Ubudlelwane be-latex powder emanzini xa iphinde yachithwa, i-viscosities eyahlukeneyo ye-latex powder emva kokusasazeka, impembelelo kumxholo womoya wodaka kunye nokusabalalisa amaqamza omoya, intsebenziswano phakathi komgubo werabha kunye nezinye izongezo, njl. I-latex powders inyuse ukumanzi., Ukwandisa i-thixotropy, ukwandisa i-viscosity kunye nokunye.
Ukuphucula ukusebenza
Ngokuqhelekileyo kukholelwa ukuba i-latex powder ehlaziywayo iphucula ukusebenza kodaka olutsha: i-latex powder, ngokukodwa i-colloid ekhuselayo, inobudlelwane bamanzi kwaye yandisa i-viscosity ye-slurry kwaye iphucula ukuhambelana kodaka lokwakha.Emva kokuba udaka olutsha oluxubeneyo oluqulethe i-latex powder dispersion yenziwe, kunye nokufunxwa kwamanzi ngumgangatho wesiseko, ukusetyenziswa kwe-hydration reaction, kunye nokunyuka emoyeni, amanzi aya kuncipha ngokuthe ngcembe, amasuntswana aya kusondela ngokuthe ngcembe, ujongano kancinci kancinci ziye zibe mfiliba, kwaye ngokuthe ngcembe ziya kudibana enye kwenye kwaye ekugqibeleni zihlangane.ukwenziwa kwefilimu.Inkqubo yokwenziwa kwefilimu ye-polymer ihlukaniswe ngamanqanaba amathathu.Kwinqanaba lokuqala, iinqununu ze-polymer zihamba ngokukhululekile ngendlela ye-Brownian motion kwi-emulsion yokuqala.Njengoko amanzi ephuma ngumphunga, ukuhamba kwamasuntswana ngokwendalo kuthintelwe ngakumbi nangakumbi, kwaye ukuxinana kobuso phakathi kwamanzi nomoya kuyawanyanzela ukuba ahambelane ngokuthe ngcembe.Kwinqanaba lesibini, xa amasuntswana eqala ukudibana, amanzi akuthungelwano ayaphuphuma kwi-capillary, kwaye uxinzelelo oluphezulu lwe-capillary olusetyenziswa kumphezulu wamasuntswana lubangela ukuba i-deformation ye-latex spheres idibanise, kwaye amanzi asele azalise iipores, kwaye ifilimu yenziwe ngokufanelekileyo.Inqanaba lesithathu, lokugqibela livumela ukusasazwa (ngamanye amaxesha kubizwa ngokuba yi-self-adhesion) yeemolekyuli ze-polymer ukuba zenze ifilimu yokwenene eqhubekayo.Ngexesha lokwenziwa kwefilimu, amasuntswana e-latex ahlala eyedwa adityaniswa abe sisigaba esitsha sefilimu enoxinzelelo oluphezulu.Ngokucacileyo, ukwenzela ukuba i-latex powder ikwazi ukuphinda ikwazi ukwenza ifilimu kwi-mortar lukhuni, kuyimfuneko ukuqinisekisa ukuba iqondo lokushisa elincinci lokubumba ifilimu (MFT) lingaphantsi kweqondo lokushisa lokunyanga lodaka.
Ukwandisa uxinzelelo lwezinto eziphathekayo
Ngokuqulunqwa kokugqibela kwefilimu yepolymer, inkqubo ebandakanya izakhiwo ze-inorganic kunye ne-organic binder, oko kukuthi, i-skeleton e-brittle kunye neqinile eyenziwe ngezinto ze-hydraulic, kunye nefilimu eyenziwe ngumgubo we-latex odispersible kwizithuba kunye neendawo eziqinileyo zenziwa kwindawo. udaka olunyangisiweyo.inethiwekhi ebhetyebhetye.Amandla okuqina kunye nokubambisana kwefilimu ye-polymer resin eyenziwe ngumgubo we-latex iphuculwe.Ngenxa yokuguquguquka kwepolymer, isakhono sokuguqulwa siphezulu kakhulu kunokwakheka kwelitye le-samente, ukusebenza kwe-deformation yodaka kuphuculwe, kwaye umphumo wokusabalalisa uxinzelelo uphuculwe kakhulu, ngaloo ndlela kuphuculwe ukuxhathisa kokuqhekeka kodaka. .Ngokunyuka komxholo we-latex powder ephindayo, yonke inkqubo iphuhlisa kwiplastiki.Kwimeko yomxholo ophezulu we-latex powder, isigaba se-polymer kumdaka ophilisiweyo ngokuthe ngcembe udlula isigaba semveliso ye-inorganic hydration, kwaye udaka luya kutshintsha umgangatho kwaye lube yi-elastomer, ngelixa imveliso ye-hydration ye-samente iba "i-filler".“.Amandla anqabileyo, u-elasticity, ukuguquguquka kunye nokutywinwa kodaka oluguqulwe ngumgubo we-latex ophindwe kabini zonke ziphuculwe.Ukudityaniswa komgubo we-latex ophinda uhlawulwe kuvumela ifilimu ye-polymer (ifilimu ye-latex) ukuba yenze kwaye yenze inxalenye yodonga lwe-pore, ngaloo ndlela itywina isakhiwo esiphezulu se-porosity yodaka.I-latex inwebu inomatshini wokuzolula okhupha uxinzelelo apho ibotshelelwe kudaka.Ngala mandla angaphakathi, udaka lugcinwa lulonke, ngaloo ndlela lukhulisa amandla adibeneyo odaka.Ubukho beepolymers eziguquguqukayo kakhulu kunye ne-elastic elasticity kuphucula ukuguquguquka kunye nokunwebeka kodaka.Indlela yokunyuka koxinzelelo lwesivuno kunye namandla angaphumeleli ngolu hlobo lulandelayo: xa i-force isetyenziswa, i-microcracks ilibazisekile kuze kube yilapho uxinzelelo oluphezulu lufikelelwa ngenxa yokuphucula ukuguquguquka kunye nokuqina.Ukongeza, imimandla yepolymer ephothiweyo iphinda ithintele ukudityaniswa kwee-microcracks kwiintanda ezigqobhozayo.Ngoko ke, i-polymer powder ehlaziywayo iphucula uxinzelelo lokungaphumeleli kunye nokungaphumeleli kwezinto eziphathekayo.
Ixesha lokuposa: Mar-09-2023