I-Polyols ibhekiseleka ngokuphambili kusebenziso lwe-Polyurethane. Iminyango emangeni leminyango yasemthethweni yiye kusebenzisa ukusetshenziswa kwebutheku enkulu ekuphakanyisweni kweentsha ezininzi, phakathi kweefurniture kunye neetoyizana. Bayendlala kwindawo eyingekiweyo, ngoba angaba ngaphandle komsebenzi okanye ongavalue ngenxa yokuba ayiphi polyols.
I-Polyurethanes zikhethelelwa nge-Polyols. The polyol kunye no-isocyanate zizifuzwe kwiqela lemfanekiso osebenziswayo ukubaqhuka amandla ehlangene neziqinisekiso ze-polyurethanes. Ngokushesha lokusebenza, izipolyolizi zinokulayishwa ukuba amapolyurethane angazibekisa okanye ngazibekisa, ngaphandle kokugcina okanye kunqamulelana. Le nto yokubuyisela kumntu nokuba yintoni iprofayile yakhe yayaziya kuya kuhlangene nemisebenzi akho kube ngenxa polyurethanes zizifuneka kakhulu nokuba zikhona kwindawo ezininzi. Isinye sokuqala sesipolyurethane esibekisayo se-SANYING sizityelelwa ukuze isetyenziswa ngokuphakama, xa kulayishwa ngokwesobizo esingabekisiyo asetyenziswa ukuze isetyenziswa ngokuphakama.
Kwi-SANYING i-Polyols ziyavakasha amandla angamandla ezaziwa njenge-hydroxyl amagroup. Izigaba ezifana nje lapho zikhuphela ngokubanzi ngazo nezinye izichemikali, njengene-isocyanates, ukwenzela i-polyurethanes. Ngoku kakhulu polyol isocyanate bazichemikali babalulekile bahlala phakathi pakade bakufuneka bayivale ngendawo engcono lokusebenza olungabulawa ngu-polyurethanes. Abafundisi bazibhekiselela umoya wokusebenzela we-polyurethanes wokuthi khethwe inani elithile le-polyol. Ukuthi okonke abaningi azifake ukuze akhethwe yinto eyayixhasa kunye nokukhathaleka.
Izigradi ezininzi ezifanekiso kwezintathu le polyethers zinokuyenza polyurethanes. I-SANYING Polyester kunye ne-polyether polyols kunye ne-polycarbonate polyols zizikhoyo esezenzakalelayo. Izitypo ezidingeki le polyol zizicacile izinto ezithunyelwe, futhi zibonisa uphawu kunye nokulandelana kwesiphumo esilayishwa. I-Polyester polyols, ngokuvamile, zisetyenziswa ukwenzela amaxesha, kunye nokusetshentela ukubona ngeendlela ezilandelayo. ipholimeri mdi ngokusebenza kwezimali zakhezo, umcaba wakhiwo osetyenziswa ungavumelana nesi-siko sokugcinwa sokuqala sokuphawula okudingeka kunye nokufaka umbuso wesiphi lesi-siko sokuphawula we-polyurethane.
Izixhobo ezifanekiso zazokwenzakalisa ngokusebenziswa kwezindlu zepolyol. Izipolioli zidinga ukuthi ukuhlawulula, ukusetyenziswa kunye nekuflexibility kwepoliyurithane. Iziprodyekti ezinikezela ngepolyols zibonisa ukukhona kweendlela nokuphuma emuva komnyaka wokuqala. Zizoba kuqonda ukuba izipoliyurithane zingene ukubuyiselwa kuhluke nokuhlola nokuziphatha. Lokunye lokungcono yinto yokuba zikhona ezintsha okanye ezinamandla ukuya kwiindlela yokugcina okanye ezincedisiyo. Ukuba amaxhobo akhona apha apho azisebenzisayo kwiindlela yokugcina okanye ezincedisiyo ngokusho nokuba zikhona ezintsha okanye ezinamandla ukuya kwiindlela yokugcina okanye ezincedisiyo.
Ngoku lokugqibela abantu ngokuthi bayenza isenzo esethweni lokusemthethweni, amakhiqizeli acacile amagama-ekhangelene-nomsebenzi wesintu. Ungayithemba nge-polyols ehlukene ngezilimo ezinikeziswa elula emahlweni. Ukuthi yilapho angabonakali kuhlukelelwa ngokubona ukuba ayiqhelekanga izinto zethuluzwe. Ukhetho olunye ulula polyols ezisebenziswayo, olandelayo alandelayo kulandelwe kwiimbali ethathweni ezikhoyo ezilandelayo. Izinkinga ezisekelweyo lapho kuhlukelelwa ngokuyimfihloko wamakhiqizeli ukuvumelanisa umthwalo nokufaka ukusetyenziswa kwesintu, ngokuhlala kakhulu kwenzelela imibiko engaphezulu.
