Ukusetshenziswa Kwamakhemikhali E-Polymer Empilweni
Ama-polymer angenye yamaqembu amakhemikhali ahlotshaniswa kakhulu nokuphila kwabantu banamuhla. Cishe yonke into esiyithintayo—kusukela ezitsheni zokuphuza nezingubo kuya kumadivayisi ezokwelapha ngisho nezingxenye zezimoto—ihlobene nama-polymer. Kalula nje, ama-polymer angachazwa njengama-molecule amakhulu (ama-macromolecule) akhiwe ngamayunithi amancane, aphindaphindayo abizwa ngokuthi ama-monomers. Lapho la ma-monomers ehlangana ngokusebenzisa ukusabela kwamakhemikhali, amaketanga amade akhiwa ngezakhiwo ezihlukile: angaba nezimo eziguquguqukayo noma eziqinile, acacile noma angacaci, amelane nokushisa noma ancibilike kalula, futhi amelane nokushayisana noma abole kalula. Lokhu kuhlukile yikho okwenza ama-polymer abe yizinto ezibalulekile emikhakheni ehlukahlukene.
Incazelo kanye nezinhlobo zama-polymer
Ngokusekelwe emvelaphi yawo, ama-polymer ahlukaniswe ngama-polymer emvelo kanye nama-polymer okwenziwa. Ama-polymer emvelo yilawo atholakala emvelweni, njenge-cellulose okhunini kanye nokotini, isitashi kuma-tuber, amaprotheni ezintweni eziphilayo, kanye nerabha yemvelo evela emanzini ezitshalo. Ama-polymer okwenziwa yilawo enziwa ngabantu ngezinqubo zezimboni, njenge-polyethylene (PE), i-polypropylene (PP), i-polyvinyl chloride (PVC), i-polystyrene (PS), kanye ne-polyester.
Ngaphezu kwalokho, ama-polymer angahlukaniswa ngokusekelwe ekuziphatheni kwawo ngokushisa: ama-thermoplastic nama-thermoset. Ama-thermoplastic angancibilikiswa futhi aphinde akhiwe kabusha ngokuphindaphindiwe, okwenza kube lula ukuwasebenzisa kabusha (isb., i-PE, i-PP, i-PET). Ama-thermoset, ngakolunye uhlangothi, aqina unomphela ngemva kokufudumala nokwakheka; lezi zinto kunzima ukuzisebenzisa kabusha (isb., ama-resin e-Bakelite nama-epoxy). Ukuqonda lezi zinhlobo zama-polymer kusiza ekunqumeni ukusetshenziswa kwawo emphakathini.
Ama-polymer ekupakisheni nasezintweni zasekhaya
Enye yezindlela ezisetshenziswa kakhulu ngama-polymer isekupakishweni. Amapulasitiki afana ne-PE kanye ne-PP asetshenziswa kabanzi ezikhwameni zokuthenga, ezingxobeni zokudla, emabhodleleni, nasezitsheni zokugcina izinto. I-PET (i-polyethylene terephthalate) ivame ukusetshenziswa emabhodleleni okuphuza ngoba ilula, iqinile, futhi iyabonakala. Ekhaya, ama-polymer atholakala ezintweni ezahlukahlukene: amabhakede, izitsha, izihlalo zepulasitiki, ama-rack okugcina izinto, ngisho nezingubo ezinganamatheli emabhodweni asebenzisa ama-polymer e-fluorine njenge-PTFE.
Izinzuzo zama-polymer ekupakisheni zifaka phakathi isisindo sawo esilula, izindleko zokukhiqiza eziphansi, kanye nokulula kokubumba imiklamo ethile. Ngaphezu kwalokho, amanye ama-polymer angasebenza njengezithiyo emhwamukweni wamanzi kanye namagesi, okusiza ekugcineni ikhwalithi yokudla. Kodwa-ke, ukusetshenziswa kwama-polymer ekupakisheni nakho kudala izinselele zemvelo uma kungaphathwa kahle, ikakhulukazi ngemfucuza yepulasitiki esetshenziswa kanye.
