Ngenxa yokuba izixhobo zokuncedisa i-PVC zihambelana kakhulu ne-PVC kwaye zinesisindo esiphezulu se-molecular weight (malunga (malunga ne-1-2) × 105-2.5 × 106g / mol) kwaye akukho mgubo wokugquma, zixhomekeke ekushiseni nasekuxubeni ngexesha lokubumba. Baqala bathambe kwaye babophe ngokuqinileyo amasuntswana eresin ejikelezileyo. Ngokuxutywa kunye nokutshintshwa kobushushu, ukunyibilika (i-gel) kukhuthazwa. I-viscosity ye-melt ayinciphisi, okanye inyuse; Ngenxa yokubanjiswa kwamatyathanga eemolekyuli, ukuqina, amandla, kunye nokwandiswa kwePVC kuphuculwe.
Ukongeza, ngenxa yokuba iinxalenye ezihambelanayo kunye nezingahambelaniyo zePVC zenza izixhobo zokulungisa kunye nesiseko seqokobhe. Ngokubanzi, ayihambelani ne-PVC kwaye ngoko isebenza njenge-lubricant yangaphandle, kodwa ayifuni kwaye ifake izikali, ezinomphumo wokulibaziseka ekunyibilikeni. Ke ngoko, ngokusekwe kwezi mpawu zesicelo, izixhobo zokuncedisa kwi-PVC zinokuhlulwa zibe ngamacandelo amabini: jikelele kunye ne-lubricating. Umsebenzi wendalo yonke we-PVC wokuncedisa ukusetyenzwa kukunciphisa ubushushu obunyibilikayo, ukomeleza amandla e-thermal kunye nokufana, ukunciphisa ukuqhekeka okunyibilikayo, kunye nokubonelela nge-ductility enkulu. Le misebenzi ineenzuzo ezinkulu zokulungiswa kwePVC: ukunciphisa ubushushu obunyibilikayo kuthetha ukwandisa ixesha lokuzinza kwe-thermal, ukubonelela ngokhuseleko lokusetyenziswa kwezinto ezisetyenzisiweyo, kunye nokuvumela ukuqhutyelwa phambili; Ukuphuculwa kwamandla obushushu kunye nokunciphisa ukuphuka kwe-melt, oku kuthetha ukuba kunokunyusa isantya sokusebenza, ukukhawulezisa ukutsalwa, kunye nokuphucula umgangatho obonakalayo kunye nokubumba; Ukuphucula ukufana kokunyibilika, okunokunciphisa i-ripples yomhlaba kunye nokuncibilika kokuqhekeka kwezinto ezikhutshiweyo, ngaloo ndlela ukwandisa imveliso, ukuphucula i-ductility kunye ne-thermoformability.
Ixesha lokuposa: Sep-05-2024
