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The generalised chemical structure of polyisocyanurate showing the isocyanurate group. The polyols are abbreviated as R-groups.. Polyisocyanurate (/ ˌ p ɒ l ɪ ˌ aɪ s oʊ s aɪ ˈ æ nj ʊər eɪ t /), also referred to as PIR, polyol, or ISO, is a thermoset plastic [1] typically produced as a foam and used as rigid thermal insulation.
Polyisobutene (polyisobutylene) is a class of organic polymers prepared by polymerization of isobutene.The polymers often have the formula Me 3 C[CH 2 CMe 2] n H (Me = CH 3).They are typically colorless gummy solids.
A multi-family residential building under construction with rigid panel exterior insulating sheathing. Rigid panel insulation, also referred to as continuous insulation, [1] can be made from foam plastics such as polyurethane (PUR), polyisocyanurate (PIR), and polystyrene, or from fibrous materials such as fiberglass, rock and slag wool.
Four isomers of Polyisoprene. In principle, the polymerization of isoprene can result in four different isomers.The relative amount of each isomer in the polymer is dependent on the mechanism of the polymerization reaction.
Butyl rubber gloves. Butyl rubber, sometimes just called "butyl", is a synthetic rubber, a copolymer of isobutylene with isoprene.The abbreviation IIR stands for isobutylene isoprene rubber.
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Spray foam insulation extruding from a duct. Spray foam (expanding foam in the UK) is a chemical product created by a chemical reaction of two component parts, commonly referred to as side A and side B. [1] Side A contains very reactive chemicals known as isocyanate.
This is a general suggestion for all chemistry articles, but I was reviewing this one for a residential application and wanted to know the following: