Polymers: Make up almost everything, even DNA, super important. RECYCLABLITIY: 1. PETE (most common) 2. HDPE(common synthetic) 3. PVC 4. LDPE(common synthetic) 5. PP 6. PS 7.
PMMA POLYETHYLENE: milk jugs, grocery bags
PETE: Polyethylene terephthalate. Coke bottles, water bottles,containers, clothes. Expensive melts at 480F super clear, replaces glass (i.e jars) PETE = Ethylene
Glycol + Terephthalic Acid
HD/LDPE: High/Low density PE <Ethylene repeated = polyethylene. HD=opaque, stiff, melts at 250F LD=clear, cheaper, softer, melts at 220F
PP: polypropylene. melts at 300F , more expensive, lowest density.> ^ straight lines under microscope ^ branches
PVC: Polyvinyl “Vinyl” Chloride <Chloride = toxic = no recycle (oft) super cheap and common, melts at 220-460F, add plasticizer=change property. Car seats, pipes, glue
Burn=toxic, only self extinguishing plastic.
PS: polystyrene (foam) no recycle cancer causing cups, packing peanuts, egg cartons. highly flammable, melts at 460F, can be clear, can be solid, thick
black smoke when burned, slowly sink in water
PMMA:Poly methyl methacrylate (COOCH) melts at 320 scratch resistant, car windows, smartphone screens, easy to shape, a glass alternative.
Condensation Addition DISPOSE: landfill, burn, bio degradation, recycle recycling is expensive sorting is not 100% accurate RECYCLING
PROCESS collection, sorting, processed, turned into stuff
FIBERS: (animal) wool, silk (plant) cotton, linen (synthetic) nylon, acrylic, polyester, rayon. Synthetic fibers have little imperfections. wool silk nylon no burn, animal fibers dissolve in bleach
Fiber Tenacity: wool(1.8-2), silk(4.5-4.8), cotton(3.5-4.5), linen(4.8-6), nylon(4-9), acrylic(2-4), polyester(2-8.5), rayon(3-4.6) measured in grams per denier (g/d)
Wool: burnt hair, brittle ash, tiny flame. Silk: burnt feather,black beads. Cotton: burnt paper, amber/yellow flame, slow burn, fluffy. Linen: burnt grass, yellow flame, sparks, burns all the way
Nylon: celery, orange flame, hard bead. Acrylic: stinky, burns quick, melts. Polyester: sweet/chemical, burn quick. Rayon: burnt wood, rapid burning flame, slow burning embers, no ash.
dna to mrna: A=U C=G G=C T=A. DNA: nucleotides adenine, cytosine, guanine, thymine. (Uracil replaces thymine)(Deoxyribonucleic acid)
Sandy(low nutrients, drains well, large particle size), Loamy(drains ok, high nutrients, small particle size), Clay(poor drainage, high nutrients, microscopic particle size)
BLOOD SPATTERS: Low(4mm+, <5 ft/sec, nosebleeds, small cuts), Medium(2-4mm, 5-100 ft/sec,
stabbing, beating), High (<2mm, 100+ ft/sec, gunshot, bombing
