Difference between revisions of "Polymer"

Revision as of 11:27, 1 September 2022

List of known existing polymers

Bioplastics (not necessarily well biodegradable)

• PLA … polylactic acid – made from biomatter
• PHA … polyhudroxyalkanoates – [1]
• CA … cellulose acetate

Elastic plastics

• TPU … thermoplastic polyurethane

Ultra low melting plastics

• PCL … low melting plastic used in medicine and early 3D printer prototypes

Water dissolvable plastics

• PVA … water soluble plastic related to non-toxic wood glue - petrol made but biodegradable

Acetone dissolvable plastic that stink when heated

• HIPS … cheap and brittle
• ABS … LEGO
• ASA … more UV resillient

Highly transparent plastics

• PMMA (aka plexiglass)
• PETG … (common bottleplastic)

Self lubricating / tough plastics

Cheap:

• HDPE … high density polyerhylene – detergent bottles
• LDPE … low density polyethylene – plastic bags

Less cheap:

• UHMWPE (dyneema) … [2] – ropes
• POM (delrin) … polyoxymethylene – plastic gears, lubricating spacess
• PA (nylon) … polyamides same backbone as natural proteins – lawnmower strings
• PC … polycarbonates [3]
• PTFE (teflon) … [4] – pan coatings, tubes

High performance polymers (typically include carbon rings)

• PEEK … e.g. used as heat-break in 3D printer hot ends
• PEKK
• PEI … polyetherimide – [5] e.g. used as 3D printer printbed coating
• used as 3D priner heatbed coating
• Aramid (kevlar) – https://en.wikipedia.org/wiki/Aramid
• Polyimide (kapton) – seen on spacecraft, UHV systems, 3D printer heatbeds
  https://en.wikipedia.org/wiki/Kapton

Misc

• PVC … polyvinylchloride – troublesome when burnt thus faded out except for e.g. orange ground pipes

Polymers: Polycarbonates with small linkers like:

• polypropylene carbonate PPC [6]
• polyethylene carbonate PEC – rare but available commercially empowermaterials
• polymethylene carbonate??

Compositon wise this is almost polymerized carbon dioxide.
Could this be used as CO₂ sink?

Related

• Foldamers
• de-novo protein engineering