Ukusebenza kwe-PS (i-polystyrene) nezici zenqubo yokucubungula

1 .Ukusebenza kwe-PS

PS iyi-polymer e-amorphous, i-fluidity enhle, ukumuncwa kwamanzi okuphansi (ngaphansi kuka-00.2%), ipulasitiki ekhanyelayo kulula isikhunta futhi icutshungulwa. Imikhiqizo yayo izinga lokudlulisa ukukhanya okungama-88-92%, amandla ombala aqinile, ubulukhuni obuphezulu. Kodwa-ke, imikhiqizo ye-PS i-brittle, kulula ukukhiqiza ukuqhekeka kwengcindezi yangaphakathi, ukumelana nokushisa akulungile (60-80 ℃), akunabuthi, amandla adonsela phansi athile angaba ngu-1.04g/cm3 (okukhulu kancane kunamanzi).

Molding shrinkage (inani layo ngokuvamile liyi-0.004-0.007), igama elithi transparent PS libonisa kuphela ukubonakala kwe-resin, hhayi ubucwebe. (Izakhiwo zamakhemikhali nezomzimba: i-PS eningi yezohwebo iyimpahla esobala, engeyona ikristalu. I-ps inokusimama okuhle kakhulu kwejiyomethri, ukuzinza kwe-thermal, izakhiwo zokudlulisa amehlo, izici zokuvala ugesi, kanye nokuthambekela okuncane kakhulu kokumunca umswakama. Ikumelana namanzi , acwebise ama-asidi angaphili, kodwa angagqwala ama-acids aqinile e-oxidizing njenge-concentrated sulfuric acid, futhi angavuvuka futhi akhubazeke kwezinye izinyibilikisi zemvelo.)

2 .Izici zenqubo ye-PS

PS iphuzu lokuncibilika elingu-166 ℃, ukucutshungulwa izinga lokushisa ngokuvamile lifaneleka ku-185-215 ℃, izinga lokushisa elincibilikayo lingu-180 ~ 280 ℃, lezinto ezivimbela ilangabi umkhawulo walo ongenhla ongu-250 ℃, izinga lokushisa lokubola licishe libe ngu-290 ℃, ngakho-ke izinga lokushisa lokucubungula libanzi.

Isikhunta. izinga lokushisa ngu-40 ~ 50 ℃, ingcindezi yomjovo: 200 ~ 600bar, isivinini somjovo siyanconywa ukusebenzisa isivinini somjovo osheshayo, abagijimi namasango angasetshenziswa kuzo zonke izinhlobo ezivamile zamasango. Izinto ze-PS ngokuvamile azidingi ukuba zomiswe ngaphambi kokuthi zicutshungulwe ngaphandle kokuthi zigcinwe ngendlela engafanele. Uma ukoma kuyadingeka, izimo zokomisa ezinconyiwe zingu-80C kanye namahora ama-2 kuye kwangama-3.

Ngenxa yokushisa okukhethekile kwe-PS, ukukhiqizwa kwayo kokushabalaliswa kokushisa kwesikhunta okungase kube ukuphulukiswa ngokushesha okubandayo, izinga lokupholisa kunokuvamile. izinto zokusetshenziswa ukuba ngokushesha, vula isikhathi isikhunta kungaba ngaphambili. Isikhathi sayo sepulasitiki nesikhathi sokupholisa sifushane, ukubumba isikhathi somjikelezo sizonciphisa okunye; Imikhiqizo ye-PS enokwenyuka kwezinga lokushisa lesikhunta kanye nokucwebezela okungcono.

3. Ibanga lohlelo lokusebenza olujwayelekile

Imikhiqizo yokupakisha (iziqukathi, izigqoko, amabhodlela), izinto zokwelapha ezilahlwayo, amathoyizi, izinkomishi, imimese, izinti zamateyipu, amawindi eziphepho, kanye nemikhiqizo eminingi yegwebu - amakhreyithi amaqanda. Amathreyi okupakisha enyama nezinkukhu, amalebula amabhodlela nezinto zokupakisha ze-PS ezinegwebu, ukupakishwa komkhiqizo, izinto zasendlini (i-tableware, amathreyi, njll.), ugesi (iziqukathi ezisobala, ama-scatterer okukhanya, amafilimu avikelayo, njll.).