Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 7, Problem 28QLP
Discuss the significance of the glass-transition temperature, Tg, in engineering applications.
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Chapter 7 Solutions
Manufacturing Engineering & Technology
Ch. 7 - Summarize the important mechanical and physical...Ch. 7 - What are the major differences between the (a)...Ch. 7 - List properties that are influenced by the degree...Ch. 7 - What is the difference between condensation...Ch. 7 - Explain the differences between linear, branched,...Ch. 7 - What is the glass-transition temperature?Ch. 7 - List and explain the additives commonly used in...Ch. 7 - What is crazing?Ch. 7 - What are polyblends?Ch. 7 - List the major differences between thermoplastics...
Ch. 7 - What is an elastomer?Ch. 7 - What effects does a plasticizing agent have on a...Ch. 7 - Define the following abbreviations: PMMA, PVC,...Ch. 7 - Explain why it would be advantageous to produce a...Ch. 7 - What are the differences and similarities of...Ch. 7 - Are molecular weight and degree of polymerization...Ch. 7 - Why do polymers need to be dried before...Ch. 7 - What characteristics of polymers make them...Ch. 7 - Do polymers strain harden more than metals or vice...Ch. 7 - Inspect various plastic components in an...Ch. 7 - Give applications for which flammability of...Ch. 7 - What characteristics make polymers advantageous...Ch. 7 - What properties do elastomers have that...Ch. 7 - Do you think that the substitution of plastics for...Ch. 7 - Is it possible for a material to have a hysteresis...Ch. 7 - Observe the behavior of the specimen shown in Fig....Ch. 7 - Add more to the applications column in Table 7.3.Ch. 7 - Discuss the significance of the glass-transition...Ch. 7 - Prob. 29QLPCh. 7 - Explain how cross-linking improves the strength of...Ch. 7 - Describe the methods by which the optical...Ch. 7 - How can polymers be made to conduct electricity?...Ch. 7 - Explain the reasons for which elastomers were...Ch. 7 - Give several examples of plastic products or...Ch. 7 - Describe your opinions regarding the recycling of...Ch. 7 - Explain how you would go about determining the...Ch. 7 - Compare the values of the elastic modulus, given...Ch. 7 - Why is there so much variation in the stiffness of...Ch. 7 - Explain why thermoplastics are easier to recycle...Ch. 7 - Give an example where crazing is desirable.Ch. 7 - Describe the principle behind shrink wrapping.Ch. 7 - List and explain some environmental pros and cons...Ch. 7 - List the characteristics required of a polymer for...Ch. 7 - How can you tell whether a part is made of a...Ch. 7 - As you know, there are plastic paper clips...Ch. 7 - By incorporating small amounts of a blowing agent,...Ch. 7 - In injection-molding operations (Section 19.3), it...Ch. 7 - From an environmental standpoint, do you feel it...Ch. 7 - Calculate the areas under the stressstrain curve...Ch. 7 - Prob. 50QTPCh. 7 - Prob. 51QTPCh. 7 - Estimate the number of molecules in a typical...Ch. 7 - Using strength and density data, determine the...Ch. 7 - Prob. 54QTPCh. 7 - Prob. 55SDPCh. 7 - Describe the design considerations involved in...Ch. 7 - Assume that you are manufacturing a product in...Ch. 7 - Assume you work for a company that produces...Ch. 7 - Prob. 59SDPCh. 7 - Make a list of products or parts that currently...Ch. 7 - Prob. 61SDPCh. 7 - Prob. 62SDPCh. 7 - Prob. 63SDPCh. 7 - Prob. 64SDPCh. 7 - With Table 7.3 as a guide, inspect various...
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- (b) Using the material selection chart provided (Figure 1) and appropriate design guideline. (ii) Explain the reasons for the final choice of one material considering high strength as a requirement. Even though ceramic materials possess high strength, explain why (ii) ceramics would not be suitable in this case.arrow_forwardYou are working as a quality control engineer in a glass manufacturing company. What characterization technique would you use for routine and quick analysis to decide whether any impurities from the glass melting furnaces are introduced to your glass products? Explain your reasoningarrow_forwardThe modulus of elasticity for a ceramic material having 4.1 vol% porosity is 323 GPa. (a) Calculate the modulus of elasticity (in GPa) for the nonporous material. E = i E = (b) Calculate the modulus of elasticity (in GPa) for 11.7 vol% porosity. GPa i GPaarrow_forward
- Q2 (a) How are glass products formed or shaped ? (b) What are some major limitations to the extensive use of composite materials in engineering applications ?arrow_forwardExplain , why you would/would not use XRD for the characterization of glassarrow_forwardWhat class of toughening mechanisms is usually at work in engineered ceramics, and why is this the case?arrow_forward
- P3 Examine the properties and applications of ceramic products manufactured using the sintering, hot pressing, chemical vapour deposition (CVD) and, reaction bonding processes.arrow_forwardDefine and discuss Blow molding Process in Metal and Plastic. Can blow molding be used in Glass materials yes or no? why?arrow_forwardState four (4) factors that can influence the variability in fracture strength of ceramic components.arrow_forward
- Only 4arrow_forwardGlass ceramics have low coefficients of thermal expansion. State why this is the case (hint; consider the microstructure) and then by means of a suitable diagram, describe and explain the thermal treatment employed in the production of glass ceramics.arrow_forwardAnswer part darrow_forward
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