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YiniUses kanye Nezakhiwo zePi-olystyreneIsibuko Ishidi

I-Polystyrene (PS) iyi-polymer yokwenziwa eyenziwe nge-styrene monomer, eyi-thermoplastic yempahla ecacile, e-amorphous, engekho polar okulula ukuyicubungula futhi engaguqulwa kalula ibe inombolo enkulu yemikhiqizo eqedwe kancane njengamagwebu, amafilimu, namashidi. .Ingenye yepulasitiki enkulu kakhulu yempahla, ehlanganisa cishe amaphesenti ayisikhombisa emakethe ye-thermoplastic isiyonke.

I-PS iyisivikeli sikagesi esihle kakhulu, inokucaca okuhle kakhulu kokubona ngenxa yokuntuleka kwekristalu, futhi inokumelana okuhle kwamakhemikhali kuma-asidi ahlanjululwe nezisekelo.Nokho, i-polystyrene inemikhawulo eminingana.Ihlaselwa yizincibilikisi ze-hydrocarbon, inomoya-mpilo omncane kanye nokungazweli kwe-UV, futhi iqinile, okusho ukuthi inamandla okuthinta kabi ngenxa yokuqina komgogodla we-polymer.Ngaphezu kwalokho, umkhawulo wayo wokushisa ongaphezulu wokusetshenziswa ngokuqhubekayo uphansi ngenxa yokuntuleka kwekristalu kanye nezinga lokushisa eliphansi lokushintsha kwengilazi elingu-100°C.Ngaphansi kwe-Tg yayo, inamandla aphakathi nendawo ukuya phezulu (35 – 55 MPa) kodwa amandla omthelela aphansi (15 – 20 J/m).Naphezu kwabo bonke lobu buthakathaka, ama-styrene polymers angamaplastiki empahla evolumu ekhangayo kakhulu.

Ishidi le-polystyrene livamise ukuba mncane futhi libe brittle kuneshidi le-acrylic kodwa ngokuvamile libiza kancane kunamanye amapulasitiki.Inokukhanya okuphezulu (okungokwesibili kuphela kumashidi e-acrylic ekudluliseni ukukhanya), ukumelana nomthelela wayo, ukumelana nesimo sezulu kanye nokumelana nokuguga kubi kune-plexiglass, izakhiwo zemishini kanye nezakhiwo zokucubungula ezishisayo azifani ne-plexiglass, ubulukhuni bufana ne-plexiglass acrylic, amanzi. ukumuncwa kanye ne-thermal expansion coefficient ingaphansi kwe-plexiglass acrylic, kodwa intengo yayo iphansi kune-plexiglass acrylic.

I-Polystyrene iyimpahla ekhethwayo ezinhlelweni eziningi ezihlanganisa ukupakishwa kokudla, izimpahla zepulasitiki ezilahlwayo kanye nezingxenye zezicelo ze-optical, electronic/electric, kanye nezokwelapha.