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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.
Mossberg 500 12 gauge factory action tubes for sale. 7 3/4 length for all 3, action tube nut included. 60 each for 2 on right of picture, One on the left has been traded. All sold
Also have 2 polymer forend pieces, 10 each.
Perfect to upgrade to the 2 arm forend or upgrade your Maverick 88 to be...
From Springfield: "Engineered with superior ergonomics and built to withstand the harshest conditions, the Echelon™ 4.5" 9mm handgun sets a new standard for modern, striker-fired duty pistols. With a host of patent pending features, this modular pistol is designed around a robust stainless steel...
PF940CV1 Dark earth colored 80 percent polymer frame with jig and lower parts kit. Never assembled and it great condition. Comes with factory lower parts kit. 150.00 dollars or best offer. You can text 541-918-1399 if interested. I can provide pictures.
This is a modern take in the classic "CCO" (Combat Commander / Officer) formula using the Smith and Wesson M&P M2.0 as the platform. It takes the M2.0 4.25" upper (off another gun) and incorporates a (brand new) M2.0 Compact lower. I added a polymer ApexTactical trigger. This has a manual thumb...
Is this old news?
LAPD wins $5million suing maker of 'ghost gun' kits
By Christian Martinez
Los Angeles Times
Now, the company has settled the suit with the city for $5million and must conform to multiple gun sales standards.
This stock is new in the sealed factory box. Purchased for a project that went a different direction.
From Magpul:
MAG548-ODG: The Magpul Hunter X-22 chassis is an ergonomic, full-featured stock for the ubiquitous Ruger 10/22 rifle. Made from high quality reinforced polymer, the Hunter X-22...
Everything new never used. Can meet at Sound Loan in Everett, Precise Shooter in Woodinville, or Pantel Tactical in Renton. Everything should transfer same day as others.
Aero Precision m4e1 receiver set $160.
Brownells brn 180 lower $120.
American Defense Manufacturing UIC Full ambi lower...
Used double action 9mm conceal carry carry handgun for sale. Comes with one 10 round magazine. Made in the USA. Comfortable in most hands and will fit in pocket.
Transfer at FFL in Salem
I was working on a pseudo retro-modern build but decided to go a different direction. This is my second ke-arms lower, and they are absolutely AWESOME. My other one has thousands of rounds through. 1.7lbs completed, I installed an larue trigger, tested with another upper 100rds no problem. This...
Up for sale is a CAA Micro Conversion Kit Gen2 for the Polymer 80,comes with all paperwork.trade for silver or let me know what trades you got.This only fits the Polymer 80.
Thankyou for looking.