EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 20QLP
Inspect various plastic components in an automobile, and state whether they are made of thermoplastic materials or of thermosetting plastics.
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Differentiate thermoplastics and thermosetting plastics with example materials .
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Thermal plastics are stronger than thermoset plastics.
Chapter 7 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
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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- Q21) please quicly needarrow_forwardWhat are the different types of Plastic Materials? Discuss each briefly (at least 4 types).arrow_forwardDescribe the difference in mechanical properties as a function of temperature between a highly crystalline thermoplastic and an amorphous thermoplastic.arrow_forward
- with the use of appropriate diagrams/ structures and examples compare and contrast thermosetting plastics and thermoplastics.arrow_forwardBased on the graph below, reinforcing plastic with glass fibers results in: A. An increase in plasticity B. An increase in inelastic deformation C, An increase in stiffness D. A decrease in stiffnessarrow_forwardDiscuss the effect of temperature and strain rate on the mechanical properties of polymers.arrow_forward
- Draw stress-strain graphs for two polymers: one is stiffer than the other and exhibits ayield point and the other shows no clear yield point but is much tougher.arrow_forwardIdentify a minimum of two structural characteristics and two mechanical characteristics that set elastomers apart from other classes of materials (including other polymers).arrow_forwardThe use and applications of plastics in our everyday life cannot be denied. Identify and discuss three specific properties of plastics that has led to their applications in the following fields: (i) Construction (ii) Transportarrow_forward
- Plastics may exhibit a change in properties as they age, particularly when subjected to elevated temperatures. Material properties such as tensile strength will increase with an increasing temperature as a function of increasing time. True or false.arrow_forwardDefine the term Elastoplastic?arrow_forwardState the critical difference in the processing behavior of thermoplastics vs. thermosets.arrow_forward
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