Tulaga Sili Suavai Unsaturated Polyester Resin mo Fiberglass
"Polyester" o se vasega o polymer tuufaatasiga o loʻo i ai faʻamau ester e iloga mai resins e pei ole phenolic ma epoxy resins. O lenei polymer compound e gaosia e le polycondensation reaction i le va o le dibasic acid ma le dibasic alcohol, ma pe a o'o i lenei polymer compound o loʻo i ai se faʻamaufaʻalua e le tuʻu, e taʻua o le polyester unsaturated, ma o lenei polyester unsaturated e faʻamavaeina i totonu o se monomer e iai le malosi e mafai ai ona polymerised ( masani styrene).
O lenei polyester e le'o tumu e fa'afefeteina i totonu o se monomer (masani styrene) e i ai le malosi e polymerise, ma a avea ma vai viscous, e ta'ua o le unsaturated polyester resin (Unsaturated Polyester Resin po'o le UPR mo le pupuu).
E mafai la ona faauigaina le resini polyester unsaturated o se vai viscous e faia e le polycondensation o se dibasic acid ma le ava dibasic o loʻo i ai le unsaturated dibasic acid poʻo le dibasic alcohol i totonu o le linear polymer compound ua solo i totonu o se monomer (masani styrene). O resini polyester e le'o tumu, lea e maua ai le 75 pasene o resini tatou te fa'aaogaina i aso uma.