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Polyacrylamide (PAM) or (PAA) is an acrylate polymer formed from acrylamide subunits that is readily cross-linked. Acrylamide needs to be handled using Good Laboratory Practices (GLP) to avoid poisoning since it is a neurotoxin. Polyacrylamide is not toxic, but un-polymerized acrylamide can be present in the polymerized acrylamide. Therefore it is recommended to handle it with caution. It is highly water-absorbent, forming a soft gel used in such applications as polyacrylamide gel electrophoresis and in manufacturing soft contact lenses. It is also used as a thickener and suspending agent.
It has also been advertised as a soil conditioner called Krilium by Monsanto in the 1950s and today "MP", which is stated to be a "unique formulation of PAM (water-soluble polyacrylamide)".
Ionic substances like salt cause polyacrylamide to release its absorbed substance.
Polyethylenes: Polyethylene (PE), Low density polyethylene (LDPE), High density polyethylene (HDPE), Linear low density polyethylene (LLDPE), Crosslinked polyethylene (XLPE), Ultra High Molecular Weight Polyethylene (UHMWPE)
Other Polyolefins: Polypropylene (PP), Biaxially-oriented polypropylene, Polybutylene (PB), Polyisobutene (PIB)
Polyacrylates: Polymethyl methacrylate (PMMA), polymethyl acrylate (PMA), hydroxyethyl methacrylate (HEMA), Sodium polyacrylate
Polystyrenes: Polystyrene (PS), High impact polystyrene (HIPS), Extruded polystyrene (XPS), Expanded Polystyrene
Polyesters: Polyethylene terephthalate (PET)
Polysulfones: Polysulfone (PSU), Polyarylsulfone (PAS), Polyethersulfone PES, Polyphenylsulfone (PPS)
Polyamides: Polyamide (PA), polyphthalamide (PPA), Bismaleimide (BMI), urea formaldehyde (UF)
Polyurethanes: Polyurethane (PU), Polyisocyanurate (PIR)
Chloropolymers: Polyvinyl chloride (PVC), Polyvinylidene dichloride (PVDC)
(Chloro)fluoropolymers: Fluoropolymer (FE), Polytetrafluoroethylene (PTFE), Polyvinylidene difluoride (PVDF), Polychlorotrifluoroethlyene (PCTFE), Ethylene chlorotrifluoroethlyene (ECTFE)
Other Homopolymers: Polycarbonate (PC), Polylactic acid (PLA), Polyacrylamide (PAM), Polyetheretherketone (PEEK)
Other Copolymers: Acrylonitrile butadiene styrene (ABS), Polybutadiene acrylonitrile (PBAN)