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polymer
A polymer (; Greek poly-, "many" + -mer, "part") is a large molecule, or macromolecule, composed of many repeated subunits. Due to their broad range of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compounds, produces unique physical properties including toughness, viscoelasticity, and a tendency to form glasses and semicrystalline structures rather than crystals. The terms polymer and resin are often synonymous with plastic.
The term "polymer" derives from the Greek word πολύς (polus, meaning "many, much") and μέρος (meros, meaning "part"), and refers to a molecule whose structure is composed of multiple repeating units, from which originates a characteristic of high relative molecular mass and attendant properties. The units composing polymers derive, actually or conceptually, from molecules of low relative molecular mass. The term was coined in 1833 by Jöns Jacob Berzelius, though with a definition distinct from the modern IUPAC definition. The modern concept of polymers as covalently bonded macromolecular structures was proposed in 1920 by Hermann Staudinger, who spent the next decade finding experimental evidence for this hypothesis.Polymers are studied in the fields of biophysics and macromolecular science, and polymer science (which includes polymer chemistry and polymer physics). Historically, products arising from the linkage of repeating units by covalent chemical bonds have been the primary focus of polymer science; emerging important areas of the science now focus on non-covalent links. Polyisoprene of latex rubber is an example of a natural/biological polymer, and the polystyrene of styrofoam is an example of a synthetic polymer. In biological contexts, essentially all biological macromolecules—i.e., proteins (polyamides), nucleic acids (polynucleotides), and polysaccharides—are purely polymeric, or are composed in large part of polymeric components—e.g., isoprenylated/lipid-modified glycoproteins, where small lipidic molecules and oligosaccharide modifications occur on the polyamide backbone of the protein.The simplest theoretical models for polymers are ideal chains.
Got cash in hand, not looking to be cheap about it, I know a polymer SVD furniture set isn’t cheap. To be clear this is for a traditional SVD Dragunov. Not interested in anything for the Romanian PSL/FPK
253-441-9744
For sale
diamondback polymer flip up sights for AR variant- $80
Streamlight TLR4 light/lazer kit for multiple railed handguns- $100
Very Respectfully
Nick
Just like the title says
Plus a second set of the bits as well
Instruction manual and everything that comes with it from factory. Minus the sticker. I stole that hehe
100 bucks. Will trade for a good bolt carrier group and charging handle
Bought this online from a gun store in AL.(see pics), after it arrived I saw the " version with the 4" barrel and bought that so this has to go. I bought it without a case and only one 14rnd. mag. I am including a case and 2 mags for a total of 3. I have not fired this pistol. What you see in...
Taurus TH9, Full-Sized (17 +1), DA/SA, 9mm Pistol - with Light
Dependable home defense pistol at budget price.
$240
Buyer pays fees.
Pistol is in excellent condition.
(For those of you who like more detail, see the rest of the description below the pictures.)
INCLUDED
Pistol, 9mm...
>>>>>>>>>>> SALE-PENDING <<<<<<<<<<<<
Selling six BRAND NEW Bulgarian 30 round AK-47 magazines at a great price so here's an opportunity to put a few more away in "the stash".
These retail for $12.99 - $14.99 plus shipping on the "open market".
* My bundled price works out to $8.33 dollars...
New in the box Polymer 80 / 80% standard GLOCK lower (G17 Gen3). Complete kit with jig and bits. The lower is “Grey” in color.
Part number # PF940V2
I have it with me. I’ll be in and out on some field jobs. I would trade for the same in a black large frame, for a .45/10mm.
*** SOLD *** $75.00...
$100 - Brand new - Polymer80 serialized full size - just add parts - must go through FFL
I bought this planning a build and I think I am going to go a different direction
it is this one here in black
https://www.primaryarms.com/polymer-80-pfs9-serialized-glock-17-full-size-frame-black
$335...
Adjustable black polymer stock for Springfield M1A or M14. Has a few good scuffs and missing optional "saddle" piece that covers pistol grip. Otherwise in great usable condition. Asking $85 OBO.