EPS granular yumuriro wa minisiteri ni ibikoresho byoroheje byokoresha ubushyuhe bwumuriro bivanze nububiko bwa organic organique, bindic organic, imvange, inyongeramusaruro hamwe nurumuri rwinshi muburyo runaka. Muri EPS granular yumuriro wa minisiteri yubushakashatsi kuri ubu ikorerwa ubushakashatsi no kuyishyira mu bikorwa, irashobora gutunganywa Ifu ya Disxeded latex ifite uruhare runini mu mikorere ya minisiteri kandi ikagira uruhare runini mu biciro, bityo bikaba byibanze ku bantu. Imikorere yo guhuza ibice bya EPS ibice byimyororokere ya sisitemu yo hanze yinkuta ziva mububiko bwa polymer, kandi ibiyigize ahanini ni vinyl acetate / Ethylene copolymer. Ifu ya redispersible latex irashobora kuboneka mugutera spray yumye ubu bwoko bwa polymer emulsion. Bitewe no gutegura neza, ubwikorezi bworoshye no kubika byoroshye ifu ya latx idasubirwaho mubwubatsi, ifu idasanzwe ya latx yahindutse inzira yiterambere kubera imyiteguro yayo neza, ubwikorezi bworoshye nububiko bworoshye. Imikorere ya EPS ibice byokwirinda biterwa ahanini nubwoko nubunini bwa polymer yakoreshejwe. Ifu ya Ethylene-vinyl acetate latexr ifu (EVA) ifite Ethylene nyinshi hamwe na Tg (ubushyuhe bwikirahure bwikirahure) ifite imikorere myiza mubijyanye nimbaraga zingaruka, imbaraga zububiko hamwe no kurwanya amazi.
Gutezimbere ifu ya latex kumikorere ya minisiteri biterwa nuko ifu ya latex ari polymer ndende ya polymer hamwe nitsinda rya polar. Iyo ifu ya latex ivanze nuduce twa EPS, igice kitari polarike mumurongo wingenzi wa porojeri ya latx polymer kizaba umubiri wa adsorption uzaba hamwe nubuso butari inkingi ya EPS. Amatsinda ya polar muri polymer yerekejwe hanze hejuru yubuso bwa EPS, kuburyo ibice bya EPS bihinduka kuva hydrophobicity bikagera kuri hydrophilique. Bitewe no guhindura ubuso bwa EPS ukoresheje ifu ya latex, ikemura ikibazo ko uduce twa EPS dushobora guhura namazi byoroshye. Kureremba, ikibazo cyurwego runini rwa minisiteri. Muri iki gihe, iyo sima yongewemo ikavangwa, amatsinda ya polar yamamajwe hejuru yubutaka bwa EPS akorana nuduce twa sima kandi agahuza hafi, kuburyo imikorere ya minisiteri ya EPS itera imbere cyane. Ibi bigaragarira mubyukuri ibice bya EPS bihanagurwa byoroshye na sima paste, kandi imbaraga zihuza zombi zateye imbere cyane.
Emulsion na redispersible latex ifu irashobora gukora imbaraga zingirakamaro hamwe nimbaraga zo guhuza kubikoresho bitandukanye nyuma yo gukora firime, zikoreshwa nka binder ya kabiri muri minisiteri kugirango ihuze na sima ya sima, sima na polymer. imikorere ya minisiteri. Iyo witegereje microstructure yibikoresho bya polymer-sima yibikoresho, byizerwa ko kongeramo ifu ya latxersible redxersible ishobora gutuma polymer ikora firime kandi igahinduka igice cyurukuta rwumwobo, kandi igakora minisiteri yose ikoresheje imbaraga zimbere, itezimbere imbaraga zimbere za minisiteri. Imbaraga za polymer, bityo zitezimbere kunanirwa kwa minisiteri no kongera imbaraga zanyuma. Kugira ngo bige ku mikorere ndende y’ifu ya redxersible ifu ya minisiteri, byagaragaye na SEM ko nyuma yimyaka 10, microstructure ya polymer muri minisiteri idahindutse, ikomeza guhuza neza, imbaraga zihindagurika no kwikomeretsa hamwe n’amazi meza. Uburyo bwo gushiraho imbaraga zifata tile bwizwe ku ifu ya redispersible latex, kandi byagaragaye ko nyuma yuko polymer yumishijwe muri firime, firime ya polymer yakoze isano ihuza hagati ya minisiteri na tile kuruhande rumwe, no kuri kurundi ruhande, polymer muri minisiteri yongerera ikirere umwuka wa minisiteri kandi ikagira ingaruka kumiterere nubushuhe bwubuso, hanyuma mugihe mugihe cyo gushiraho polymer nayo igira ingaruka nziza mubikorwa bya hydrata no kugabanuka kwa sima muri binder, Ibi byose bizafasha kunoza imbaraga zubumwe.
Ongeramo ifu ya redxersible latex kuri minisiteri irashobora kunoza cyane imbaraga zo guhuza nibindi bikoresho, kubera ko ifu ya hydrophilique latex hamwe nicyiciro cyamazi cyo guhagarika sima yinjira mumyenge na capillaries ya matrix, hanyuma ifu ya latx ikinjira mumyenge na capillaries. . Filime y'imbere irakozwe kandi irashimangirwa neza hejuru yubutaka, bityo bigatuma imbaraga zifatika zihuza ibikoresho bya sima na substrate.
Igihe cyo kohereza: Werurwe-09-2023