Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 10.14, Problem 104AAP
(a)
To determine
Write the general reaction for the polymerization of polystyrene from styrene.
(b)
To determine
What effect does the presence of the phenyl group on every other carbon of the main chain have on the impact properties of polystyrene.
(c)
To determine
How can the low-impact resistance of polystyrene be improved by copolymerization.
(d)
To determine
What are some of the applications for polystyrene.
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( B ) A stress of 6.7 MPa is employed to one type of a polymer under constant strain . After 40 days at 20 ° C the stress is reduced to only 8.4 MPa . When the same polymer is heated to 40 ° C the relaxation time is 40 days . 1- Calculate the relaxation time constant for this material at 25 ° C ? 2- Estimate the stress after 50 days at 25 ° C ? 3- Estimate the stress relaxation activation energy for the same polymer .
Based on the facts that the free-radical polymerization of ethene is spontaneous and that polymer molecules are less disorganized than the starting monomers, decide whether the polymerization reaction is exothermic or endothermic. Explain.
Molecular weight data for some polymer are tabulated here. Compute (a) the number-average
molecular weight, (b) the weight-average molecular weight. (c) If it is known that this material's degree of
polymerization is 710, which one of the polymers listed in Table 14.3 is this polymer? Why?
Molecular Weight
Range g/mol
15,000-30,000
Xi
Wi
0.04
0.01
30,000-45,000
0.07
0.04
45,000-60,000
0.16
0.11
60,000-75,000
0.26
0.24
75,000-90,000
0.24
0.27
90,000 105,000
0.12
0.16
105,000-120,000
0.08
0.12
120,000-135,000
0.03
0.05
Chapter 10 Solutions
Foundations of Materials Science and Engineering
Ch. 10.14 - Define and differentiate polymers, plastics, and...Ch. 10.14 - (a) Describe the atomic structural arrangement of...Ch. 10.14 - What is a pendant atom or group of atoms?Ch. 10.14 - (a)What type of bonding exists within the...Ch. 10.14 - Prob. 5KCPCh. 10.14 - Prob. 6KCPCh. 10.14 - Prob. 7KCPCh. 10.14 - (a) What is the repeating chemical unit of a...Ch. 10.14 - What are the three major reactions that occur...Ch. 10.14 - Prob. 10KCP
Ch. 10.14 - (a) Why must one consider the average degree of...Ch. 10.14 - Prob. 12KCPCh. 10.14 - Write structural formulas for the mers of the...Ch. 10.14 - Prob. 14KCPCh. 10.14 - Prob. 15KCPCh. 10.14 - Prob. 16KCPCh. 10.14 - Define stepwise polymerization of linear polymers....Ch. 10.14 - What are three basic raw materials used to produce...Ch. 10.14 - Describe and illustrate the following...Ch. 10.14 - Prob. 20KCPCh. 10.14 - Prob. 21KCPCh. 10.14 - Prob. 22KCPCh. 10.14 - Prob. 23KCPCh. 