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CHEM392A Chapter 2: chapter two notes.docx

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ultramarinefly312

17 Jun 2014

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Monomer: a molecule of relatively low molar mass that is linked with other similar molecules to form a polymer. Polymer: a molecule of large molar mass that consists of many repeating subunits (monomers) Polymerization: the process of linking monomer units into a polymer. Addition polymer: a polymer formed when monomer units are linked through addition reactions all atoms present in the monomer are retained in the polymer. Recall: alkenes undergo addition reactions with hydrogen halides, chlorine, bromine, or hydrogen add to. Alkenes can also react with other alkenes double bond in each broken, forming single bonds with each other. C=c + c=c + c=c -c-c-c-c-c-c- or [c-c]n- Polypropene: propane undergoes addition polymerization, producing polypropene (rope) very similar reaction with polyethene, only with the substitution of a methyl group of h. Polyvinyl chloride (pvc): an addition polymer of chloroethene. Polystyrene: benzene ring attached to ethane molecule vinyl benzene (styrene), addition of styrene is polystyrene.

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Related Questions

Please answer all the questions

11/3 11/4 4 (a) What is an a-amino acid? (b) How do amino acids react to form proteins? Vinyl chloride is industrially important because it is the monomer from which the polymer, poly(vinyl chlonide (PVC) is obtained. Explain what s meant by monomer and polymer and name the process by which a monomer is converted to a polymer Wite an equation to represent the conversion of vinyl chloride to PVC 5 Write a chemical equation for the formation of alanylserine from the constituent amino acids 10. Polypeptides and proteins are important biological examples of condensation polymers. Draw in 2-D, two repeating units of the polypeptide formed only from the amino acid, glycine: NH CH-CO,H 6 Wha t amino acids would be obtained by hydrolysis of the following tripeptide? H2NCHCNHCH CNHCHCOH 11. Nylon is a polyamide-type of polymer often derived from the reaction between two different monomers 1,6-diaminohexane, HN(CHzuNH, and hexane 1,6-dioic acid HOC(CH2)aCO2H. (CHj)2 ?? ????? ?? (a) Identify electrophilic and nucleophilic sites in each of the reactant molecules and then indicate which atoms are likely to react with each other Given that one water molecule is eliminated for each reaction between two monomer molecules give a part structure of the polymer comprising three monomer units Polymers 7. What is the difference between a monomer and a polymer? (b) 8. Clearly define: (a) addition polymers (b) condensation polymers 9 Chloroethene (rinyl chloride) CHa CHCI, is an important industrial organic chemical. In industry it is produced by two different reaction sequences. (a) One reaction sequence involves reaction between ethene (ethylene) and chlorine, followed by strong heating of the reaction product. Write equations to represent these two reactions and classify each reaction as either substitution, addition or elimination. (b) The other reaction uses ethyne (acetylene) as the organic starting material. Write an equation to represent the reaction by which ethyne can be converted to vinyl chloride

Show transcribed image text 11/3 11/4 4 (a) What is an a-amino acid? (b) How do amino acids react to form proteins? Vinyl chloride is industrially important because it is the monomer from which the polymer, poly(vinyl chlonide (PVC) is obtained. Explain what s meant by monomer and polymer and name the process by which a monomer is converted to a polymer Wite an equation to represent the conversion of vinyl chloride to PVC 5 Write a chemical equation for the formation of alanylserine from the constituent amino acids 10. Polypeptides and proteins are important biological examples of condensation polymers. Draw in 2-D, two repeating units of the polypeptide formed only from the amino acid, glycine: NH CH-CO,H 6 Wha t amino acids would be obtained by hydrolysis of the following tripeptide? H2NCHCNHCH CNHCHCOH 11. Nylon is a polyamide-type of polymer often derived from the reaction between two different monomers 1,6-diaminohexane, HN(CHzuNH, and hexane 1,6-dioic acid HOC(CH2)aCO2H. (CHj)2 ?? ????? ?? (a) Identify electrophilic and nucleophilic sites in each of the reactant molecules and then indicate which atoms are likely to react with each other Given that one water molecule is eliminated for each reaction between two monomer molecules give a part structure of the polymer comprising three monomer units Polymers 7. What is the difference between a monomer and a polymer? (b) 8. Clearly define: (a) addition polymers (b) condensation polymers 9 Chloroethene (rinyl chloride) CHa CHCI, is an important industrial organic chemical. In industry it is produced by two different reaction sequences. (a) One reaction sequence involves reaction between ethene (ethylene) and chlorine, followed by strong heating of the reaction product. Write equations to represent these two reactions and classify each reaction as either substitution, addition or elimination. (b) The other reaction uses ethyne (acetylene) as the organic starting material. Write an equation to represent the reaction by which ethyne can be converted to vinyl chloride