polymers can be made by condensation polymerisation reaction?
- Dacron
- Nylon - $6,\: 6$
- Bakelite
- Polyethylene
Which of the following is/are not a condensation copolymer?
- Nylon-$6$
- Nylon-$6,6$
- Dacron
- PVC
Nylon-$6$ is prepared by linear condensation homopolymerization reaction of:
- caprolactum
- hexamethylene diamine and adipic acid
- $6$-aminohexanoic acid
- acrylonitrile