MATERIALS SCIENCE AND ENGINEERING -PACK
10th Edition
ISBN: 9781119721857
Author: Callister
Publisher: WILEY
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Question
Chapter 22, Problem 1DP
To determine
To list:
The advantages and disadvantages of the various materials that are used for the container production with the consideration of following aspects:
- Cost of the containers;
- Recyclability of the containers;
- Energy consumed for the production of these containers.
Expert Solution & Answer
Answer to Problem 1DP
The commonly used materials for the production of containers are listed below;
- 1. Glass
- 2. Aluminum
- 3. Polyethylene terephthalate (PET or PETE)
The advantages and disadvantages of these materials are explained below:
Explanation of Solution
Glass:
Advantages:
- Glass is an inexpensive material and it is readily available.
- It is chemically non-reactive material.
- It is the transparent material that gives a good appearance.
- The recycling process of glass does not require much energy.
- Increased and rapid production of recycled glass result in more usage and thereby reducing the pollutant emission.
Disadvantages:
- Glass is a non-bio degradable material.
- Sorting of salvaged glass takes more time and is an expensive process that reduces its market value.
Aluminum:
Advantages:
- Aluminum is a non-corrosive material compared to ferrous materials.
- Aluminum is easily available material.
- It has the capacity to withstand higher temperatures.
- Low energy is required to recycle the aluminum containers.
Disadvantages:
- They are non-refillable.
- Aluminum is the non-bio degradable material.
- It promotes the chemical reaction between the packed material and container. Tin coatings are provided to stop the chemical reaction.
Polyethylene terephthalate (PET or PETE):
Advantages:
- They possess good optical clarity.
- It is the light-weighted material compared to the others.
- It is a shatter-proof material.
- The PET containers are easy to manufacture (blow molding).
- It is chemically non-reactive material.
Disadvantages:
- They are non-refillable.
- PETs are the non-biodegradable materials.
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MATERIALS SCIENCE AND ENGINEERING -PACK
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