Yiziphi izinzuzo kanye nobubi bokwengeza i-hydrotalcite kuma-calcium zinc stabilizers?

IHydrotalc iyimpahla eluhlaza engadingeki kuma-calcium zinc stabilizers. I-Hydrotalc inesakhiwo esikhethekile kanye nezakhiwo, futhi izakhiwo zayo eziyisisekelo ziyi-alkalinity kanye ne-multi porosity, ngokusebenza okuyingqayizivele nokusebenza okuhle kakhulu kanye nempumelelo. Ingakwazi ukumunca ngempumelelo i-hydrogen chloride ekhishwe ngesikhathi sokucekelwa phansi kwe-PVC, yehlise ijubane umphumela wokuzenzela we-hydrogen chloride kunhlaka ye-PVC, futhi isebenze njengemunca i-asidi, eyaziwa nangokuthi ukuzinza kwe-thermal. Ngokuvamile isetshenziswa njenge-stabilizer eshisayo.
IHydrotalc nayo inezinzuzo zokungafihli kahle okuhle, ukwahlukanisa, ukumelana nesimo sezulu, kanye nokusebenza kahle. Ayingcoliswanga ama-sulfide, angenabuthi, futhi ingasebenza ngokubambisana neziqinisi zokushisa njengensipho ye-zinc kanye ne-organic tin. Iwuhlobo oluthembisayo kakhulu lwesizinzisi esisizayo esingenabuthi.
Isakhiwo se-hydrotalcite sigqitshwe ngesikhala esikhulu se-interlayer esingu-0.76-0.79nm, futhi inendawo enkulu ethize, evumela amaqembu ayo e-hydroxyl engaphezulu ukuthi asabele ngokugcwele nge-hydrogen chloride futhi ibe nomthelela omuhle kuzinzisi.
Ububi be-hydrotalcite buyi:
1. Mayelana nokuba mhlophe kwasekuqaleni, i-hydrotalcite ayinawo umthelela ekuthuthukisweni kombala wokuqala we-PVC kungaba iyodwa noma ku-synergy nesistimu ye-calcium zinc. Ngemva kokuguga kuhhavini oshisayo ongu-180 ℃, umbala wesampula uvame ukubabomvu.
2. Ngokuzinza kokushisa okubomvu kwe-Congo, isenzo esisodwa se-hydrotalcite singathuthukisa isikhathi sokuzinza esishisayo se-PVC, futhi ngokunyuka kwenani elingeziwe, isikhathi sokuzinza esishisayo se-PVC sibonisa umkhuba okhulayo, kodwa ukwanda akubalulekile.
3. Uma inhlanganisela ye-hydrotalcite ne-calcium zinc system isetshenziswa njengesiqinisi esishisayo, isikhathi sokuzinza esishisayo se-PVC sithuthukiswa kakhulu, futhi umkhuba wokwandisa isikhathi sokuzinza okushisayo ngenani elikhulayo lokwengeza nalo liyaneliseka. Ngakho-ke, i-dihydroxy metal hydroxides kufanele ihlukaniswe njengezinzile zesikhathi eside ezisizayo ezishisayo, ezinganweba ngempumelelo isikhathi eside sokuzinza kokushisa kwe-PVC. Ngakho-ke, lapho kuhlanganiswa i-calcium zinc stabilizers, i-hydrotalcite ingenye yezinto ezibalulekile zokusetshenziswa.