3 ways Chinaâs economic slowdown will affect your finances. The focus on Chinese equity markets distracts us from the more important underlying development: Chinaâs economy is slowing, and it will have global implications. Photo by Luo Yunfei/CNSPHOTO/ChinaFotoPress via Getty Images.
A polyolefin is any of a class of polymers produced from a simple olefin (also called an alkene with the general formula C n H 2n) as a monomer.For example, polyethylene is the polyolefin produced by polymerizing the olefin ethylene. Polypropylene is another common polyolefin which is made from the olefin propylene.olyolefin properties range from liquidlike to rigid solids, and are primarily determined by their molecular weight and degree of crystallinity. Polyolefin degrees of crystallinity range from 0% (liquidlike) to 60% or higher (rigid plastics).
Polyvinyl fluoride (PVF) or â(CH 2 CHF) n â is a polymer material mainly used in the flammability-lowering coatings of airplane interiors and photovoltaic module backsheets.It is also used in raincoats and metal sheeting.Polyvinyl fluoride is a thermoplastic fluoropolymer with the repeating vinyl fluoride unit: It is structurally very similar to polyvinyl chloride. PVF has low permeability for vapors, burns very slowly, and has excellent resistance to weathering and staining.It is also resistant to most chemicals, except ketones and esters. It is available as a film in a variety of colors, and formulations for various end uses, and as a resin for specialty coatings.t is also used in raincoats and metal sheeting. Polyvinyl fluoride is a thermoplastic fluoropolymer with the repeating vinyl fluoride unit: It is structurally very similar to polyvinyl chloride. PVF has low permeability for vapors, burns very slowly, and has excellent resistance to weathering and staining.