Plastics Flashcards
20th century, beginning of the plastic era with semi-synthetics
Synthetic plastic era
year of the invention of bakelite by leo bakeland
year 1907
21st century, new era of environment friendly plastic
Bioplastic era
derived from corn starch. can be used to make plastic bags, fibers for clothing, and 3D printing
PLA (polyactic acid)
are composed of linear polymer chains without crosslinks between them
Thermoplastics
Toys, appliances, telephones, cellphones, microwaves, musical instruments
ABS
construction materials, data storage devices, electronic components, and automotive and aviation parts.
Polycarbonate
packaging, such as plastic bags, films, geomembranes, bottles, and more.
Polyethylene
motorcycle helmet visors, plane windows, aquariums, ports in submersibles, eye-glass lenses and exterior lights
acrylic
fabrics, rope, musical instruments, parachutes, flak vests, women’s stockings.
Nylon
Commonly used in 3D printing with fused deposition modeling techniques
PLA (Polyactic acid)
vinyl sliding on homes and other construction applications such as drain pipes, gutters, and roofing sheets.
Polyvinyl Chloride
composites that crosslink and/or the presence of damaged fibers during the recycling process
Thermosets
Construction, electrical, packaging, transport, and furniture
5 usage of plastic
where the heat-melted plastic raw materials is injected into a mold to take the shape of the mold and then cooled and removed from the mold.
Plastic injection
where with the help of heat and pressure, it is ensured that the material passes continuously from the mold and long parts are produced.
Plastic extrusion
what makes plastic turn yellow and becomes brittle over time.
Cellulose nitrate
plastics are delivered to a material recovery facility (mrf) or handler for sorting into single resin streams to increase product value.
Mechanical recycling
special case where condensation polymers such as PET or nylon are chemically reacted to form starting materials.
Chemical recycling
Uses plastic water bottles, plastic combs, and plastic containers and repurposes to make fabric. Polyethylene terephthalate; recyclable.
SPI Code 1 (PETE)
Uses larger plastic containers, plastic bags, and toys and repurposes to make vinyl tiles, fences. High Density Polyethylene. Recyclable.
SPI Code 2 (HDPE)
Uses shoes, plastic tote bags, plumbing materials, gutters and repurposed to make tiles, sheets, and roofing. Polyvinyl Chloride. Recyclable.
SPI Code 3 (V)
uses clear wrappers, food packaging, plastic lids, zip bags and repurposed t make building blocks and big plastic trash bins. Low-density Polyethylene.
SPI Code 4 (LDPE)
Uses plastic utensils, diapers, and water bottle lids and repurpose to make grinded sheets of plastic fibers, fabric, and storage. Polypropylene. Not recyclable.
PI Code 5 (PP)
uses styrofoam container and plastic utensils to turn into binders and styrofoam flooring. not recyclable.
SPI Code 6 (Styrofoam)
usually for piping, doors, windows. can resist fire, oils ,or chemicals and can withstand extreme environmental conditions. preferred flooring for its ability t prevent dirt and buildup as well as the breading of microbes.
PVC
durable and strong enough to support large weight loads. preferable for damp locations, locations that have to support heavy loads like a garage, or for sport subfloorings like basketball court.
PP
provides a firm and strong closed-cell material, provides bounce, cushion, and shock absorption.
Polyethylene
used when constructing green or low energy buildings
Polyurethane spray
