Polymers and Plastics Classification

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.