3 The resistance of polypropyleneproduced by Basell 133 sold under the 133 to chemicals is governed byits nonpolar characterPolypropylene is resistant to manypolar liquids such as alcohols or ID: 522844
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Polypropylene 3 The resistance of polypropyleneproduced by Basell … sold under the … to chemicals is governed byits non-polar character.Polypropylene is resistant to manypolar liquids such as alcohols, organicacids, esters, and ketones. However,it is swollen by aliphatic and aromatichydrocarbons and by halogenatedhydrocarbons. The less crystallinethe polymer, the greater the swelling.Swelling also causes a drop inmechanical strength. However, afterevaporated, polypropylene regains itsoriginal properties.Polypropylene is resistant to aqueoussolutions of inorganic salts and toalmost all inorganic acids and alkalistemperatures above 60C. However,strong oxidizing agents(e.g. chloro-will attack polypropylene at roomtemperature. For medical applicationsethylene oxide or gamma ray, BasellIf you are interested in such grades,epresentative.observed to cause environmentalstress-cracking in polypropylene.Polypropylene is partially permeablearomatic hydrocarbons, and halo-genated hydrIn the following tables are the resultsof numerous tests according toISO 175. The results are based on mm thick pressed samples stored fortaken into account where available, isassessment of chemical resistance isswollen sample according to ISO 527-2.can depend on the shape and require-ments of the product.practical tests are carried out to confirmsuitability.In the tables abbreviations are used asCold sat.=cold saturated solutionb=measured value at boiling pointThe resistance tables are marked withtensile yield stress.imited resistanceyield stress is noticeably reduced.ests should be carried out toconfirm suitability in critical cases.Not resistantSwelling is severe and tensileyield stress is severely reduced.Polypropylene