Utomoni Wapamwamba Kwambiri wa Polyester Wopanda Madzi wa Fiberglass
"Polyester" ndi gulu la mankhwala a polima okhala ndi ma ester bond omwe amasiyanitsidwa ndi ma resin monga phenolic ndi epoxy resins. Mankhwala a polima awa amapangidwa ndi polycondensation reaction pakati pa dibasic acid ndi dibasic alcohol, ndipo pamene mankhwala a polima awa ali ndi unsaturated double bond, amatchedwa unsaturated polyester, ndipo unsaturated polyester iyi imasungunuka mu monomer yomwe imatha kupangidwa polymerized (nthawi zambiri styrene).
Polyester yosakhuthala iyi imasungunuka mu monomer (nthawi zambiri styrene) yomwe imatha kusungunuka, ndipo ikasanduka madzi okhuthala, imatchedwa unsaturated polyester resin (Unsaturated Polyester Resin kapena UPR mwachidule).
Chifukwa chake, utomoni wa polyester wosaturated ukhoza kutanthauzidwa ngati madzi okhuthala opangidwa ndi polycondensation ya dibasic acid yokhala ndi dibasic alcohol yokhala ndi unsaturated dibasic acid kapena dibasic alcohol mu linear polymer compound yosungunuka mu monomer (nthawi zambiri styrene). Unsaturated polyester resins, zomwe zimapanga 75 peresenti ya utomoni womwe timagwiritsa ntchito tsiku lililonse.













