Kungani irabha idinga ukufakwa vulcanized?Yiziphi izinzuzo ze-vulcanizing rubber?
Nakuba irabha yerabha eluhlaza nayo inezici ezithile eziwusizo zohlelo lokusebenza, iphinde ibe nezithiyo eziningi, njengamandla aphansi nokunwebeka okuphansi;Ukubanda kwenza kube nzima, ukushisa kukwenza kunamathele;Ukuguga kulula, njll. Emandulo ngeminyaka yawo-1840s, kwatholakala ukuthi irabha ingahlangana ngokuyishisisa kanye nesibabule.Ngakho-ke, kuze kube manje, nakuba iraba ingaxhunyaniswa hhayi kuphela nesibabule, kodwa futhi namanye ama-agent amaningi amakhemikhali e-crosslinking kanye nezindlela zomzimba nezamakhemikhali, embonini yenjoloba, bekulokhu kuyisiko ukubhekisela ku-rubber crosslink ngokuthi "vulcanization", kuyilapho. imboni yokucubungula ipulasitiki kwesinye isikhathi ibhekisa ekuphenduleni kokuhlangana njengokulapha.I-Vulcanization ithuthukisa kakhulu ukusebenza kwenjoloba eluhlaza, inweba ububanzi bokusetshenziswa kwenjoloba, futhi yenza isisekelo sokukhiqizwa kwezimboni ezinkulu kanye nokusetshenziswa kwenjoloba.
I-Rubber vulcanization ingenye yezinqubo eziyinhloko ekucutshungulweni komkhiqizo wenjoloba, futhi kuyisinyathelo sokugcina sokucubungula ekukhiqizeni umkhiqizo wenjoloba.Kule nqubo, irabha ibhekana nochungechunge lwezinguquko eziyinkimbinkimbi zamakhemikhali, isuka ehlanganisweni yepulasitiki iye enjolobeni enwebeka kakhulu noma eqinile exhumene ne-cross-link, ukuze kutholwe izakhiwo eziphelele zomzimba, zemishini kanye namakhemikhali, futhi kuthuthukiswe futhi kwandiswe inani lokusetshenziswa nokusetshenziswa. ububanzi bezinto zenjoloba.Ngakho-ke, i-vulcanization ibaluleke kakhulu ekukhiqizeni nasekusetshenzisweni kwenjoloba kanye nemikhiqizo yayo.
Umqondo we-vulcanization
I-Vulcanization isho umkhiqizo osuqedwe kancane owenziwe ngezinto zenjoloba ezinepulasitiki ethile kanye ne-viscosity (irabha eluhlaza, inhlanganisela yepulasitiki, irabha exubile) ngokucubungula okufanele (njengokugingqika, ukukhishwa, ukubumba, njll.) ngaphansi kwezimo ezithile zangaphandle, ngamakhemikhali. izici (ezifana nesistimu ye-vulcanization) noma izici ezibonakalayo (ezifana no-γ Inqubo yokuguqula umthelela wemisebe ibuyele emikhiqizweni yenjoloba ethambile noma imikhiqizo yenjoloba eqinile ukuze kutholwe ukusebenza okusebenzayo. Phakathi nenqubo ye-vulcanization, izimo zangaphandle (ezifana nokushisisa noma imisebe) ibangele ukusabela kwamakhemikhali phakathi kwerabha eluhlaza ezingxenyeni zentokozo yenjoloba kanye ne-ejenti elimazayo noma phakathi kwerabha eluhlaza kanye nerabha eluhlaza, okuholela ekuxhumekeni kwama-macromolecules enjoloba alinganayo abe ama-macromolecule akhiwe yinethiwekhi enezinhlangothi ezintathu.
Ngalokhu kusabela, izici ezihlukahlukene zenjoloba ziye zathuthukiswa kakhulu, okwenza imikhiqizo yenjoloba ikwazi ukuthola izakhiwo ezingokomzimba, ezomshini, nezinye ezingahlangabezana nezidingo zokusetshenziswa komkhiqizo.Ingqikithi ye-vulcanization iwukuxhumanisa, okuyinqubo yokuguqula izakhiwo zamangqamuzana erabha ewumugqa zibe izakhiwo zenethiwekhi yendawo.
Inqubo ye-sulfurization
Ngemva kokukala inani lerabha exubile kanye ne-ejenti elimazayo, isinyathelo esilandelayo ukwengeza i-ejenti elimazayo.Kunconywa ukulandela izinyathelo ezilandelayo ukuze uqedele.
1. Okokuqala, hlanza isigayo sokuvula ukuze uqinisekise ukuhlanzeka kwaso ukuze uvimbele ukuxutshwa kokunye ukungcola.Bese ulungisa i-roller pitch ye-mill yokuvula ibe ubuncane futhi uthele irabha exubile emshinini wokuvula ukuze uthole iphasi elincane.Ngemva kokuqedwa kwephasi elincanyana, ukuhlukaniswa kwe-roll ye-mixer kufanele kukhuliswe ngokufanelekile ukuze kuqinisekiswe ukuthi irabha exubile isongwe ngokulinganayo emiqulu.Izinga lokushisa elingaphezulu lerabha exubile kufanele libe ngu-80oC.
2. Ngokulungisa i-roller pitch kanye namanzi okupholisa ngokufanele, izinga lokushisa lenjoloba exubile lilawulwa cishe ku-60-80 ° C. Kuleli qophelo, i-agent e-vulcanizing iqala ukungezwa ku-rubber exutshwe.
Isikhathi sokuthumela: Oct-25-2023
