Iziqinisi ze-calcium zinc ezidityanisiweyo zenziwe ikakhulu ngesepha ye-stearic acid, kulandele isepha ye-lauric acid kunye nesepha ye-oleic acid. Le mveliso iphawulwa kukuthambisa okuhle kwaye ayithobi inqanaba lokuthamba kweemveliso ze-PVC eziqinileyo, nto leyo eyenza ukuba ifaneleke ukucutshungulwa kwemibhobho kunye neeprofayili ze-PVC eziqinileyo.
Iimveliso ezicutshungulwa kusetyenziswa iteknoloji ye-microemulsification ziyazoyisa iingxaki ezikhankanyiweyo ngaphambili. Abantu bagxila kwiinkalo ezimbini zokuphucula: ukuphucula umbala wokuqala, kongezwa isixa esaneleyo sesepha ye-zinc, kwaye kusetyenziswa ii-chelating agents ukwenza i-zinc chloride ingabi nabungozi. Oku kwaziwa ngokuba kukulungelelaniswa kwe-zinc ephezulu: ukunciphisa isixa sesepha ye-zinc eyongeziweyo ukuthintela ukutsha kwe-zinc, kunye nokusebenzisa izongezo ukutshintsha umbala wokuqala. Le ndlela yaziwa ngokuba kukulungelelaniswa kwe-zinc ephantsi. Ayisetyenziswa kakhulu kwiimveliso ezithambileyo kuphela, isiphumo sayo sozinzo lobushushu kunye nokucaca kwayo kuye kwaqatshelwa, kodwa ikwasetyenziswa ngempumelelo ekucutshungulweni kwemveliso eqinileyo. Ukuze kugcinwe umbala omncinci wokuqala kunye nokuthintela ukutsha kwe-zinc kwinkqubo ye-calcium/zinc
Ngokubanzi, iityuwa zelothe zinamathela kuphela kumphezulu weenxalenye zePVC, nto leyo esebenza njengesithintelo ekudibaneni kweenxalenye zePVC, ibambezela kakhulu ukwenziwa kweplastiki, inciphise ukungqubana phakathi kweenxalenye zePVC, kwaye inciphise ukuchetywa ngaphakathi kwePVC. Izixhobo zokucubungula zinokumelana nemithwalo ephantsi. Okukhona kusetyenziswa ityuwa yelothe eninzi, kokukhona iinxalenye zetyuwa yelothe zicolekile, kwaye kokukhona isiphumo sibonakala ngakumbi.
Iimveliso zemveli ezinobuhlobo nokusingqongileyo ezifana neziqinisi ze-calcium zinc, ngenxa yokuba ziphezulu kwi-electronegativity, zinobuhlobo obuthile phakathi kwamaqela e-polar kunye nama-node acute e-resin ye-PVC ngexesha lenkqubo yokwenza iplastiki, zenze ii-complexes zamandla e-bond eqinileyo, ngaloo ndlela zenza buthathaka okanye kuphelise ukutsalana kwee-ion bonds kwiileya ezahlukeneyo ze-PVC. Oku kwenza ukuba kube lula ukusasaza amacandelo e-chain ye-PVC adityaniswe omnye komnye, kwaye imida phakathi kwamaqela e-molecular kulula ukuyinciphisa, nto leyo ekhuthaza ukwenziwa kwe-PVC resin ibe yiplastiki. Oku kubangela ukunyuka okukhawulezileyo koxinzelelo lokunyibilika, ukwehla kwe-melt viscosity, ukunyuka kobushushu, kunye nokwehla kobushushu bokwenza iplastiki emva kokuba i-resin yenziwe iplastiki kancinci kwicandelo lokutya. Ukuguqulwa kwe-resin plasticization kwenzeke kwakhona.
Ngenxa yokuba izixhobo zokulungisa zemveli zePVC zenzelwe ukucutshungulwa ngeziqinisi zetyuwa yelead, nokuba ukongeza inani elaneleyo le-lubricant akunakuthintela ukwenziwa kwe-resin ibe yiplastiki ngakumbi ngexesha elaneleyo, kwaye kukwaphazamisa ibhalansi yokuthambisa yokuqala. Ukusetyenziswa kwe-PVC melt kwinqanaba le-homogenization kudla isixa esikhulu se-heat stabilizer, kodwa akunakufikelela kwi-viscosity kunye ne-elasticity efanelekileyo ukuhlangabezana neemfuno zemveliso yePVC eqinileyo. Le yingxaki ekufuneka iziqinisi ze-calcium zinc zisombululwe ekutshintsheni iityuwa zelead.
Ixesha lokuposa: Novemba-20-2024
