Kukho iintlobo ezimbini zeeresini ezisetyenziselwa ukuvelisa ii-composites: i-thermoset kunye ne-thermoplastic. Ii-thermoset resins zezona zixhaphakileyo, kodwa ii-thermoplastic resins ziyafumana umdla omtsha ngenxa yokusetyenziswa okukhulayo kwee-composites.
Iiresini zeThermoset ziyaqina ngenxa yenkqubo yokuzilungisa, esebenzisa ubushushu ukwenza iipolymers ezidityaniswe kakhulu ezineebhondi eziqinileyo ezinganyibilikiyo okanye ezinganyibilikiyo ezinganyibilikiyo xa zifudunyezwa. Iiresini zeThermoplastic, kwelinye icala, ngamasebe okanye imixokelelwane yeemonomers ezithamba xa zifudunyezwa kwaye ziqine xa sele zipholile, inkqubo eguqukayo engadingi kudityaniswa kweekhemikhali. Ngamafutshane, unganyibilikisa kwakhona kwaye ulungise iiresini zeThermoplastic, kodwa kungekhona iiresini zeThermoset.
Umdla kwi-thermoplastic composites uyanda, ingakumbi kwishishini leemoto.
Iingenelo zeThermosetting Resins
Ii-resin ze-thermoset ezifana ne-epoxy okanye i-polyester ziyathandwa kakhulu kwimveliso ye-composite ngenxa yokuba zincinci kakhulu kwaye zingena kakuhle kwinethiwekhi ye-fiber. Ngoko ke kunokwenzeka ukusebenzisa ii-fibers ezininzi kunye nokwandisa amandla ezinto ezigqityiweyo ze-composite.
Isizukulwana samva nje seenqwelo-moya sidla ngokuquka izinto ezidityanisiweyo ezingaphezu kwama-50 ekhulwini.
Ngexesha le-pultrusion, iifayibha zifakwa kwi-thermoset resin zize zifakwe kwi-mold eshushu. Olu sebenzi luvuselela i-curing reaction eguqula i-low-molecular-weight resin ibe yi-solid three-dimensional network structure apho iifayibha zivalelwe kule network intsha. Ekubeni uninzi lwee-curing reactions ziyi-exothermic, ezi reactions ziyaqhubeka njengee-chain, zivumela ukuveliswa okukhulu. Nje ukuba i-resin ihlale, isakhiwo esine-three-dimensional sivala iifayibha endaweni yaso kwaye sinike amandla kunye nokuqina kwi-composite.
Ixesha lokuthumela: Okthobha-19-2022
