Isifinyezo solwazi lohlelo lokusebenza lwe-PVC effect modifiers

(1) CPE

I-Chlorinated polyethylene (CPE) iwumkhiqizo oyimpuphu we-chlorination emisiwe ye-HDPE esigabeni esinamanzi. Ngokukhula kwe-chlorination degree, i-HDPE eyicrystalline yasekuqaleni kancane kancane iba i-amorphous elastomer. I-CPE esetshenziswa njenge-ejenti eqinisayo ngokuvamile inokuqukethwe kwe-chlorine okungama-25-45%. I-CPE inohlu olubanzi lwemithombo namanani aphansi. Ngaphezu kokuqina kwayo, iphinde ibe namandla okumelana nokubanda, ukumelana nesimo sezulu, ukumelana nelangabi, nokungazweli ngamakhemikhali. Njengamanje, i-CPE iyisiguquli esinamandla e-China, ikakhulukazi ekukhiqizeni amapayipi namaphrofayili e-PVC, futhi izimboni eziningi zisebenzisa i-CPE. Inani elingeziwe ngokuvamile liyizingxenye ezingu-5-15. I-CPE ingasetshenziswa ngokubambisana namanye ama-ejenti aqinisayo, njengenjoloba ne-EVA, ukuze kuzuzwe imiphumela engcono, kodwa izithasiselo zenjoloba azimelani nokuguga.

(2) I-ACR

I-ACR iyi-copolymer yama-monomers afana ne-methyl methacrylate ne-acrylic ester. Kuyisilungisi esingcono kakhulu esithuthukisiwe eminyakeni yakamuva futhi singakhuphula amandla omthelela wezinto ngamashumi ambalwa wezikhathi. I-ACR ingeyesishintshi somthelela wesakhiwo segobolondo eliwumgogodla, ohlanganisa igobolondo elakhiwe nge-methyl methacrylate ethyl acrylate polymer, kanye ne-elastomer yerabha eyakhiwe ngokuxhumanisa ne-butyl acrylate njengengxenye yeketango eliwumgogodla esatshalaliswa engxenyeni engaphakathi yezinhlayiya. Ifaneleka ngokukhethekile ukuguqulwa komthelela wemikhiqizo yepulasitiki ye-PVC ukuze isetshenziswe ngaphandle, kusetshenziswa i-ACR njengesishintshi esinomthelela kumnyango wepulasitiki we-PVC namaphrofayela wamafasitela kunezici zokusebenza kahle kokucubungula, indawo ebushelelezi, ukumelana nokuguga okuhle, namandla ekhona lokushisela okuphezulu uma kuqhathaniswa nezinye izilungisi. , kodwa intengo icishe ibe ingxenye eyodwa kwezintathu kune-CPE.

(3) I-MBS

I-MBS iyi-copolymer yama-monomers amathathu: i-methyl methacrylate, i-butadiene, ne-styrene. Ipharamitha ye-solubility ye-MBS iphakathi kuka-94 no-9.5, eseduze nepharamitha ye-solubility ye-PVC. Ngakho-ke, inokuhambisana okuhle ne-PVC. Isici sayo esikhulu ukuthi ngemva kokwengeza i-PVC, ingenziwa ibe umkhiqizo osobala. Ngokuvamile, ukungeza izingxenye ezingu-10-17 ku-PVC kungakhuphula amandla okuthinta izikhathi ezingu-6-15. Kodwa-ke, uma inani le-MBS elengeziwe lidlula izingxenye ezingama-30, amandla omthelela we-PVC ayancipha ngempela. I-MBS ngokwayo inomthelela omuhle ekusebenzeni, obala okuhle, kanye nokudlulisa okungaphezu kwama-90%. Ngenkathi ithuthukisa ukusebenza komthelela, inomthelela omncane kwezinye izici ze-resin, njengamandla aqinile kanye nobude ngesikhathi sekhefu. I-MBS iyabiza futhi ivame ukusetshenziswa ngokuhlanganiswa nezinye izilungisi zomthelela ezifana ne-EAV, i-CPE, i-SBS, njll. I-MBS inokumelana nokushisa okuphansi kanye nokumelana nesimo sezulu, okuyenza ingafaneleki ukusetshenziswa isikhathi eside ngaphandle. Ngokuvamile ayisetshenziswa njengesiguquli somthelela ekukhiqizeni amaphrofayela eminyango yepulasitiki namafasitela.

(4) SBS

I-SBS iyi-ternary block copolymer ye-styrene, butadiene, ne-styrene, eyaziwa nangokuthi irabha ye-thermoplastic styrene butadiene. Ingeka-thermoplastic elastomers futhi ukwakheka kwayo kungahlukaniswa ngezinhlobo ezimbili: okumise okwenkanyezi nomugqa. Isilinganiso se-styrene ne-butadiene ku-SBS singu-30/70, 40/60, 28/72, kanye no-48/52. Isetshenziswa kakhulu njengesilungisi somthelela se-HDPE, PP, ne-PS, esinomthamo wezingxenye ezi-5-15. Umsebenzi oyinhloko we-SBS ukuthuthukisa ukumelana nomthelela wezinga lokushisa eliphansi. I-SBS inokumelana nesimo sezulu esibi futhi ayifanele ukusetshenziswa kwemikhiqizo yangaphandle yesikhathi eside.

(5) ABS

I-ABS iyi-ternary copolymer ye-styrene (40% -50%), i-butadiene (25% -30%), ne-acrylonitrile (25% -30%), esetshenziswa kakhulu njengamapulasitiki wobunjiniyela futhi isetshenziselwa ukuguqulwa komthelela we-PVC, ngokuphansi okuhle. -imiphumela yokuguqulwa komthelela wokushisa. Uma inani le-ABS elingeziwe lifinyelela izingxenye ezingu-50, amandla omthelela we-PVC angalingana nalawo e-ABS emsulwa. Inani le-ABS elengeziwe ngokuvamile liyizingxenye ezingu-5-20. I-ABS inokumelana nesimo sezulu esibi futhi ayifanele ukusetshenziswa isikhathi eside ngaphandle emikhiqizweni. Ngokuvamile ayisetshenziswa njengesiguquli somthelela ekukhiqizeni amaphrofayela eminyango yepulasitiki namafasitela.

(6) EVA

I-EVA iyi-copolymer ye-ethylene ne-vinyl acetate, futhi ukwethulwa kwe-vinyl acetate kushintsha i-crystallinity ye-polyethylene. Okuqukethwe kwe-vinyl acetate kuhluke kakhulu, futhi inkomba ye-refractive ye-EVA ne-PVC ihlukile, okwenza kube nzima ukuthola imikhiqizo esobala. Ngakho-ke, i-EVA ivame ukusetshenziswa ngokuhlanganiswa namanye ama-resin aphikisayo. Inani le-EVA elengeziwe lingaphansi kwezingxenye eziyi-10.