Ama-polymers Ezindwangu Nezingubo
Imboni yezindwangu ithembele kakhulu kuma-polymer. Imicu yokwenziwa efana ne-polyester, i-nylon, ne-acrylic iyizibonelo zama-polymer enziwa intambo bese elukwa ibe yindwangu. I-polyester ithandwa ngenxa yokumelana kwayo nokushwabana, ukoma okusheshayo, kanye nokuqina kwayo okulinganiselwe. I-nylon isetshenziswa kakhulu ezingutsheni zezemidlalo, ezikhwameni, nasezingutsheni zangaphandle ngenxa yokumelana kwayo nokuguguleka kanye nokuqina. I-Acrylic, okwamanje, ivame ukusetshenziswa njengendawo yoboya ngenxa yokufudumala kwayo.
Ama-polymer emvelo nawo adlala indima ebalulekile kule ndawo. Ukotini wakhiwe yi-cellulose, i-polymer yemvelo ekhululekile futhi emunca umjuluko. Uboya kanye nesilika kuyi-polymer yemvelo, esekelwe kumaprotheni enikeza izici zayo ezihlukile: uboya bufudumele futhi bunwebeka, usilika ubushelelezi futhi uyakhazimula. Inhlanganisela yemicu yemvelo neyenziwe ivame ukukhethwa ukuze kufezwe ibhalansi phakathi kwenduduzo, ukuqina, kanye nezindleko.
Ama-polymers kwezeMpilo kanye nezokwelapha
Umkhakha wezokunakekelwa kwempilo ungomunye wemikhakha eye yazuza kakhulu ekuthuthukisweni kwezinto ze-polymer. Amadivayisi amaningi ezokwelapha enziwe ngama-polymer ngoba ahlanzekile, alula, futhi angasetshenziswa wodwa ukuvimbela ukudluliselwa kwezifo. Izibonelo zifaka phakathi amasirinji, amapayipi omshini wokuwasha, izikhwama zegazi, amagilavu ezokwelapha, imaski, kanye nokupakishwa kwemithi ehlukahlukene.
Ngaphezu kwalokho, ama-polymer asetshenziswa kubuchwepheshe bokufakelwa kanye nobunjiniyela bezicubu. Ama-suture okuhlinzwa angenziwa ngama-polymer abola, ngakho-ke akudingeki asuswe. Izinto ezifana ne-polylactide (PLA) kanye ne-polyglycolide (PGA) zingawohloka kancane kancane emzimbeni. Ezinye izinhlobo zama-hydrogel—ama-polymer angagcina amanzi amaningi—zisetshenziswa futhi kuma-contact lens, ama-wound dressing anamuhla, kanye nezinhlelo zokulethwa kwemithi ezilawula ukukhishwa kwemithi kancane.
Ama-polymer kwezokuThutha kanye nezimboni
Emikhakheni yezimoto nezokuthutha, ama-polymer asetshenziselwa ukunciphisa isisindo semoto nokuthuthukisa ukusebenza kahle kukaphethiloli. Izingxenye eziningi zangaphakathi, njengeedeshibhodi, amaphaneli eminyango, kanye nezihlalo, zisebenzisa ama-polymer. Ngaphezu kwalokho, izinhlanganisela ezisekelwe ku-polymer eziqiniswe nge-fiber (isb., i-fiberglass noma i-carbon fiber) zisetshenziswa ezimotweni ezithile ngenxa yamandla azo kodwa isisindo sazo silula.
Embonini, ama-polymer akhona kumapayipi (i-PVC), ezimbozweni zekhebula, ezimvini nasezimbozweni, opende abavikelayo, kanye nezinamathiseli. Ama-resin e-epoxy kanye ne-polyurethane aziwa ngokunamathela kwawo okuhle kakhulu nokuqina, okwenza abe usizo ezimbozweni zaphansi zefektri, ezingxenyeni zikagesi, kanye nasekwakheni. Ama-polymer asetshenziswa kabanzi njengezivikeli zikagesi ngenxa yamandla awo okuvimba ugesi nokubekezelela izimo ezithile zemvelo.
