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Questions and Answers
Which items are typically made from High-Density Polyethylene (HDPE)?
Which items are typically made from High-Density Polyethylene (HDPE)?
Why should Polyvinyl Chloride (PVC) not come into contact with food?
Why should Polyvinyl Chloride (PVC) not come into contact with food?
Which of the following plastics is characterized as strong and able to withstand higher temperatures?
Which of the following plastics is characterized as strong and able to withstand higher temperatures?
Which of the following items is made from Low-Density Polyethylene (LDPE)?
Which of the following items is made from Low-Density Polyethylene (LDPE)?
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What does Code 7 for plastic represent?
What does Code 7 for plastic represent?
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What are the building blocks of polymers called?
What are the building blocks of polymers called?
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Which of the following is not a characteristic of High-Density Polyethylene (HDPE)?
Which of the following is not a characteristic of High-Density Polyethylene (HDPE)?
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Which of the following are examples of natural polymers?
Which of the following are examples of natural polymers?
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What significant issue is associated with the use of many polymers?
What significant issue is associated with the use of many polymers?
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What is the SPI code used for?
What is the SPI code used for?
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Study Notes
Polymers
- Polymers are chain-like molecules of high molecular weight, constructed from simpler chemical units called monomers. Different monomers or combinations create diverse polymer types.
- Many polymers are common in daily life; examples include Teflon, nylon, Dacron, polyethylene, polyester, Orlon, epoxy, vinyl, polyurethane, silicones, lucite, boat resin, starch, cellulose (from glucose), rubber (from isoprene), and proteins (from amino acids).
- Polymers are crucial to modern society but pose waste management challenges due to their non-biodegradability. Recycling is important for reducing waste and extracting valuable raw materials.
Different Types of Plastics and Their Classifications
- The Society of the Plastics Industry (SPI) developed a classification system (using numbers) in 1988 to identify different plastic types.
- Manufacturers typically stamp the SPI code onto the bottom of plastic products to aid identification.
- This guide provides a basic overview of various plastic types and their associated SPI codes.
Polyethylene Terephthalate (PETE)
- PETE can absorb odors and flavors from stored food and drinks.
- It is commonly recycled.
- PETE is used in beverage bottles, medicine jars, rope, clothing, and carpet fibers.
High-Density Polyethylene (HDPE)
- HDPE is considered safe; it doesn't readily transfer chemicals into food or drink.
- Commonly recycled.
- HDPE is found in milk containers, motor oil containers, shampoo and conditioner bottles, soap bottles, detergents, and bleach.
- Never reuse HDPE bottles containing food/drinks unless they were originally intended for that purpose.
Polyvinyl Chloride (PVC)
- PVC can be recycled, although it's often used for items like pipes and tiles.
- PVC should not come in contact with food as it can be harmful if ingested.
Other Polymer Types (Further Information)
- Various polymer types are classified based on their specific properties and applications, each having its own distinct characteristics.
General Properties and Common Household Uses
- The table details properties like moisture barrier, heat resistance, strength for each type (e.g., PET, HDPE, etc.) and their typical applications in everyday items.
Other Properties (Detailed Chemical Properties)
- Various properties of different plastics are described, including their reaction (combustion/burning) in terms of flame color, smoke, solubility in water and acetone, etc. Each polymer type has distinctive characteristics.
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Description
Explore the fascinating world of polymers and their various classifications. Learn about the different types of plastics, their uses, and the importance of recycling in waste management. This quiz will test your knowledge on both the structure of polymers and the SPI system for identifying plastics.
