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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.
Brandnew lower and brand new jig in box,, wolf grey. JMT Newest version "Equalizer" .308 80% lower receiver. JMT is constantly evolving with products to deliver the ultimate lowers in the industry. JMT engineered the best polymer/composite .308 on the market today unparallel by any othet.
Key...
As stated in the title, I am selling my AK74M. As I'm sure you already know if you're looking for this, AK74s are not easy to find, much less with polymer furniture. This gun is beautifully put together and has already been broken in. I've only put about 300 rounds through it, just getting...
Longer "NATO" length AK stock, made in the USA for Arsenal USA. Removed from my SLR-107R after 240 rounds. Like new condition.
Asking $40, Check, Money Order, VenMo, or Paypal Friends and Family. Meet FTF at my place of business in Salem M-F 7am-noon, or ships in the Pacific Northwest by USPS...
SPF: For sale $125: Brand new Glock 19 80% frame kit. Received this less than a couple of weeks ago and decided to go a different route and never got to start this build. Just wanting to get what I put into it with the shipping and WA tax that was paid. I am willing to ship on your dime and...
My friend and I bought polymer 80 G19s to build as a Buddy project. Had problems when ordering of the website, and I wound up with a black frame. Was really hoping for gray (or FDE?). Anyone with an unmilled polymer 80 in one of those colors interested in a swap for Black? I'm looking for the...
I should’ve known better... just knocked this over while working on another rifle... and this happened...
I’ll be sending the lower back to TA And telling them to keep it.
Hey all. Started collecting parts for this and went another route instead.
Selling a -
1. 80% Blue Titanium P80 PF940CV1 frame (with original parts)
2. Lone Wolf frame kit
3. lone Wolf slide kit
4. Rival Arms guide rod assembly
Everything is brand new.
Asking $150 for everything picked up in...
Hi I just ordered the slide with parts and lower with parts and jig for 500$ I also have all the tools to build it if wanted, After buying I called local gun stores all of them saying I have to be 21 to build it myself so I’m looking for trades for a rifle semi automatic, YOU CAN NOT LEGALLY...
So I purchased a polymer 80 and called multiple gun stores and all them say I can legally buy it but the second I put it together it’s illegal for me, so I’m not Sure who I can talk to who really knows there laws to get the go ahead for lane county just in case I know I can open carry but if a...
Brand new Wilson combat polymer frame for full size sig p320. Asking $85. That's what I paid with over night shipping. Willing to trade for 200 rounds of 9mm. If you paid less than $20 per box than it's a great deal for you.
I've got a ton of small parts. And down to do trades.
I need a trigger pin.
And the lone wolf or the upgraded glock ejector.
I've got other small.parts to pay it forward and get this going too.
Build on!
I have a pair of holsters for Polymer 80s for sale. Both were for a PF940C, Polymer80’s version of the Glock 19.
Left: Squared Away Customs IWB, OD, RH orientation, optic cut, no weapon light. Asking $50
Right: QVO Tactical Secondary OWB, black kydex with Multicam fabric overlay, drilled for...
Hello all!
Was gonna build my own, but I think I'm gonna do something else instead. So this is up for sale!
Brand NEW PF940v2 Full (G17 Size) Frame 80% Lower Cobalt (like a dark grey)
Brand NEW Lone Wolf Lower Parts Kit
Brand NEW Lone Wolf Extended Mag Release
All of this for $200 local...
I have a polymer 80 glock 19 frame already drilled out and ready for internals.
125 or trade for compound bow sight, arrows, RC car or guitar stuff. Thanks
I bought this last year because I couldn’t find a .308 lower. While completing my parts order for my AR 15 build I was able to find a order a serial numbered .308 lower from Aero P so I no longer need the Polymer 80 lower and am offering it up for sale or trade. I paid $160 +$10 shipping for the...
I have 2K rounds for 9mm TULA steel cased ammo, it’s good and has run smoothly in over 11 different 9mm’s I have, I ran through 1650 rounds without an issue.
$499 per 1K
This is my cost price before shipping.
willing to trade for other ammo: 223/556, 5.7x28
AR45/10mm is what I’m really looking...