Ngokwethula i-copolymerization yayo ye-monomer ochungechungeni oluyinhloko lwe-vinyl chloride, kutholakala i-polymer entsha equkethe izixhumanisi ezimbili ze-monomer, ebizwa ngokuthi i-copolymer.Izinhlobo eziyinhloko nezakhiwo zama-copolymers we-vinyl chloride namanye ama-monomers ami kanje:
(1) i-vinyl chloride vinyl acetate copolymer: ukwethulwa kwe-vinyl acetate monomer kungadlala indima ye-plasticizer ejwayelekile, okungukuthi, okuthiwa "i-plasticization yangaphakathi", engagwema ukuhwamuka, ukufuduka, ukukhishwa kanye nezinye iziphambeko ze-plasticizers jikelele. , futhi inganciphisa i-viscosity encibilikayo, inciphise izinga lokushisa lokucubungula futhi ithuthukise ukusebenza kokucubungula.Ngokuvamile, okuqukethwe kwe-vinyl acetate ku-copolymer kungu-3 ~ 14%.
Ukungalungi okuyinhloko kwe-vinyl chloride vinyl acetate copolymer ukuncipha kwamandla aqinile, izinga lokushisa lokushintsha okushisayo, ukumelana nokugqoka, ukuzinza kwamakhemikhali kanye nokuzinza kokushisa.
⑵ I-vinyl chloride vinylidene chloride copolymer: ukwenziwa kwepulasitiki, izinga lokushisa elithambile, ukuncibilika kanye nepulasitiki ye-intramolecular yale copolymer ngokuyisisekelo kuyafana naleyo ye-vinyl chloride vinyl acetate copolymer.Ibonakala ngokudluliswa kwamanzi aphansi kanye negesi, ukuncibilika okuphezulu kuma-ketone solvents, nokumelana nokuhlanjululwa kwe-aromatics, ngakho-ke ingasetshenziswa ngokuphumelelayo ekugqokeni.Ngaphezu kwalokho, isetshenziselwa ukwenza amafilimu anciphayo.Ngenxa yokumelana nokushisa okumpofu nokuzinza kokukhanya uma kuqhathaniswa ne-vinyl chloride vinyl acetate copolymer, kanye nezindleko eziphezulu ze-monomer, ayisetshenziswa kabanzi njenge-vinyl chloride vinyl acetate.
(3) i-vinyl chloride acrylate copolymer: umphumela wangaphakathi we-plasticizing wale copolymer ulingana nalowo we-vinyl chloride vinyl acetate, enokuqina okuhle kokushisayo.Ingasetshenziselwa ukukhiqiza imikhiqizo eqinile nethambile, futhi ithuthukise ukucutshungulwa, ukumelana nomthelela kanye nokumelana nokubanda.Ingase futhi isetshenziselwe ukunamathela, ukubopha, njll.
(4) i-vinyl chloride maleate copolymer: okuqukethwe kwe-maleate kule copolymer cishe ku-15%, futhi umphumela wangaphakathi we-plasticizing ufana nalowo we-vinyl chloride acrylate.Inokucutshungulwa okuhle.Ukuncishiswa kwezakhiwo zomzimba kanye nemishini kuncane, futhi ukumelana nokushisa kuphakeme kunama-copolymers ajwayelekile.
(5) i-vinyl chloride olefin copolymer: i-copolymerization ye-ethylene, i-propylene namanye ama-olefin monomers angakhiqiza ama-copolymer resins ane-fluidity enhle kakhulu, ukuzinza okushisayo, ukumelana nomthelela, obala, ukumelana nokushisa nokunye.
Ukulungiswa kwesisombululo sokugoqa
I-graft egoqayo i-polymerization esebenzayo
Ukuguqulwa ngokwethula amanye ama-monomers ochungechungeni oluseceleni lwe-PVC noma i-vinyl chloride chain ochungechungeni oluseceleni lwama-polymers ahlukahlukene kubizwa ngokuthi i-graft reactive polymerization.
4. I-polymerization yokushisa ephansi
Ukushintsha ukuhlelwa kwezixhumanisi zamaketango ochungechungeni oluyinhloko lwe-PVC noma ukushintsha ukuhlelwa phakathi kwamaketanga e-PVC kusho ukushintsha indlela yokwenza i-polymerization.Lokhu kuguqulwa kubizwa ngokuthi i-low-temperature polymerization.
Isikhathi sokuthumela: Jul-15-2022