Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 17.14, Problem 14KCP
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Explain the important properties of alumina that make it attractive for biomedical use.
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Polyethylene Terephthalate or PET is a linear semicrystalline thermoplastic polymer widely used in food packaging.
Calculate the density of this polymer when the total crystallinity is 65.4%.
The density for the totally amorphous PET material is 1.33 g/cm³, and the density of the totally crystalline is 1.44 g/cm³.
1.38 g/cm³
1.40 g/cm³
1.42 g/cm³
1.80 g/cm³
None of the above
(a) Draw a qualitative engineering stress-strain curve for
A Ductile polymer
(i)
(ii) A Metal
(iii) A ceramic
(Iv)
(v)
A glass
A Natural rubber
Label carefully. Rationalize your sketch for each material
Illustrate the difference between crystalline and amorphous polymers structure and explain the effect of this difference on their properties and applications.
Show examples of polymers that are not crystalline or semi-crystalline.
Chapter 17 Solutions
Foundations of Materials Science and Engineering
Ch. 17.14 - Explain the difference between a biomaterial and...Ch. 17.14 - Explain why bone may be classified as a composite...Ch. 17.14 - Prob. 3KCPCh. 17.14 - Prob. 4KCPCh. 17.14 - Prob. 5KCPCh. 17.14 - What is stress shielding? How can it be avoided?Ch. 17.14 - Prob. 7KCPCh. 17.14 - What properties of biopolymers make them suitable...Ch. 17.14 - Prob. 9KCPCh. 17.14 - Prob. 10KCP
Ch. 17.14 - Prob. 11KCPCh. 17.14 - Prob. 12KCPCh. 17.14 - Prob. 13KCPCh. 17.14 - Prob. 14KCPCh. 17.14 - Prob. 15KCPCh. 17.14 - Prob. 16KCPCh. 17.14 - Prob. 17KCPCh. 17.14 - Prob. 18KCPCh. 17.14 - Prob. 19KCPCh. 17.14 - Prob. 20KCPCh. 17.14 - Prob. 21KCPCh. 17.14 - Prob. 22KCPCh. 17.14 - Prob. 23KCPCh. 17.14 - Prob. 24KCPCh. 17.14 - Prob. 25KCPCh. 17.14 - Prob. 26KCPCh. 17.14 - What is tissue engineering? What is the principle...Ch. 17.14 - Prob. 28KCPCh. 17.14 - Prob. 29KCPCh. 17.14 - Prob. 30AAPCh. 17.14 - Prob. 32AAPCh. 17.14 - Prob. 33AAPCh. 17.14 - Prob. 34AAPCh. 17.14 - Prob. 39SEPCh. 17.14 - Prob. 40SEPCh. 17.14 - Prob. 41SEPCh. 17.14 - Prob. 42SEPCh. 17.14 - Prob. 43SEPCh. 17.14 - Prob. 44SEPCh. 17.14 - A bone has fractured along an inclined plane as...Ch. 17.14 - Prob. 46SEPCh. 17.14 - Prob. 47SEPCh. 17.14 - Prob. 48SEPCh. 17.14 - Prob. 49SEPCh. 17.14 - What role does the water content play in the...Ch. 17.14 - Prob. 51SEPCh. 17.14 - Prob. 52SEPCh. 17.14 - When you wake up in the morning, you are taller...Ch. 17.14 - Prob. 54SEPCh. 17.14 - Prob. 55SEP
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- Which of these models would best give a description of viscoelastic behavior for polymers? Explain your answerarrow_forward(a) Why most prosthetic limbs do not flex at the ankle, but the ones designed for athletes do? (b) Why is there almost no single test for biocompatibility? (c) Why is titanium such a commonly used biomaterial? (d) Why are most biomaterials not reused or recycled?arrow_forwardBriefly explain why the properties of polycrystalline materials are most often isotropic.arrow_forward
- Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) are powerful tools for imaging the micro- and nano-structure of a material. (a) Which technique provides higher imaging resolution, SEM or TEM? (b) Why does this technique provide higher resolution? Describe your reasoning. (c) A polymer sample is mounted on a solid metal stub and coated with a conductive layer. Which electron microscopy technique is the sample prepared for? (d) Why do we need a conductive coating on the polymer sample? Explain in terms of both the material and the imaging technique. (e) What information could Energy Dispersive X-ray (EDX) spectroscopy tell us about the sample? (f) Atomic Force Microscopy (AFM) enables high resolution surface imaging and measuring surface properties of samples. Describe one way that this (stiffness mapping) procedure can be done?arrow_forwardNowadays, many cooking utensils are made of polymeric materials. However, people believe that heating plastic utensils would cause harm such as releasing toxic substances. Hence, people are looking for other alternatives to replace plastic. Choose ONE cooking utensil (spatula) and identify the suitable material that will satisfy its criteria. Justify your answer. Your discussion must include the interrelationship between structure-properties-processing of the selected cooking utensil.arrow_forwardCan you explain elastic hysteresis in polymers with the aid of a diagram?arrow_forward
- The mechanical properties of cobalt may be improved by incorporating fine particles of tungsten carbide (WC). Given that the modulus of elasticity of these materials is 200 GPa and 700 GP, respectively. Plot modulus of elasticity versus the volume percent of WC in Co from 0 to 100 vol%, using both upper- and lower-bound expressions.arrow_forwardWhat is Gorilla Glass from Corning? Why does it outperform regular window glass in terms of mechanical properties? Briefly explain utilizing basic mechanical principles. When necessary, provide diagrams to further explain your response.arrow_forwardThe crystalline density of polypropyleneis 0.946 g>cm3, and its amorphous densityis 0.855 g>cm3. What is the weight percentof the structure that is crystalline ina polypropylene that has a density of0.9 g>cm3?arrow_forward
- What are the key advantages and applications of ceramic materials in the field of mechanical engineering?arrow_forwardWhy do crystalline polymers tend to have higher density than amorphous ones?arrow_forwardExplain with a diagram, the manufacturing process of the High tensile strength nanowires.arrow_forward
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