Amafomula okunamathela kuthayela kanye ne-putty yimikhiqizo okufanele ibe nayo embonini yezokwakha. Zisetshenziselwa ukuhlanganisa amathayili e-ceramic ezindaweni ezihlukahlukene, kuhlanganise nezindonga naphansi. Ingxenye ebalulekile yale mikhiqizo i-RDP polymer. I-RDP imele i-Redispersible Polymer Powder, eyi-copolymer ye-vinyl acetate ne-ethylene. Ama-polymers adlala indima ebalulekile ekwakhekeni kokunamathelayo kanye ne-putty futhi anomthelela ezinhlobonhlobo zezakhiwo, okuhlanganisa ukunamathela, ukubumbana, ukuqina kanye nokucutshungulwa. Lesi sihloko sizodingida izici okufanele zicatshangelwe lapho kukhethwa i-polymer ye-RDP efanele kanye nomthelela wayo ekwakhekeni kwe-adhesive ne-putty.
1. Ukunamathela
Ukunamathela ikhono lomkhiqizo ukunamathela ezindaweni ezahlukene. Izakhiwo zokunamathela zama-polymers e-RDP zincike esakhiweni samakhemikhali, isisindo samangqamuzana nezinga lokuxhumanisa kwe-polymer. Isakhiwo samakhemikhali se-polymer ye-RDP sinquma izinhlobo zezindawo evumelana nazo. Isibonelo, ingxenye ye-vinyl acetate ye-polymer inokunamathela okuphezulu ezindaweni ezingezona ze-polar ezifana ne-PVC ne-PE. I-ethylene, ngakolunye uhlangothi, inokunamathela okuphezulu ezindaweni ezipholile ezifana nokhonkolo nokhuni.
Ukuze kuzuzwe ukunamathela okuqinile, kunconywa ukusebenzisa ama-polymers e-RDP aphezulu esisindo. Ama-polymers esisindo samangqamuzana aphezulu adala amandla aqinile e-intermolecular, okuholela ekunamatheleni okungcono. Izinga lokuxhumanisa lithinta ukunyibilika kwe-polymer ye-RDP futhi ngaleyo ndlela izici zayo zokunamathela. Ama-polymer axhumene kakhulu awancibiliki kalula futhi anezindawo zokunamathela eziphansi kunama-polymer axhumene kancane.
2. Ukubumbana
Ukubumbana kusho ikhono lomkhiqizo ukuthi unamathele kuwo. Izakhiwo ezihlangene zama-polymers e-RDP zihlobene nezinga lokushisa le-glass transition (Tg) le-polymer. I-Tg ye-polymer ye-RDP inquma izinga lokushisa lapho i-polymer ishintsha khona isuka ku-rubbery iye esimweni esiyingilazi. Ama-polymers ane-Tg ngaphezu kwezinga lokushisa legumbi abonisa ukuhlangana okuhle kakhulu, kuyilapho ama-polymer ane-Tg ngaphansi kwezinga lokushisa legumbi abonisa ukuhlangana okubi.
Ukuze uthole ukubumbana okuhle kakhulu, kunconywa ukusebenzisa ama-polymer e-RDP ane-Tg engaphezu kwezinga lokushisa legumbi. Ama-polymer e-Tg aphezulu athuthukisa amandla anamandla e-intermolecular, okuholela ekuhlanganeni okungcono. Kuyatuswa futhi ukusebenzisa ama-RDP polymers anesisindo esiphezulu se-molecular ukuze kuthuthukiswe ukuhlangana.
3. Ukuqina
Ukuqina kuyisici esibalulekile se-adhesive tile kanye ne-putty formulations. Ukuqina kwama-polymer e-RDP kuthintwa ukumelana kwawo namanzi, ukushisa kanye nokuwohloka kwe-UV. Ingxenye ye-vinyl acetate ye-RDP polymer iyazwela ku-hydrolysis, okuholela ekunciphiseni ukuqina kwezimo ezinomswakama.
Ukuqina okuthuthukisiwe, kunconywa ukusebenzisa ama-polymer e-RDP anokuqukethwe okuphezulu kwe-ethylene. I-Vinyl inezindawo ezinhle kakhulu zokumelana namanzi nomswakama ngakho-ke inokuqina okungcono. Ama-polymer e-RDP anokuqukethwe kwe-vinyl acetate ephansi nawo abonisa ukuqina okuphezulu. Ukwengeza, ama-polymer e-RDP anokumelana okuhle kwe-UV ayanconywa ezinhlelweni zokusebenza zangaphandle.
4. Ukucutshungulwa
Ukusebenza kubhekisela ekusetshenzisweni kalula kwe-adhesive tile kanye namafomula we-putty. Ukusetshenzwa kwama-polymer e-RDP kuthintwa usayizi wezinhlayiyana zawo, ukuminyana ngobuningi, nokuhlakazeka. Ama-polymers e-RDP asayizi wezinhlayiyana ezincane abonisa ukucutshungulwa okuhle kakhulu ngoba ahlakazeka ngokushesha emanzini, okuholela ekuhlanganiseni okunamathelayo okubushelelezi noma kwe-putty. Ngaphezu kwalokho, ama-polymer e-RDP anokuminyana kwenqwaba ephansi abonisa ukucutshungulwa okuhle kakhulu njengoba edinga umzamo omncane wokuxuba.
Ukuze kuthuthukiswe ukucutshungulwa, kunconywa ukusebenzisa ama-polymer e-RDP anosayizi wezinhlayiyana ezincane kanye nokuminyana kwenqwaba. Ukwengeza, kunconywa ukusebenzisa ama-polymer e-RDP ane-dispersibility ephezulu emanzini ukuze kuzuzwe ukuhlakazeka okusheshayo nezingxube ezibushelelezi.
Ekuphetheni
Ukukhetha i-polymer ye-RDP efanele yokunamathisela amathayela kanye nokwakheka kwe-putty kubalulekile ekuzuzeni ikhwalithi yomkhiqizo omuhle kakhulu. Ukunamathela, ukubumbana, ukuqina kanye nokucutshungulwa kwe-polymer kuthinta ukusebenza komkhiqizo. Izinto okufanele zicatshangelwe lapho kukhethwa i-polymer ye-RDP efanelekile zihlanganisa ukwakheka kwamakhemikhali ayo, isisindo samangqamuzana, izinga lokuxhumanisa, izinga lokushisa lokushintsha kwengilazi, ukumelana namanzi, ukushisa nokuwohloka kwe-UV, usayizi wezinhlayiyana, ukuminyana ngobuningi nokuhlakazeka. Ukucatshangelwa ngokucophelela kwalezi zici kungaholela ekukhethweni kwe-polymer ye-RDP engcono kanye nokwakheka kwamathayela okunamathelayo kanye ne-putty.
Isikhathi sokuthumela: Oct-07-2023