Ifu ya polymer itatanye hamwe nindi miti idahwitse (nka sima, lime yamenetse, gypsumu, ibumba, nibindi) hamwe nibintu bitandukanye, ibyuzuza nibindi byongeweho [nka hydroxypropyl methylcellulose, polysaccharide (krahisi ether), fibre fibre, nibindi] bivangwa mumubiri. 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 nuburyo butandukanye bwubwubatsi: isano ya poro ya latex kumazi iyo yongeye gusubirwamo, ubukana butandukanye bwifu ya latx nyuma yo gutatanya, ingaruka kumyuka yumwuka wa minisiteri no gukwirakwiza ibibyimba byinshi, Imikoranire hagati yifu ya rubber nibindi byongerera imbaraga ifu ya latx, hamwe no kongera ifu ya latex, ifasha kwiyongera kwinshi,
Muri rusange abantu bemeza ko uburyo bukoreshwa bwa porojeri ya latx ituma imikorere ya minisiteri nshya ari uko ifu ya latex, cyane cyane colloid ikingira, ifitanye isano n’amazi iyo itatanye, ibyo bikaba byongera ubwiza bwikibabi kandi bikanoza ubumwe bwa minisiteri yubwubatsi.
Nyuma yubutaka bushya burimo 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 byegereza buhoro buhoro, intera igenda ihura buhoro buhoro, hamwe na resin buhoro buhoro. 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 bigatuma bahurira hamwe, hanyuma amazi asigaye yuzuza imyenge, hanyuma firime ikorwa 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 izaterwa na alkali iterwa na hydrata ya sima, kandi adsorption yibikoresho bya quartz bizatandukanya buhoro buhoro inzoga za polyvinyl na sisitemu, nta hydrophilique irinda hydrophilique. , Firime yakozwe mugukwirakwiza ifu ya latx idasubirwaho, idashobora gushonga mumazi, ntishobora gukora mubihe byumye gusa, ahubwo no mubihe byigihe kirekire byo kwibiza mumazi. Birumvikana ko muri sisitemu itari alkaline, nka gypsumu cyangwa sisitemu ifite ibyuzuye gusa, kubera ko inzoga za polyvinyl zikiriho igice muri firime yanyuma ya polymer, igira ingaruka ku kurwanya amazi ya firime, mugihe ubwo buryo budakoreshwa mukwibiza mumazi maremare, kandi polymer iracyafite imiterere yubukanishi, ifu ya polymer ikwirakwizwa 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. urusobe rworoshye. Imbaraga zingana hamwe no guhuza firime ya polymer resin yakozwe nifu ya latex irazamurwa. Bitewe nubworoherane bwa polymer, ubushobozi bwo guhindura ibintu burenze kure imiterere itajegajega yamabuye ya sima, imikorere ya deforme ya minisiteri iratera imbere, kandi ingaruka zo gukwirakwiza stress 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 cy’ibicuruzwa biva mu mahanga, minisiteri izahinduka mu buryo bwujuje ubuziranenge kandi ihinduka elastomer, kandi ibicuruzwa biva mu mazi bya sima bizahinduka “uwuzuza” “. shiraho igice cyurukuta rwa pore, bityo ushireho imiterere yimiterere ya minisiteri. latex membrane ifite uburyo bwo kurambura ubwonko bukoresha impagarara zometse kuri marimari. 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