Polyamides

{|style="border: 1px solid; float: right; width: 250px;" !colspan="2" style="text-align: center;"| Nylon 6 class=skin-invert|320px|Nylon Nylon 6,6 |- |Density |1.15 g/cm3 |- style="background:#eee;" |Electrical conductivity (σ) |10−12 S/m |- |Thermal conductivity |0.25 W/(m·K) |- style="background:#eee;" |Melting point |463–624 K 190–350 °C 374–663 °F |}

A polyamide is a polymer with repeating units linked by amide bonds.

filament material produced by spiders

nylon polymer and synthetic fibre

thumb|right|Spools of aramid yarn destined for body armor thumb|right|Fiberglass–aramid hybrid cloth Aramid, or aromatic polyamide fibers are a class of strong, heat-resistant, synthetic fibers, commonly used in aerospace and military applications - e.g., ballistic-rated body armor fabric and ballistic composites, marine cordage and hull reinforcement - as a substitute for asbestos, and in lightweight consumer items, such as phone cases and tennis rackets.

Urea-formaldehyde (UF), also known as urea-methanal, so named for its common synthesis pathway and overall structure, is a nontransparent thermosetting polymer. It is produced from urea and formaldehyde. These resins are used in adhesives, plywood, particle board, medium-density fibreboard (MDF), and molded objects. In agriculture, urea-formaldehyde compounds are one of the most commonly used types of slow-release fertilizer.

nylon polymer and synthetic fibre

In polymer chemistry, the term prepolymer or pre-polymer, refers to a monomer or system of monomers that have been reacted to an intermediate-molecular mass state. This material is capable of further polymerization by reactive groups to a fully cured, high-molecular-mass state. As such, mixtures of reactive polymers with un-reacted monomers may also be referred to as pre-polymers. The term "pre-polymer" and "polymer precursor" may be interchanged.

'Poly(N-isopropylacrylamide) (variously abbreviated PNIPA, PNIPAM, PNIPAAm, NIPA, PNIPAA or PNIPAm') is a temperature-responsive polymer that was first synthesized in the 1950s. It can be synthesized from N-isopropylacrylamide which is commercially available. It is synthesized via free-radical polymerization and is readily functionalized making it useful in a variety of applications.

250px|thumb|Repeating unit of polyphthalamide Polyphthalamide (aka. PPA, High Performance Polyamide) is a subset of thermoplastic synthetic resins in the polyamide (nylon) family defined as when 55% or more moles of the carboxylic acid portion of the repeating unit in the polymer chain is composed of a combination of terephthalic (TPA) and isophthalic (IPA) acids. The substitution of aliphatic diacids by aromatic diacids in the polymer backbone increases the melting point, glass transition temperature, chemical resistance and stiffness.

Cyamelide is an amorphous white solid with the approximate formula (HNCO)x. It is the product of the polymerisation of cyanic acid together with its cyclic trimer cyanuric acid. It is a porcelain-like white substance which is insoluble in water.

a polyamide

polymer of glutamic acid