Ifu ya polymer itatanye hamwe nibindi bifata umubiri (nka sima, lime yatoboye, gypsumu, ibumba, nibindi) hamwe nibintu bitandukanye, ibyuzuza nibindi byongerwaho [nka hydroxypropyl methylcellulose, polysaccharide (krahisi ether), fibre fibre, nibindi] ni mumubiri. kuvangwa no gukora minisiteri yumye.Iyo ifu yumye yumye yongewe mumazi hanyuma ikayungurura, hifashishijwe ingufu za hydrophilique irinda colloid hamwe nimbaraga zo kogosha imashini, uduce twa poro ya latx irashobora gukwirakwira vuba mumazi, ibyo bikaba bihagije kugirango ifu ya redxersible latx isubirwe neza.Ibigize ifu ya reberi iratandukanye, igira ingaruka kuri rheologiya ya minisiteri hamwe nubwubatsi butandukanye: guhuza ifu ya latex kumazi iyo yongeye gusubirwamo, ubwiza butandukanye bwifu ya latex nyuma yo gutatanya, ingaruka kuri umwuka wumwuka wa minisiteri no gukwirakwiza ibibyimba, Imikoranire hagati yifu ya reberi nibindi byongerera imbaraga ifu ya latex itandukanye ifite imirimo yo kongera amazi, kongera thixotropy, no kongera ubukonje.
Muri rusange abantu bemeza ko uburyo bwo gusubiramo ifu ya latex iteza imbere imikorere ya minisiteri nshya ni uko ifu ya latex, cyane cyane irinda colloid, ifitanye isano n’amazi iyo itatanye, ibyo bikaba byongera ubwiza bwikibabi kandi bikanoza ubumwe bwa ubwubatsi.
Nyuma ya minisiteri nshya irimo ifu ya latx ikwirakwizwa, hamwe no kwinjiza amazi hejuru yubutaka, gukoresha reaction ya hydration, hamwe no guhindagurika mukirere, amazi agenda agabanuka buhoro buhoro, ibice bya resin bigenda byegera buhoro buhoro, intera igenda ihinduka buhoro buhoro. , na resin gahoro gahoro gahuza hamwe.amaherezo polymerized muri firime.Inzira yo gukora firime ya polymer igabanijwemo ibyiciro bitatu.Mu cyiciro cya mbere, ibice bya polymer bigenda byisanzuye muburyo bwimikorere ya Brownian muri emulsion yambere.Amazi amaze guhinduka, kugenda kwingirangingo mubisanzwe birarenze kandi birabujijwe, kandi ubushyamirane hagati yamazi nikirere butera guhuza buhoro buhoro.Mu cyiciro cya kabiri, iyo ibice bitangiye guhura, amazi yo murusobe azenguruka binyuze muri capillary, kandi impagarara nyinshi za capillary zikoreshwa hejuru yibice bitera ihindagurika ryimiterere ya latex kugirango bahuze hamwe, kandi amazi asigaye yuzuza imyenge, kandi firime iba ikozwe hafi.Icyiciro cya gatatu nicyanyuma bituma ikwirakwizwa (rimwe na rimwe ryitwa kwifata) rya molekile ya polymer gukora firime ikomeza rwose.Mugihe cyo gukora firime, uduce duto twa mobile twigunze twihuza mugice gishya cya firime yoroheje hamwe na stress nyinshi.Ikigaragara ni uko kugira ngo ifu ya polymer itatanye ishobore gukora firime muri minisiteri yongeye gushyirwaho, ubushyuhe ntarengwa bwa firime (MFT) bugomba kwemezwa ko buri munsi yubushyuhe bwo gukiza bwa minisiteri.
Colloide - inzoga za polyvinyl zigomba gutandukana na sisitemu ya polymer membrane.Ntabwo arikibazo kiri muri sisitemu ya alkaline ciment mortar, kubera ko inzoga ya polyvinyl izajya itunganywa na alkali iterwa na hydrata ya sima, kandi adsorption yibikoresho bya quartz izatandukanya buhoro buhoro inzoga za polyvinyl na sisitemu, nta hydrophilique irinda colloid. ., Firime yakozwe mugukwirakwiza ifu ya latx idasubirwaho, idashobora gushonga mumazi, ntishobora gukora mubihe byumye gusa, ahubwo no mubihe byigihe kirekire byo kwibiza mumazi.Byumvikane ko, muri sisitemu itari alkaline, nka gypsumu cyangwa sisitemu ifite ibyuzuzo gusa, kubera ko inzoga za polyvinyl zikiriho igice muri firime yanyuma ya polymer, igira ingaruka ku kurwanya amazi ya firime, mugihe ubwo buryo budakoreshwa mumazi maremare. kwibiza, hamwe na polymer iracyafite imiterere yubukanishi, ifu ya polymer itatanye irashobora gukoreshwa muri sisitemu.
