Difference between revisions of "Polymer"
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| + | Chain molecules if not <br> | ||
| + | – fully stretched or by force applied at the ends or <br> | ||
| + | – constrained in a channel <br> | ||
| + | are not in [[machine phase]]. | ||
| + | |||
| + | [[Mechanosynthesis]] of chain molecules may be more challenging than <br> | ||
| + | [[Mechanosynthesis]] of chain [[crystolecules]]. <br> | ||
| + | That is due to chain molecules being floppy and harder to constraint in position. <br> | ||
| + | If chain molecules are to be released after [[mechanosynthesis]] into a liquid phase space outside [[machine phase]], <br> | ||
| + | then they need to be funneled out through some kind of valve like acting pores. <br> | ||
| + | Related: [[Synthesis of food]] | ||
| + | |||
| + | == CONs / disadvantages == | ||
| + | |||
| + | Cain molecules can't make up stiff nanostructures. <br> | ||
| + | The base of [[gemstome metamaterial technology]]. <br> | ||
| + | See: [[Stiffness]], [[Gem-gum]] | ||
| + | |||
| + | '''Radiation:'''<br> | ||
| + | Chain molecules have the disadvantage of being susceptible <br> | ||
| + | to even slightly hard radiation (UVA, UVB). | ||
| + | |||
| + | Chain molecules tend to be limited in thermal resillience. <br> | ||
| + | Thus leaving them in a system or deliberate inclusion of them into a system can and will <br> | ||
| + | constrain the systems maximal performance characteristics. <br> | ||
| + | See: [[Consistent design for external limiting factors]] | ||
| + | |||
| + | == PROs / advantages == | ||
| + | |||
| + | Due to providing | ||
| + | * a lot of degrees of freedom (DOFs) in a compact volume and | ||
| + | * retained control over these DOFs as in chain molecule stretchability (unlike in liquids) | ||
| + | Chain molecules might be advantageous for high density safe entropic energy storages. <br> | ||
| + | That is energy storage that freze rather than explode when damaged. <br> | ||
| + | See: [[entropomechanical conversion]] | ||
== List of known existing polymers == | == List of known existing polymers == | ||
Revision as of 12:52, 1 September 2022
Chain molecules if not
– fully stretched or by force applied at the ends or
– constrained in a channel
are not in machine phase.
Mechanosynthesis of chain molecules may be more challenging than
Mechanosynthesis of chain crystolecules.
That is due to chain molecules being floppy and harder to constraint in position.
If chain molecules are to be released after mechanosynthesis into a liquid phase space outside machine phase,
then they need to be funneled out through some kind of valve like acting pores.
Related: Synthesis of food
Contents
- 1 CONs / disadvantages
- 2 PROs / advantages
- 3 List of known existing polymers
- 3.1 Bioplastics (not necessarily well biodegradable)
- 3.2 Elastic plastics
- 3.3 Ultra low melting plastics
- 3.4 Water dissolvable plastics
- 3.5 Acetone dissolvable plastic that stink when heated
- 3.6 Highly transparent plastics
- 3.7 Self lubricating / tough plastics
- 3.8 High performance polymers (typically include carbon rings)
- 3.9 Misc
- 4 Related
CONs / disadvantages
Cain molecules can't make up stiff nanostructures.
The base of gemstome metamaterial technology.
See: Stiffness, Gem-gum
Radiation:
Chain molecules have the disadvantage of being susceptible
to even slightly hard radiation (UVA, UVB).
Chain molecules tend to be limited in thermal resillience.
Thus leaving them in a system or deliberate inclusion of them into a system can and will
constrain the systems maximal performance characteristics.
See: Consistent design for external limiting factors
PROs / advantages
Due to providing
- a lot of degrees of freedom (DOFs) in a compact volume and
- retained control over these DOFs as in chain molecule stretchability (unlike in liquids)
Chain molecules might be advantageous for high density safe entropic energy storages.
That is energy storage that freze rather than explode when damaged.
See: entropomechanical conversion
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
- PEI' … polyethylenimine [2]
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) … [3] – ropes
- POM (delrin) … polyoxymethylene – plastic gears, lubricating spacess
- PA (nylon) … polyamides same backbone as natural proteins – lawnmower strings
- PC … polycarbonates [4]
- PTFE (teflon) … [5] – 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 – [6] e.g. used as 3D printer printbed coating
- used as 3D priner heatbed coating
- Aramid (kevlar) – [7]
- Polyimide (kapton) – seen on spacecraft, UHV systems, 3D printer heatbeds [8]
Misc
- PVC … polyvinylchloride – troublesome when burnt thus faded out except for e.g. orange ground pipes
Polycarbonates with small linkers:
- PPC … polypropylene carbonate [9]
- PEC … polyethylene carbonate – rare but available commercially empowermaterials
- polymethylene carbonate??
Compositon wise this is almost polymerized carbon dioxide.
Could this be used as CO2 sink?
