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- Proteins are naturally occurring polymers formed by condensationreactions of amino acids, which have the generalstructureIn this structure, ¬R represents ¬H, ¬CH3, or anothergroup of atoms; there are 20 different natural amino acids,and each has one of 20 different R groups. (a) Draw the generalstructure of a protein formed by condensation polymerizationof the generic amino acid shown here. (b) When only afew amino acids react to make a chain, the product is called a“peptide” rather than a protein; only when there are 50 aminoacids or more in the chain would the molecule be called a protein.For three amino acids (distinguished by having three differentR groups, R1, R2, and R3), draw the peptide that resultsfrom their condensation reactions. (c) The order in which theR groups exist in a peptide or protein has a huge influence onits biological activity. To distinguish different peptides andproteins, chemists call the first amino acid the one at the “Nterminus” and the last one the one at…Alternating poly(styrene-ethylene) copolymer; random poly(vinyl chloridetetrafluoroethylene) copolymer State whether it is possible to determine whether one polymer is more likely to crystallize than the other. If it is possible, note which is the more likely and then cite reason(s) for your choice. If it is not possible to decide, state why.Proteins are naturally occurring polymers formed by condensationreactions of amino acids, which have the generalstructure In this structure, — R represents — H, — CH3, or anothergroup of atoms; there are 20 different natural amino acids,and each has one of 20 different R groups. (a) Draw the generalstructure of a protein formed by condensation polymerizationof the generic amino acid shown here. (b) When only afew amino acids react to make a chain, the product is called a“peptide” rather than a protein; only when there are 50 aminoacids or more in the chain would the molecule be called a protein.For three amino acids (distinguished by having three differentR groups, R1, R2, and R3), draw the peptide that resultsfrom their condensation reactions. (c) The order in which theR groups exist in a peptide or protein has a huge influence onits biological activity. To distinguish different peptides andproteins, chemists call the first amino acid the one at the “Nterminus” and the last one the…
- Poly(ethylene terephthalate), known as PET or industrially as Dacron, is a polyester synthesized through a condensation reaction between two bifunctional monomers. The monomers, ethylene glycol and terepthalic acid, are given. Add bonds and remove atoms as necessary to show the structure of a two repeat unit portion of a longer polymer chain of PET.Write chemical reactions illustrating a polymerization mechanism involving the monomers listed below. Would the reactions be considered step growth or chain growth? Explain and supportShown below is the ε-caprolactone monomer where the biopolymer polycaprolactone (PCL) is synthesized from. (a) What is the functionality of the monomer? (b) What is polymerization mechanism to produce PCL? (c) Draw the repeating unit of the homopolymer given that the functional group is located at the terminal of the hydrocarbon chain
- Write the chemical structure of the alternating copolymer which is synthesized by the co-polymerisation 9f styrene and vinyl alcohol. The structure should illustrate at least 4 monomer units. Which italicized qualifier applies for this copolymer.List down the factors that affect the cationic polymerization.List down the classification of Biodegradable polymers with it's importance and function.
- Kel-F is an addition polymer with the following partial structure. What is the monomer used to prepare it?1. (a)Differentiate polypropylene and Polyurethane in term of(i)molecular structure(ii)behaviour upon heating(iii)classifification or type of polymer(iv)based on their structure, draw the stress-strain curve of both polymer.(b) Composites can be used in many applications such as sport equipment, automotive industry and Oil and gas industry.(i)Suggest one composites materials and parts/component used in these applications.(ii)Why the composite material is used for those parts as stated your answered aboveWhich representation(s) show polymer structures that are likely to result in rigid, hard materials and those that are likely to result in flexible, stretchable, soft materials?
