Sekhomaretsi sa lithaele le liforomo tsa putty ke lihlahisoa tse tlamehang ho ba le indastering ea kaho. Li sebelisetsoa ho kopanya lithaele tsa ceramic libakeng tse sa tšoaneng, ho akarelletsa le marako le fatše. Karolo ea bohlokoa ea lihlahisoa tsena ke polymer ea RDP. RDP e emetse Redispersible Polymer Powder, e leng copolymer ea vinyl acetate le ethylene. Li-polymers li bapala karolo ea bohlokoa mekhoeng ea likhomaretsi le li-putty mme li susumetsa mefuta e fapaneng ea thepa, ho kenyeletsoa ho khomarela, ho kopanya, ho tšoarella le ho sebetsa. Sengoliloeng sena se tla tšohla lintlha tse lokelang ho nahanoa ha u khetha polymer e nepahetseng ea RDP le phello ea eona ho sekhomaretsi sa lithaele le li-putty formulations.
1. Ho khomarela
Ho khomarela ke bokhoni ba sehlahisoa ho khomarela libaka tse fapaneng. Thepa ea sekhomaretsi ea li-polymers tsa RDP e itšetlehile ka sebopeho sa lik'hemik'hale, boima ba limolek'hule le tekanyo ea ho hokahanya ha polymer. Sebopeho sa lik'hemik'hale sa RDP polymer se etsa qeto ea hore na ke mefuta efe ea libaka tseo e lumellanang le tsona. Ka mohlala, karolo ea vinyl acetate ea polymer e na le sekhomaretsi se phahameng ho libaka tse se nang polar tse kang PVC le PE. Ka lehlakoreng le leng, ethylene e na le sekhomaretsi se phahameng ho libaka tsa polar tse kang konkreite le lehong.
Ho finyella ho khomarela ka matla, ho kgothaletswa ho sebelisa li-polymers tsa RDP tse boima ba molek'hule. Li-polymers tse phahameng tsa boima ba limolek'hule li theha matla a matla a li-intermolecular, a fella ka ho khomarela hamolemo. Tekanyo ea li-cross-link e ama ho qhibiliha ha polymer ea RDP 'me kahoo thepa ea eona ea ho khomarela. Li-polymers tse hokahaneng haholo ha li qhibilihe haholo 'me li na le thepa ea sekhomaretsi e tlase ho feta li-polymer tse amanang le sefapano.
2. Momahano
Momahano o bolela bokgoni ba sehlahiswa ho ikgomarela. Thepa e kopanetsoeng ea li-polymers tsa RDP e amana le mocheso oa phetoho ea khalase (Tg) ea polymer. Tg ea polima ea RDP e etsa qeto ea mocheso oo polymer e fetohang ho tloha ho rabara ho ea boemong ba khalase. Li-polymers tse nang le Tg ka holimo ho mocheso oa kamore li bonts'a momahano o motle, ha li-polymers tse nang le Tg ka tlase ho mocheso oa kamore li bonts'a bonngoe bo fokolang.
Bakeng sa momahano o motle, ho khothaletsoa ho sebelisa lipolyme tsa RDP tse nang le Tg e kaholimo ho mocheso oa kamore. Li-polymers tse phahameng tsa Tg li hlahisa matla a matla a li-intermolecular, e leng se etsang hore ho be le bonngoe bo betere. Ho boetse ho khothaletsoa ho sebelisa li-polymers tsa RDP tse boima ba molek'hule ho matlafatsa momahano.
3. Ho tšoarella
Ho tšoarella ke thepa ea bohlokoa ea sekhomaretsi sa lithaele le li-putty formulations. Ho tšoarella ha li-polymers tsa RDP ho angoa ke ho hanyetsa ha tsona metsi, mocheso le ho senyeha ha UV. Karolo ea vinyl acetate ea RDP polymer e na le kutloelo-bohloko ho hydrolysis, e bakang ho fokotseha ho tšoarellang maemong a mongobo.
Bakeng sa ho tšoarella ho matlafalitsoeng, ho khothaletsoa ho sebelisa lipolymer tsa RDP tse nang le ethylene e ngata. Vinyl e na le thepa e ntle ea ho hanyetsa metsi le mongobo mme ka hona e tšoarella hamolemo. Li-polymers tsa RDP tse nang le litaba tse tlase tsa vinyl acetate le tsona li bonts'a nako e telele. Ntle le moo, li-polymers tsa RDP tse nang le khanyetso e ntle ea UV lia khothaletsoa bakeng sa lits'ebetso tsa kantle.
4. Ts'ebetso ea ts'ebetso
Ho sebetsa ho bolela boiketlo ba tšebeliso ea sekhomaretsi sa lithaele le liforomo tsa putty. Ts'ebetso ea li-polymers tsa RDP e angoa ke boholo ba tsona, bongata ba tsona, le ho hasana. Li-polymers tse nyane tsa RDP li bonts'a ts'ebetso e ntle haholo hobane li hasana ka potlako metsing, 'me li baka motsoako o boreleli oa sekhomaretsi kapa putty. Ho feta moo, lipolymer tsa RDP tse nang le li-densities tse ngata tse tlase li bonts'a ts'ebetso e ntle haholo kaha li hloka boiteko bo fokolang ba ho kopanya.
Ho ntlafatsa ts'ebetso, ho khothaletsoa ho sebelisa li-polymers tsa RDP tse nang le boholo bo nyane le bongata bo tlase ba bongata. Ho feta moo, ho khothaletsoa ho sebelisa li-polymers tsa RDP tse nang le dispersibility tse ngata metsing ho fihlela phallo e potlakileng le metsoako e bonolo.
ha re phethela
Ho khetha polymer e nepahetseng ea RDP bakeng sa sekhomaretsi sa lithaele le li-putty formulations ho bohlokoa ho fihlela boleng bo holimo ba sehlahisoa. Ho khomarela, ho kopana, ho tšoarella le ho sebetsa ha polymer ho ama ts'ebetso ea sehlahisoa. Lintlha tse lokelang ho nahanoa ha u khetha polymer e loketseng ea RDP e kenyelletsa sebopeho sa eona sa lik'hemik'hale, boima ba limolek'hule, tekanyo ea ho hokahanya, mocheso oa phetoho ea khalase, ho hanyetsa metsi, mocheso le ho senyeha ha UV, boholo ba likaroloana, bongata ba bongata le ho hasana. Ho nahanisisa ka lintlha tsena ka hloko ho ka lebisa khethong e nepahetseng ea polima ea RDP le lithaelese tse betere tsa sekhomaretsi le li-putty formulations.
Nako ea poso: Oct-07-2023