10.14 - Prob. 24KCPCh. 10.14 - Prob. 25KCPCh. 10.14 - Prob. 26KCPCh. 10.14 - Prob. 27KCPCh. 10.14 - Prob. 28KCPCh. 10.14 - Prob. 29KCPCh. 10.14 - (a) Describe the compression-molding process for...Ch. 10.14 - (a) Describe the transfer-molding process for...Ch. 10.14 - Prob. 32KCPCh. 10.14 - Define an engineering thermoplastic. Why is this...Ch. 10.14 - What is the structural formula for the amide...Ch. 10.14 - (a) In the designation nylon 6,6, what does the...Ch. 10.14 - Prob. 36KCPCh. 10.14 - Prob. 37KCPCh. 10.14 - Prob. 38KCPCh. 10.14 - Prob. 39KCPCh. 10.14 - Prob. 40KCPCh. 10.14 - Prob. 41KCPCh. 10.14 - Prob. 42KCPCh. 10.14 - Prob. 43KCPCh. 10.14 - Prob. 44KCPCh. 10.14 - (a) What are the major processing methods used for...Ch. 10.14 - Prob. 46KCPCh. 10.14 - Prob. 47KCPCh. 10.14 - Prob. 48KCPCh. 10.14 - What is natural rubber mainly made of? What other...Ch. 10.14 - Prob. 50KCPCh. 10.14 - Prob. 51KCPCh. 10.14 - Prob. 52KCPCh. 10.14 - Prob. 53KCPCh. 10.14 - What is the vulcanization process for natural...Ch. 10.14 - Prob. 55KCPCh. 10.14 - Prob. 56KCPCh. 10.14 - What are the silicones? What is the general...Ch. 10.14 - Prob. 58KCPCh. 10.14 - Prob. 59KCPCh. 10.14 - Prob. 60KCPCh. 10.14 - Prob. 61KCPCh. 10.14 - Define the creep modulus of a plastic material.Ch. 10.14 - What is a craze in a glassy thermoplastic?Ch. 10.14 - Describe the structure of a craze in a...Ch. 10.14 - Prob. 65KCPCh. 10.14 - Prob. 66AAPCh. 10.14 - Prob. 67AAPCh. 10.14 - Prob. 68AAPCh. 10.14 - An injection-molding polycarbonate material has an...Ch. 10.14 - Prob. 70AAPCh. 10.14 - Prob. 71AAPCh. 10.14 - Prob. 72AAPCh. 10.14 - Prob. 73AAPCh. 10.14 - How much sulfur must be added to 70 g of butadiene...Ch. 10.14 - If 5 g of sulfur is added to 90 g of butadiene...Ch. 10.14 - Prob. 76AAPCh. 10.14 - Prob. 77AAPCh. 10.14 - Prob. 78AAPCh. 10.14 - Prob. 79AAPCh. 10.14 - Prob. 80AAPCh. 10.14 - Prob. 81AAPCh. 10.14 - Prob. 82AAPCh. 10.14 - Prob. 83AAPCh. 10.14 - A polymeric material has a relaxation time of 60...Ch. 10.14 - Prob. 85AAPCh. 10.14 - Prob. 86AAPCh. 10.14 - Prob. 87AAPCh. 10.14 - Prob. 88AAPCh. 10.14 - Prob. 89AAPCh. 10.14 - Prob. 90AAPCh. 10.14 - Prob. 91AAPCh. 10.14 - Prob. 92AAPCh. 10.14 - Prob. 93AAPCh. 10.14 - (a) What causes a polyethylene molecular chain to...Ch. 10.14 - Prob. 95AAPCh. 10.14 - Prob. 96AAPCh. 10.14 - Prob. 97AAPCh. 10.14 - Prob. 98AAPCh. 10.14 - Write the reaction for the stepwise polymerization...Ch. 10.14 - Prob. 100AAPCh. 10.14 - Prob. 101AAPCh. 10.14 - How does chain branching affect the following...Ch. 10.14 - (a) Write the general reaction for the...Ch. 10.14 - Prob. 104AAPCh. 10.14 - Prob. 105AAPCh. 10.14 - Prob. 106AAPCh. 10.14 - Prob. 107AAPCh. 10.14 - Prob. 108AAPCh. 