Ama-solid composite calcium zinc stabilizers akhiwa kakhulu insipho ye-stearic acid, kulandele insipho ye-lauric acid kanye nensipho ye-oleic acid. Lo mkhiqizo ubonakala ngokuthamba okuhle futhi awunciphisi iphuzu lokuthambisa lemikhiqizo eqinile ye-PVC, okwenza ufanelekele ukucubungula amapayipi namaphrofayili e-PVC aqinile.
Imikhiqizo ecutshungulwa kusetshenziswa ubuchwepheshe be-microemulsification inqoba izinkinga ezishiwo ngenhla. Abantu bagxila ezicini ezimbili zokuthuthukisa: ukuthuthukisa umbala wokuqala, kufakwa inani elanele lensipho ye-zinc, futhi kusetshenziswa ama-chelating agents ukwenza i-zinc chloride ingabi nangozi. Lokhu kwaziwa ngokuthi ukuhlanganiswa okuphezulu kwe-zinc: ukunciphisa inani lensipho ye-zinc engeziwe ukucindezela ukusha kwe-zinc, nokusebenzisa izithasiselo ukushintsha umbala wokuqala. Le ndlela yaziwa ngokuthi ukuhlanganiswa okuphansi kwe-zinc., Ayisetshenziswa kabanzi emikhiqizweni ethambile kuphela, umphumela wayo wokuzinza kokushisa kanye nokucaca kwayo kuye kwaqashelwa, kodwa futhi isetshenziswa ngempumelelo ekucutshungulweni komkhiqizo oqinile. Ukuze kugcinwe umbala omncane wokuqala kanye nokucindezela ukusha kwe-zinc ohlelweni lwe-calcium/zinc
Ngokuvamile, usawoti we-lead unamathela kuphela ebusweni bezinhlayiya ze-PVC, okusebenza njengesithiyo ekuhlanganisweni kwezinhlayiya ze-PVC, okubambezela kakhulu ukwenziwa kwepulasitiki, ukunciphisa ukungqubuzana phakathi kwezinhlayiya ze-PVC, nokunciphisa ukucheba ngaphakathi kwe-PVC. Imishini yokucubungula ingamelana nemithwalo ephansi. Uma kusetshenziswa usawoti we-lead omningi, izinhlayiya ze-lead zincipha, futhi umphumela uba sobala kakhulu.
Imikhiqizo yendabuko enobungani nemvelo efana neziqinisi ze-calcium zinc, ngenxa ye-electronegativity yazo ephezulu, inobuhlobo obuthile phakathi kwamaqembu e-polar kanye nama-node acute e-resin ye-PVC ngesikhathi senqubo yokwenza ipulasitiki, yakha ama-complexes e-bond energy aqinile, ngaleyo ndlela ibuthakathaka noma iqede ukukhanga kwezibopho ze-ion ezingqimbeni ezahlukene ze-PVC. Lokhu kwenza izingxenye zeketanga ze-PVC ezibambene zodwa zibe lula ukuzisabalalisa, futhi imingcele phakathi kwamaqembu ama-molecule kulula ukuyinciphisa, okukhuthaza ukwenza ipulasitiki kwe-resin ye-PVC. Lokhu kubangela ukwanda okusheshayo kwengcindezi yokuncibilika, ukwehla kwe-viscosity yokuncibilika, ukwanda kwezinga lokushisa, kanye nokwehla kwezinga lokushisa lokwenza ipulasitiki ngemva kokuba i-resin yenziwe ipulasitiki kancane esigabeni sokudla. Ukuguqulwa kwe-resin kube khona futhi.
Ngenxa yokuthi imishini yokucubungula yendabuko ye-PVC yenzelwe ukucutshungulwa ngeziqinisi zikasawoti we-lead, ngisho nokwengeza inani elanele lokuthambisa akukwazi ukuvimbela ukwenziwa kwe-resin ibe yipulasitiki isikhathi esanele, futhi kuphazamisa ibhalansi yokuthambisa yokuqala. Ukusetshenziswa kwe-PVC melt esigabeni se-homogenization kudla inani elikhulu le-heat stabilizer, kodwa akukwazi ukufeza i-viscosity kanye nokuqina okufanele ukuze kuhlangatshezwane nezidingo zokukhiqiza ze-PVC eqinile. Lena inkinga okumele iziqinisi ze-calcium zinc ziyixazulule ekushintsheni usawoti we-lead.
Isikhathi sokuthunyelwe: Novemba-20-2024
