PMMA (Poly methyl methacrylate ) does not form through step growth polymerisation.
- Polythene and Orlon are addition polymers formed by chain growth polymerization. - Polythene as the name suggests has is made up of only one monomer that is ethane. - Orlon is also called acrilan.
Teflon is a chain growth polymer as the molecules of tetrafluoroethylene (monomer) simply add together to form the polymer. Hence Option A is the correct answer.
A condensation polymer among the following is: i) Teflon ii) Polystyrene iii) Dacron iv) PVC. Dacron is a condensation polymer. The condensation polymers are formed by repeated condensation reaction between two different bi-functional or tri-functional monomeric units.
It is polyhydroxy butyrate -CO- β-hydroxy valerate. The monomers used are 3-hydroxy butanoic acid and 3- hydroxy pentanoic acid. It has an ester linkage. It is useful to mankind because it is biodegradable polymer and thus prevents environmental pollution.
Silk is protein fibre. Dacron is polyester fibre and Nylon-66 is polyamide fibre.
Terylene is formed by condensation of repeating units of bifunctional monomers to produce long-chain polymers. In this process, the monomers combine to form dimmers then trimers then oligomers, and finally polymers. So terylene is a step-growth polymer.
Making nylon from a diacid and a diamine is a step-growth polymerization. So is making nylon from an amino acid. Making nylon from lactams is usually a chain-growth polymerization.
Polyolefins. Many common addition polymers are formed from unsaturated monomers (usually having a C=C double bond). Examples of such polyolefins are polyethenes, polypropylene, PVC, Teflon, Buna rubbers, polyacrylates, polystyrene, and PCTFE.
It is a semicrystalline polyamide. Unlike most other nylons, nylon 6 is not a condensation polymer, but instead is formed by ring-opening polymerization; this makes it a special case in the comparison between condensation and addition polymers.
Nylon is a type of condensation polymer called a polyamide. Polyamides are created by reacting a type of monomer called a dicarboxylic acid together with another monomer called a diamine. The two monomers form an alternating chain, with water released as a side product of the reaction.
To properly control the polymer molecular weight, the stoichiometric imbalance of the bifunctional monomer or the monofunctional monomer must be precisely adjusted. If the nonstoichiometric imbalance is too large, the polymer molecular weight will be too low.
Step-Growth Polymerization:Step-Growth Polymerization is a type of polymerization which sees bi-functional & multifunctional monomers reacting to form dimers, then trimers, then oligomers and finally long chain polymers. Example: Polyethylene Terephthalate.
Neoprene and Teflon are formed by addition polymerization while terylene and nylon-6,6 are formed by condensation polymerization.
Cross-linking can be thought of as reducing the number of chain ends and, effectively, increasing the molecular weight of a polymer system [61].
The polyester Dacron and the polyamide Nylon 66, shown here, are two examples of synthetic condensation polymers, also known as step-growth polymers.
Dacron is formed by step growth polymerization of monomer units.
Cellulose and Starch are examples of step growth polymerisation and nucleic acid is DNA polymerisation . whereas polystyrene is Chain growth polymer which is produced by chain growth polymerisation. Hence, polystyrene is Chain growth polymer which is produced by chain growth polymerisation.
