Ikhwalithi ephezulu ye-Liquid Unsaturated Polyester Resin ye-Fiberglass
"I-Polyester" ikilasi lezinhlanganisela ze-polymer eziqukethe amabhondi e-ester ahlukaniswa nezinsalela ezifana ne-phenolic ne-epoxy resins. Le nhlanganisela ye-polymer ikhiqizwa ukusabela kwe-polycondensation phakathi kwe-dibasic acid ne-dibasic alcohol, futhi uma le nhlanganisela ye-polymer iqukethe i-unsaturated double bond, ibizwa ngokuthi i-unsaturated polyester, futhi le polyester engasetshenzisiwe ichithwa ku-monomer enamandla okwenza i-polymerised ( ngokuvamile styrene).
Le polyester engagcwalisiwe incibilika ku-monomer (imvamisa i-styrene) enekhono lokupholisa, futhi uma iba uketshezi lwe-viscous, ibizwa nge-unsaturated polyester resin (i-Unsaturated Polyester Resin noma i-UPR ngamafuphi).
Ngakho-ke i-polyester resin engahlanjululwa ingachazwa njengoketshezi lwe-viscous olwakhiwe i-polycondensation ye-dibasic acid ene-dibasic alcohol equkethe i-unsaturated dibasic acid noma i-dibasic alcohol ku-linear polymer compound encibilike ku-monomer (imvamisa i-styrene). Izinsalela ze-polyester ezingafakwanga, ezakha amaphesenti angama-75 ezinsalela esizisebenzisa nsuku zonke.