Iyini impahla ye-PP? Ukuhlaziywa okuphelele kwezakhiwo, ukusetshenziswa kanye nezinzuzo zezinto ze-PP
Emkhakheni wamakhemikhali nezinto zokwakha, "yini i-PP" umbuzo ovamile, i-PP isifinyezo se-Polypropylene, i-polymer esetshenziswa kakhulu ye-thermoplastic. Kulesi sihloko, sizohlaziya ngokuningiliziwe izakhiwo, inqubo yokukhiqiza, izindawo zokufaka isicelo kanye nezinzuzo zezinto ze-PP ukuphendula umbuzo wokuthi iyini i-PP.
1. Yini i-PP? Imiqondo eyisisekelo kanye nezakhiwo
Izinto ze-PP, okungukuthi i-polypropylene, i-thermoplastic eyenziwe nge-propylene monomer ngokusebenzisa ukusabela kwe-polymerisation. Inesakhiwo esiwumugqa, esinikeza ibhalansi yokuqina nokuqina ezindaweni zayo ngenxa yesakhiwo sayo esiyingqayizivele seketango lamangqamuzana. I-Polypropylene inokuminyana okuphansi okungaba ngu-0.90 g/cm³ kuphela, okuyenza ibe enye yamapulasitiki alula kakhulu, into eyenza ilungele ukusetshenziswa okuningi.
I-Polypropylene imelana kakhulu namakhemikhali, imelana kahle kakhulu nama-asidi amaningi, izisekelo, usawoti kanye nezincibilikisi zemvelo. Iphuzu layo eliphezulu lokuncibilika (cishe i-130-170 ° C) linikeza izinto ze-PP ukuzinza okuhle ezindaweni zokushisa okuphezulu futhi zibenza bangakwazi ukuguquguquka. Ngakho-ke, izinto ze-PP zisetshenziswa kabanzi ezimeni ezidinga ukumelana nokushisa nokugqwala.
2. Inqubo yokukhiqiza yezinto ze-PP
Ukukhiqizwa kwezinto ze-PP kuncike kakhulu kubuchwepheshe be-catalyst kanye nezinqubo ze-polymerization. Izindlela ezijwayelekile zokukhiqiza i-polypropylene zifaka i-gas-phase polymerisation, i-liquid-phase polymerization kanye ne-intrinsic polymerisation. Izindlela ezihlukene ze-polymerisation zithinta isisindo samangqamuzana, i-crystallinity kanye nezakhiwo ezibonakalayo zezinto ze-PP, ezibuye zinqume insimu yazo yokusetshenziswa.
Izinhlobo ezahlukene ze-polypropylene, njenge-homopolymerised polypropylene (Homo-PP) kanye ne-copolymerised polypropylene (Copo-PP), zingatholakala ngokulungisa uhlobo lwe-catalyst kanye nezimo zokusabela phakathi nenqubo yokukhiqiza. I-Homopolymerised polypropylene inokuqina okuphezulu nokumelana nokushisa, kuyilapho i-copolymerised polypropylene ivame ukusetshenziswa kwansuku zonke ngenxa yamandla ayo aphezulu omthelela.
3. Izindawo zokufaka izicelo eziyinhloko zezinto ze-PP
Izinto ze-PP zisetshenziswa ezinhlobonhlobo zezimboni ngenxa yezakhiwo zazo eziphakeme zomzimba namakhemikhali. Ekuphileni kwansuku zonke, i-PP isetshenziswa ekwenzeni izitsha zasendlini, ukupakishwa kokudla, amapayipi namathoyizi, njll. Embonini, i-PP isetshenziswa kabanzi ekwenzeni amapayipi amakhemikhali, amaphampu nama-valve, njll. Izinto ze-PP nazo zisetshenziswa ngobuningi ekukhiqizeni izindwangu, amadivaysi ezokwelapha kanye nezingxenye zezimoto.
Ikakhulukazi embonini yokupakisha, i-PP isiphenduke into ekhethwayo ngenxa yokungafihli kahle kwayo nokumelana nokushisa, njengebhokisi elivamile lokulondoloza ukudla okusobala, i-tableware ye-oven microwave, njll. Ukusetshenziswa kwezinto ze-PP emkhakheni wezokwelapha nakho kuyanda, ikakhulukazi amasirinji alahlwayo, izitsha zaselabhorethri neminye imikhiqizo enezidingo eziphezulu ze-aseptic.
4. Izinzuzo zezinto ezibonakalayo ze-PP namathemba emakethe
Impahla ye-PP ithandwa kakhulu ikakhulukazi ngenxa yesisindo sayo esilula, ukumelana nokushisa, ukumelana namakhemikhali nokusebenza okuhle kokucubungula.PP iphinde ibe nokufakwa kahle kukagesi nezici zokuvikela imvelo, ingagaywa kabusha ukuze kuncishiswe ukungcoliswa kwemvelo.
Ngokubuka kwemakethe, ngomqondo wentuthuko esimeme kanye nokuvikelwa kwemvelo eluhlaza, isidingo semakethe sezinto ze-PP sizokhula. Ukuphinda kusetshenziswe kabusha kwe-polypropylene kanye nezici zokukhishwa kwekhabhoni ephansi kuyenza ibaluleke kakhulu ezinhlelweni ezisafufusa ezihlukahlukene, njengemithombo yamandla emisha nezinto ezithinta imvelo.
5. Ukungalungi nezinselele zezinto ze-PP
Naphezu kwezinzuzo zayo ezisobala, i-PP inokushiyeka okuthile, njengokumelana nomthelela ongemuhle wezinga lokushisa eliphansi kanye nokungamelani kahle nokukhanya kwe-UV. Ekusetshenzisweni okungokoqobo, lokhu kushiyeka kungathuthukiswa ngokuhlanganisa ukuguqulwa, ukungezwa kwama-antioxidants kanye nezithasiselo ezimelana ne-UV. Ngokuthuthukiswa kobuchwepheshe, ucwaningo nokuthuthukiswa kwe-polypropylene esekelwe ku-bio kanye nama-copolymers asebenza kahle kakhulu kuyaqhubeka, kuvula amathuba amasha okusetshenziswa kwe-polypropylene materials.
Isiphetho
Iyini i-PP impahla? Kuyi-thermoplastic enezakhiwo ezinhle kakhulu kanye nezinhlelo eziningi ezahlukahlukene. Ngokuhlaziya okuningiliziwe kwezakhiwo zayo, izinqubo zokukhiqiza, izindawo zokufaka izicelo namathemba emakethe, singabona isimo esingenakuthathelwa indawo sezinto ze-PP ezimbonini ezihlukahlukene. Ngokuthuthuka kobuchwepheshe nezidingo zokuvikela imvelo, ububanzi bokusetshenziswa kwezinto ze-PP buzoqhubeka nokukhula, kulethe ukunethezeka okwengeziwe kanye nokuqamba okusha embonini nempilo yesimanje.
Sithemba ukuthi ngokuhlaziywa okuningiliziwe kwalesi sihloko, unokuqonda okujulile kokuthi i-PP iyini impahla.