Hamwe nimikorere ya nyuma ya firime ya polymer, sisitemu igizwe ningingo zidasanzwe hamwe ningingo ngengabuzima ikorwa muri minisiteri yakize, ni ukuvuga skeleti yoroheje kandi ikomeye igizwe nibikoresho bya hydraulic, kandi ifu ya polymer isubirwamo ikorwa mu cyuho no hejuru.umuyoboro woroshye.Imbaraga zingana no guhuriza hamwe ya polymer resin firime yakozwe nifu ya latex irazamurwa.Bitewe nubworoherane bwa polymer, ubushobozi bwo guhindura ibintu burenze kure imiterere itajegajega yamabuye ya sima, imikorere yimiterere ya minisiteri iratera imbere, kandi ingaruka zo gukwirakwiza imihangayiko ziratera imbere cyane, bityo bikazamura imbaraga zo guhangana na minisiteri. .
Hamwe no kwiyongera kwibirimo byifu ya polymer itatanye, sisitemu yose itera imbere yerekeza kuri plastiki.Ku bijyanye n’ibintu byinshi birimo ifu ya latex, icyiciro cya polymer muri minisiteri yakize igenda irenga buhoro buhoro icyiciro cyibicuruzwa biva mu mahanga, minisiteri izahinduka ihindagurika kandi ihinduka elastomer, kandi ibicuruzwa biva muri sima bizahinduka "uwuzuza" ".Imbaraga zingana, elastique, guhinduka no gufunga ibimenyetso bya minisiteri yahinduwe hamwe nifu ya polymer itatanye.Kwinjiza ifu ya polymer itatanye ituma firime ya polymer (latex film) ikora no gukora igice cyurukuta rwa pore, bityo igafunga imiterere nini ya minisiteri.Indangantego ya latex ifite uburyo bwo kwagura uburyo bukoresha impagarara kuri ankorage hamwe na minisiteri.Binyuze muri izo mbaraga zimbere, minisiteri ifatwa muri rusange, bityo ikongerera imbaraga zifatika za minisiteri.Kuba polimeri ihindagurika cyane kandi yoroheje cyane itezimbere ubworoherane nubworoherane bwa minisiteri.Uburyo bwo kongera imbaraga zumusaruro nimbaraga zo kunanirwa nuburyo bukurikira: iyo hashyizweho ingufu, microcrack ziratinda kubera iterambere ryimiterere nubworoherane, kandi ntizikora kugeza igihe impagarara nyinshi zigeze.Mubyongeyeho, indangarugero za polymer zifatanije nazo zibuza guhuza microcrack mu gucamo.Kubwibyo, ifu ya polymer itatanye yongerera imbaraga kunanirwa no kunanirwa kwibikoresho.
Filime ya polymer muri polymer yahinduwe ya minisiteri igira ingaruka zikomeye cyane ku gukomera kwa minisiteri.Ifu ya redispersible polymer yifujwe kuri interineti igira urundi ruhare rwingenzi nyuma yo gutatanwa no gushingwa muri firime, aribyo kongera guhuza ibikoresho bihuye.Muri microstructure yubuso bwimbere hagati yifu ya polymer yahinduwe ceramic tile ihuza minisiteri na ceramic tile, firime yakozwe na polymer ikora ikiraro hagati ya vitamine ceramic tile ifite amazi make cyane hamwe na materique ya sima.Ahantu ho guhurira hagati yibikoresho bibiri bidasa ni ahantu hihariye hashobora kubaho ibyago byinshi aho kugabanuka kugabanuka bigatera kubura gufatira.Kubwibyo, ubushobozi bwa firime ya latex yo gukiza kugabanuka kugabanuka bigira uruhare runini mugufata tile.
Muri icyo gihe, ifu ya polymer isubirwamo irimo Ethylene ifite imbaraga nyinshi zifatika kungingo ngengabuzima, cyane cyane ibikoresho bisa, nka polyvinyl chloride na polystirene.Urugero rwiza rwa
Igihe cyo kohereza: Ukwakira-31-2022