Ama-polymers ku-Electronics kanye nobuchwepheshe besimanje
Intuthuko yezobuchwepheshe nayo iqhuba ukusungula izinto ezintsha kuma-polymer akhethekile. Amadivayisi amaningi kagesi asebenzisa ama-polymer njengezivikelo, ama-cable sheath, ama-casing, kanye nezendlalelo zokuvikela izingxenye. Izibonisi eziguquguqukayo kanye nezinhlobo ezithile zezinzwa zisebenzisa ama-polymer aqhuba ugesi, ama-polymer angaqhuba ugesi ngemva kokuguqulwa. Ngaphezu kwalokho, ama-polymer asetshenziswa kumabhethri kanye namaseli athile elanga njengengxenye ye-polymer electrolyte noma i-thin-film coating esiza inqubo yokuguqulwa kwamandla.
Enkathini yanamuhla, ucwaningo ngama-biopolymers kanye nama-polymers anobungani nemvelo nalo luye lwaqina. Umgomo ukukhiqiza izinto ezigcina ukusebenza kodwa ezinomthelela ophansi kwezemvelo, njengepulasitiki ebola kalula noma engaphinde isetshenziswe ngempumelelo.
Izinselele Zemvelo kanye Nemizamo Yesixazululo
Naphezu kwezinzuzo zawo ezinkulu, ukusetshenziswa kwama-polymers—ikakhulukazi amapulasitiki—kubangela izinkinga ezinkulu zemfucuza. Ipulasitiki engalawulwa ingangcolisa inhlabathi, imifula, kanye nolwandle, okungenzeka iphenduke ama-microplastic angena ochungechungeni lokudla. Le nselele ayibangelwa nje ukuthi ama-polymers “amabi,” kodwa kunalokho ibangelwa ukusetshenziswa ngokunganaki kanye nemikhuba yokuphatha ukuphela kokuphila.
Kuyaqhubeka nokuthuthukiswa izixazululo ezahlukahlukene, kusukela ekunciphiseni amapulasitiki asetshenziswa kanye kuphela, ukuthuthukisa izinhlelo zokuvuselela kabusha, kuya ezintweni ezintsha ezifana nama-bioplastic. Isibonelo se-bioplastic yi-PLA, eyenziwe ngemithombo evuselelekayo njengesitashi sommbila noma umoba. Kodwa-ke, kubalulekile ukuqonda ukuthi akuwona wonke ama-bioplastic abola ngokuzenzakalelayo endaweni evulekile; amanye adinga izimo ezikhethekile, njengezindawo zokufaka umquba ezimbonini. Ngakho-ke, imfundo yomphakathi kanye nezinqubomgomo zokuphathwa kwemfucuza zihlala zibalulekile.
I-Penutup
Ama-polymer ayizinto ezidlala indima ebalulekile empilweni yansuku zonke. Kusukela ekupakisheni kokudla nezingubo kuya kumadivayisi ezokwelapha kanye nezokuthutha kuya kubuchwepheshe be-elekthronikhi, ama-polymer anikeza ukulula, ukusebenza kahle, kanye nokusungula izinto ezintsha. Izakhiwo zawo eziphakeme—ezilula, eziqinile, eziguquguqukayo, futhi eziguquguqukayo—zenza ama-polymer abe yinto emangalisayo ezisetshenziswayo eziningi. Kodwa-ke, lezi zinzuzo ezibalulekile kumele zilinganiswe nokusetshenziswa okunesibopho kanye nokuphathwa kwemfucuza. Ngokwamukela imikhuba yokunciphisa ukusetshenziswa kanye, ukuhlunga kanye nokuvuselela kabusha, kanye nokukhuthaza ukuthuthukiswa kwama-polymer anobungani nemvelo, singaqhubeka nokujabulela izinzuzo zama-polymer ngaphandle kokubeka impilo yemvelo engcupheni. Ngakho-ke, ama-polymer awawona nje uphawu lwentuthuko yezinto ezibonakalayo, kodwa futhi ayingxenye yesisombululo sendlela yokuphila esimeme kakhudlwana.
