Kutulutsa ufa wa polmer ndi zomatira zina zofanana (monga sime, diimu, gypsum, dongo, etherc osakanikirana kuti apange matope osakanikirana. Pamene matope a ufa amawonjezeredwa ku madzi ndikulimbikitsidwa, pansi pa zochita za hydrophilic molimbika, zomwe zimakhala zokwanira kupanga filimu yotsitsiridwa bwino. Kupanga kwa mphira wa mphira ndi kosiyana, komwe kumakhudza phokoso la matope ndi zomangamanga: Kukhazikika kwa ufa wa latex mutabala, zotsatira za Mpweya womwe umapezeka ndi matope ndi kugawa kwa thovu, kulumikizana pakati pa ufa wa mphira ndi zowonjezera zina kumapangitsa kuti mitundu yosiyanasiyana ya latex ikhale ndi ntchito, ndikuwonjezera mamasukidwe.
Nthawi zambiri amakhulupirira kuti makina omwe amakonzedwanso ndi ufa wa matope mwatsopano ndikuti ufa wa latedx, makamaka woteteza madzi akamabalalika, zomwe zimawonjezera mafashoni a matope.
Pambuyo pa matope atsopano omwe ali ndi mwayi wopezeka wa latex ufa wopangidwa, ndikuyamwa madzi pamtunda, madzi pang'onopang'ono amachepetsa, madzi amatsika pang'onopang'ono , ndipo otumphukira pang'ono amafananira wina ndi mnzake. pamapeto pake mufilimu. Njira ya mafayilo a polymer imagawidwa magawo atatu. Mu gawo loyamba, tinthu tating'onoting'ono timasunthira momasuka mu mawonekedwe a brownian kuyenda koyambirira. Madzi amatuluka, kusuntha kwa tinthuko kumakhala kokha komanso kokhazikika, komanso zovuta zam'madzi pakati pa madzi ndipo mpweya zimawapangitsa kuti azitsatira pang'onopang'ono. Mu gawo lachiwiri, tinthu tating'onoting'ono titayamba kulumikizana, madzi omwe ali pawiya amatuluka pamtunda wa mapepalawo amasulidwa pamalo a tinthu omwe amapangitsa kuti kusokonezedwe kwa zinthuzo kuti ziwathandizenso, ndipo Madzi otsalawo amadzaza ma pores, ndipo filimuyo imapangidwa mwamphamvu. Gawo lachitatu ndi lomaliza limapangitsa kusiyanasiyana (nthawi zina kumatchedwa kuti kudzitsatira) kwa mamolekyulu a polymer kuti apange filimu yopitilira. Mukamapanga makanema, tinthu tating'onoting'ono tating'ono tinthu tating'onoting'ono tomwe timaphatikizidwa ndi gawo latsopano lowonda lili ndi nkhawa kwambiri. Mwachidziwikire, kuti amwambo omwazikulu kuti athe kupanga kanema mu matope, filimu yotsika yopanga kutentha (Mft) iyenera kutsimikiziridwa kukhala yotsika kuposa kutentha kwa matope.
Ma Colloids - mowa wa polyvinyl uyenera kulekanitsidwa ndi dongosolo la ma polimane. Uwu si vuto mu matope a alkaline a alkaline, chifukwa chakumwa cha polyvinyl chidzapangidwa ndi simenti, ndipo adsorption wa zinthu za quartz pang'onopang'ono amalekanitsa mowa, popanda kuteteza cololoid colloid . , Kanemayo adapanga chifukwa chofalitsa ufa wokwezedwa wa latx, womwe ndi wopanda madzi, sungathe kugwira ntchito mu nyengo zowuma, komanso m'madzi nthawi yayitali. Zachidziwikire, m'magulu omwe sakhala alkaline, monga gypsum kapena machitidwe a gypsum kapena machitidwe omwe amakhala ndi mafilimu okwanira Kumizidwa, ndipo polymer akadali ndi mawonekedwe ake, osamwa polima ufa akhoza kugwiritsidwabe ntchito m'njira izi.
Ndi mapangidwe omaliza a filimu ya Polymer, dongosolo lopangidwa ndi avoric ndi okhazikika limapangidwa m'matope, kuti, mafupa owoneka bwino ndi duwa lopangidwa ndi ufa wopangidwa mu kusiyana komanso malo olimba. network yosinthika. Mphamvu yamphamvu ndi coutheon of the Polymer Remen yopangidwa ndi ufa wa latx imakulitsidwa. Chifukwa cha kusinthasintha kwa polymer, kusokoneza kotereku ndikokwera kwambiri kuposa momwe matope a simenti amalimbikitsidwa, ndipo zotsatira zofatsa zimayenda bwino, potengera kukana kwa matope .
Ndi kuwonjezeka kwa zomwe zimapezeka pakumwa polima, dongosolo lonse limayamba kulowera pulasitiki. Pankhani yokhudza ufa wa latx, gawo la polymer mu matonthoti lomwe limachirikiza limaposa gawo lazomwe limachiritsa limadutsa pang'onopang'ono, matopewo asintha ndikusanduka elastomer, ndipo kupangidwa kwa simenti "kudzachita" zosefukira ". Mphamvu ya anthu, yotupa, kusinthasintha ndi kusindikiza kwa matope kwa matope osinthika polima polima. Kuphatikiza kwa ufa wofatsa polima kumapereka filimu ya polymer (filimu ya latedx) kuti mupange ndi kupanga gawo la makoma a phula, potero akusindikiza kapangidwe ka matope. Membrane wa latx ali ndi njira yodzitayirira yomwe imagwiritsa ntchito kusokonezeka kwa chiwopsezo chake ndi matope. Kudzera mu mphamvu zamkati, matope amachitika lonse, potero ndikuwonjezera mphamvu ya matongu. Kukhalapo kwa osinthika kwambiri komanso owoneka bwino kwambiri kumathandizira kusintha matope ndi kututa kwa matope. Limagwirira ku kuchuluka kwa zipatso ndi kulephera mphamvu ndi izi: Ngati mphamvu imayikidwa, microcracks imachedwa chifukwa cha kusinthaku ndikusintha mpaka mavuto atafika. Kuphatikiza apo, madera omwe aphatikizidwa a polymon amalepheretsanso kuphatikiza ma microcracks omwe akudutsa. Chifukwa chake, kufalikira kwa polima polima kumawonjezera nkhawa komanso kulephera kwa zinthuzo.
Kanema wa Polymer mu matope osinthika ali ndi chofunikira kwambiri pakulimbana kwa matope. Ufa wokwezeka polimaga wogawika pamlingowo umagwiranso ntchito inayake atamwazidwa ndikupangidwa mu filimu, yomwe ikuwonjezera chotsatsa ku zida zokhudzana ndi zomwe akumana nazo. Mu micrestructuction malo omwe ali pakati pa ufa wa ufa wolumikizidwa ndi matope ndi matanthwe, filimuyo imapanga matope a ceramited matrix. Malo omwe ali pakati pa zinthu ziwiri zopanda chinyengo ndi malo apadera omwe amakhala pachiwopsezo chomwe ming'alu yovuta imakhala ndikutsogolera kuwonongeka. Chifukwa chake, kuthekera kwa mafilimu a Latx kuti muchiritse miseche yovuta kumathandiza gawo lofunikira m'masamba a tiles.
Nthawi yomweyo, kufalikira kwa polima polima komwe kuli ndi ethylene kuli ndi zotsatsa zambiri kwa orthec magawo, makamaka zinthu zofananira, monga polyvinyl chloride ndi polystyrene. Chitsanzo chabwino cha
Post Nthawi: Oct-31-2022