What is meant by alternating copolymer?
An alternating copolymer is a copolymer comprising two species of monomeric units distributed in alternating sequence. The arrangement -ABABABAB- or (AB)n thus represents an alternating copolymer.
What are copolymers give two examples?
What are Copolymers? A copolymer is a polymer that is made up of two or more monomer species. Many commercially important polymers are copolymers. Examples include polyethylene-vinyl acetate (PEVA), nitrile rubber, and acrylonitrile butadiene styrene (ABS).
What is the difference between an alternating copolymer and a block polymer?
A block copolymer is formed from two homopolymers linked to form a single polymer chain. Random copolymers consist of monomers randomly linked in a given polymer chain. Alternate copolymers form when different monomers are linked together in an alternating fashion.
Which of the following copolymers is the copolymer with regular alternating A and B units?
Which of the following copolymers is the copolymer with A and B units arranged in a repeating sequence? Explanation: Copolymers with A and B units arranged in a repeating sequence are periodic polymers as shown below. This sequence will repeat itself to form a polymer. 5.
In which type of co polymer the monomer units are arranged in the chain in alternating manner?
Since a copolymer consists of at least two types of constituent units (also structural units), copolymers can be classified based on how these units are arranged along the chain. Linear copolymers consist of a single main chain, and include alternating copolymers, statistical copolymers and block copolymers.
What is the difference between copolymers and polymer blends in terms of chemical structure explain with suitable examples?
Copolymers contain both monomer types within a single polymer chain (this occurs during synthesis), whereas polymer blends are made via mixing techniques (combination of multiple homopolymers, which generally occurs after synthesis).
Is Dacron a copolymer?
Dacron is copolymer prepared by condensation of methyl ester of terphthalic acid with ethylene glycol. The monomer of Dacron are: Terphthalic acid with ethylene glycol. It is used in the blending of cotton in clothing.
What are Homeo polymers and copolymers give one example for each?
Polythene, Teflon, PAN and nylon-6 are some examples of homopolymers. Thus, polythene is made from only one type of monomer unit which is ethylene. Buna-S, Buna-N, polyester, Bakelite and nylon-6,6 are some examples of copolymers.
What are Homeo polymers and copolymers?
If a polymer consists of only one kind of monomers then it is called a homopolymer, while a polymer which consists of more than one kind of monomers is called a copolymer.
Is NH CHR CO NA homopolymer or copolymer?
homopolymer
(−NH−CHR−CO−)n is obtained from a single monomer unit which is NH2−CHR−COOH. Hence it is a homopolymer.
What is the Homeo polymer?
A homopolymer is a polymer made from many copies of a single repeating unit. For example, a number of glycolic acid molecules can be conjugated as shown in Figure 17.12 to create the homopolymer poly(glycolic acid).
Is a homopolymer or copolymer?
How do addition and condensation polymerization differ?
Difference Between Addition And Condensation Polymerization
| Addition Polymerization | Condensation Polymerization |
|---|---|
| Monomers must have either a double bond or triple bond | Monomers must have two similar or different functional groups |
| Produces no by-products | By-products such as ammonia, water and HCl have produced |
How to copolymerize ethylene with maleic anhydride?
The copolymerization of ethylene with maleic anhydride was carried out with γ-radiation and a radical initiator, i.e., 2,2′-azobisisobutyronitrile and diisopropyl peroxydicarbonate under pressure at various reaction conditions. The homopolymerization of neither monomer was observed in this system.
What is the monomer reactivity ratio of ethylene in copolymer?
Since the composition of copolymer is independent of monomer molar ratio and the molar ratio of ethylene to maleic anhydride in the polymer is approximately unity, the monomer reactivity ratios were obtained as rE ≃ 0 and rM ≃ 0 for γ-ray-initiated polymerization at 40°C. Alternating copolymerization was, therefore, concluded to occur.
What is an alternating copolymer?
An alternating copolymer is a copolymer comprising two species of monomeric units distributed in alternating sequence. Aubrey D. Jenkins, Kurt L. Loening, in Comprehensive Polymer Science and Supplements, 1989
How does the composition of a polymer chain change during polymerization?
Since all polymer chains grow simultaneously, a change in instantaneous copolymer composition will be reflected in the composition of a copolymer chain along its backbone. Theoretically, the same is possible with other living polymerization techniques, such as anionic polymerization.
What is the purpose of producing copolymers?
2.3. 2 Copolymer Arrangements. Copolymers are essential to plastics industry as they provide means to combine properties of dissimilar materials creating new distinctive materials. Copolymers offer benefits that are not usually observed in polymers created from single species of monomers (homopolymers).
What are copolymers Shaalaa?
The polymers which have two or more types of repeating units are called copolymers. They are formed by the polymerization of two or more different types of monomers in presence of each other. The different monomer units are randomly sequenced in the copolymer.
How are copolymers different from other types of polymers?
Polymer vs Copolymer A polymer is a giant molecule built out of repeating units called monomers. A copolymer is a type of polymer which has a different arrangement of monomers than other polymers. Polymers can have only one monomer species. Copolymers essentially have more than one monomer species.
What are copolymers explain with example?
What are copolymers and explain it with examples?
A copolymer is a polymer that is made up of two or more monomer species. Many commercially important polymers are copolymers. Examples include polyethylene-vinyl acetate (PEVA), nitrile rubber, and acrylonitrile butadiene styrene (ABS).
It is important to make a distinction between true copolymers and polymer blends. Copolymers contain both monomer types within a single polymer chain (this occurs during synthesis), whereas polymer blends are made via mixing techniques (combination of multiple homopolymers, which generally occurs after synthesis).
Which of the following is the condition of ideal copolymerization?
Explanation: A copolymerization is said to be an ideal copolymerization when the chain radicals have equal preference to add one of the monomers over the other.