10.14 - Prob. 109AAPCh. 10.14 - Prob. 110AAPCh. 10.14 - Prob. 111AAPCh. 10.14 - Prob. 112AAPCh. 10.14 - Prob. 113AAPCh. 10.14 - Prob. 114AAPCh. 10.14 - Prob. 115AAPCh. 10.14 - Prob. 116AAPCh. 10.14 - Prob. 117AAPCh. 10.14 - Prob. 118AAPCh. 10.14 - Prob. 119AAPCh. 10.14 - Prob. 120AAPCh. 10.14 - What are two types of reaction sites that are...Ch. 10.14 - Prob. 122AAPCh. 10.14 - Prob. 123AAPCh. 10.14 - Prob. 124AAPCh. 10.14 - Prob. 125AAPCh. 10.14 - Prob. 126AAPCh. 10.14 - How does cross-linking with sulfur affect the...Ch. 10.14 - Prob. 128AAPCh. 10.14 - Can SBR be vulcanized? Explain.Ch. 10.14 - Prob. 130AAPCh. 10.14 - Write the repeating chemical structural unit for...Ch. 10.14 - Prob. 132AAPCh. 10.14 - Prob. 133AAPCh. 10.14 - Prob. 134AAPCh. 10.14 - Prob. 135AAPCh. 10.14 - Prob. 136AAPCh. 10.14 - Prob. 137AAPCh. 10.14 - Explain how highly polar atoms bonded to the main...Ch. 10.14 - Prob. 139AAPCh. 10.14 - Prob. 140AAPCh. 10.14 - Prob. 141AAPCh. 10.14 - Prob. 142AAPCh. 10.14 - Prob. 143AAPCh. 10.14 - Prob. 144AAPCh. 10.14 - Why do cured thermoset plastics not become viscous...Ch. 10.14 - Prob. 146AAPCh. 10.14 - Prob. 147AAPCh. 10.14 - Prob. 148AAPCh. 10.14 - Prob. 149AAPCh. 10.14 - Prob. 150AAPCh. 10.14 - Prob. 151AAPCh. 10.14 - Prob. 152AAPCh. 10.14 - Prob. 153AAPCh. 10.14 - Prob. 154AAPCh. 10.14 - Prob. 155AAPCh. 10.14 - Prob. 156AAPCh. 10.14 - Prob. 157AAPCh. 10.14 - Prob. 158AAPCh. 10.14 - Prob. 159AAPCh. 10.14 - Prob. 160AAPCh. 10.14 - Prob. 161AAPCh. 10.14 - Prob. 162AAPCh. 10.14 - Prob. 163AAPCh. 10.14 - Prob. 164AAPCh. 10.14 - Prob. 165AAPCh. 10.14 - Prob. 166AAPCh. 10.14 - Prob. 167AAPCh. 10.14 - Prob. 168AAPCh. 10.14 - Prob. 169AAPCh. 10.14 - Prob. 170AAPCh. 10.14 - Prob. 171AAPCh. 10.14 - Prob. 172AAPCh. 10.14 - Prob. 173AAPCh. 10.14 - Prob. 174AAPCh. 10.14 - Prob. 175AAPCh. 10.14 - Prob. 176AAPCh. 10.14 - Prob. 178AAPCh. 10.14 - Prob. 179AAPCh. 10.14 - What are some of the advantages of epoxy thermoset...Ch. 10.14 - How are most unsaturated polyesters reinforced?Ch. 10.14 - What are some applications for reinforced...Ch. 10.14 - Prob. 183AAPCh. 10.14 - Prob. 187SEPCh. 10.14 - Prob. 188SEPCh. 10.14 - Prob. 189SEPCh. 10.14 - Prob. 190SEPCh. 10.14 - Prob. 191SEPCh. 10.14 - Prob. 192SEPCh. 10.14 - Prob. 193SEPCh. 10.14 - (a) In selecting the materials for an infant milk...Ch. 10.14 - Prob. 195SEPCh. 10.14 - Prob. 196SEPCh. 10.14 - (a) In selecting the materials for compact discs,...Ch. 10.14 - Prob. 198SEPCh. 10.14 - Prob. 199SEPCh. 10.14 - Prob. 200SEPCh. 10.14 - (a) In selecting the materials for a bungee cord,...Ch. 10.14 - Prob. 202SEPCh. 10.14 - Prob. 203SEPCh. 10.14 - In orthopedic applications related to knee and hip...
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