Organic polymers can also be incinerated as a means of disposal. (a) What products are formedon combustion of polyethylene? (b) What products are formed on combustion of polyethyleneterephthalate? (c) Are these reactions exothermic or endothermic? (See Sections 6.4 and 30.3 forrelated reactions.) (d) Propose a reason why HDPE and PET must be separated from poly(vinylchloride) prior to incineration.

a.The incineration of polyethylene, both pyrolytic and oxidative degradation products of…

Answered: Organic polymers can also be…

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter29: Organic Polymer Chemistry

Section: Chapter Questions

Problem 29.32P

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A polymer closely related to PET is PBT, which is made from terephthalic acid and butane-1,4-diol.(a) Propose a structure for PBT and write the condensed formula for the structure.(b) What does PBT stand for? That is, what do you expect the trivial name of PBT to be?(c) Would you expect PBT to have a higher or lower melting point than PET? Justify your answer.(d) PBT, rather than PET, is used in molding because it crystallizes faster. Explain why PBT crystallizes more quickly than PET.
1. Answer the following questions: (a) Why is free radical polymerization more commonly used today than ionic polymerization? (b) Almost all substituted ethylene monomers of commercial importance have the structure of CH2 = CHR or CH2 = CRR’ (where R or R' represent identical or different substituent groups). Why? (c) What are some methods for the production of conductive polymers? Give a few examples.
a) True or false: Alkenes undergo addition reactions andaromatic hydrocarbons undergo substitution reactions.(b) Using condensed structural formulas, write the balancedequation for the reaction of 2-pentene with Br2and name the resulting compound. Is this an addition ora substitution reaction? (c) Write a balanced chemicalequation for the reaction of Cl2 with benzene to make paradichlorobenzenein the presence of FeCl3 as a catalyst. Isthis an addition or a substitution reaction?
(a) What is the empirical formula of starch? (b) What isthe monomer that forms the basis of the starch polymer?(c) What bond connects the monomer units in starch:amide, acid, ether, ester, or alcohol?
(a) Draw the structure of polystyrene, which is formed by polymerizing the monomer styrene, C6H5CH=CH2. (b) What monomer is used to form poly(vinyl acetate), a polymer used in paints and adhesives?
Plastics are used to make many everyday items, such as the body of the kettle. (a) Complete the sentences by drawing a ring around the correct words. catalysts The plastic is made from many small molecules called (b) After a few years the kettle no longer worked. Some parts of the kettle are made of plastic. • Some parts of the kettle are made of stainless steel. • The owner of the kettle disposed of it in a landfill site. Consider these statements. monomers polymers (1) Suggest three reasons why the kettle should not be disposed of in a landfill site. 1. _________________________________________________________________ ___________________________________________________________________ 2. _________________________________________________________________ ___________________________________________________________________ 3. _________________________________________________________________ ___________________________________________________________________ (3)
(a) Calculate the standard enthalpy change for the combustion of 1 mol of benzene, C6H61l2, to CO21g2 and H2O1l2.(b) Compare the quantity of heat produced by combustion of 1.00 g propane with that produced by 1.00 g benzene.
(5) One of Prof Cunningham's former students wrote his doctoral dissertation about a new technology to clean up soil contaminated by certain types of chemicals. One of the chemicals we tested in the lab was 1,2,4,5-tetrachlorobenzene (TECB). (a) Draw the chemical structure of 1,2,4,5-tetrachlorobenzene. (b) When we started working on the project, we thought maybe TeCB would be de- stroyed according to first-order kinetics, but we weren't sure. Below are two tables of actual data that the student collected in the laboratory. The two data sets were collected under different experimental conditions. For each of the two experiments, determine if the disappearance of TeCB is zero-order, first-order, second-order, or something else. Specify the value of the rate constant (ko, k1, or k2, as appropriate). Be sure to give the right units of k! Table 1: Concentration of TECB vs. time, experiment 1 time (min) Conc. (mg/L) 10 20 30 45 5.0 2.93 2.06 0.61 0.28 0.057 Table 2: Concentration of TECB…
a) What is the difference between high- and low-density classifications of polyethylene? b) Among the 6 polymer resins, identify which can be recycled. Explain why we can't recycle the other types.
(4) Describe the synthesis of plastic especially polyethylene, 1,1- dichloroethane, and polyvinyl chloride
1. What are biodegradable polymers and their classification ( include its functions and importance)?
Write equations for the following: (a) a substitution reac-tion between 2-bromopropane and KI; (b) an addition reactionbetween cyclohexene and Cl2; (c) an addition reaction between2-propanone and H2(Ni metal is a catalyst)

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