Ma dispersants ndi mafuta omwe amagwiritsidwa ntchito kwambiri pofananiza mitundu ya pulasitiki.Ngati zowonjezera izi zikuwonjezedwa kuzinthu zopangira, ziyenera kuwonjezeredwa kuzinthu zopangira utomoni mugawo lomwelo pakutsimikizira kofananira ndi mtundu, kuti mupewe kusiyana kwamitundu pakupanga kotsatira.
Mitundu ya dispersants ndi: mafuta acid polyureas, base stearate, polyurethane, oligomeric sopo, ndi zina zotero.Mafuta odzola ali ndi zinthu zabwino zobalalika, ndipo amathanso kusintha mawonekedwe amadzimadzi ndi nkhungu zotulutsa mapulasitiki pakumaumba.
Mafuta amagawidwa m'magulu amkati ndi mafuta akunja.Mafuta amkati amakhala ndi kuyanjana kwina ndi ma resins, omwe amatha kuchepetsa kulumikizana pakati pa unyolo wa maselo a utomoni, kuchepetsa kukhuthala kwa ma viscosity, ndikusintha madzimadzi.Kugwirizana pakati pa mafuta akunja ndi utomoni, kumamatira pamwamba pa utomoni wosungunuka kupanga mafuta osanjikizana, potero kuchepetsa kukangana pakati pa utomoni ndi zida zopangira.Mafuta amagawidwa makamaka m'magulu otsatirawa malinga ndi kapangidwe kake ka mankhwala:
(1)) Kuwotcha kalasi monga paraffin, polyethylene sera, polypropylene sera, micronized sera, etc.
(2) Mafuta acids monga stearic acid ndi base stearic acid.
(3) Mafuta a acid amides, esters monga vinyl bis-stearamide, butyl stearate, oleic acid amide, etc. Amagwiritsidwa ntchito makamaka pobalalitsa, momwe bis-stearamide imagwiritsidwa ntchito pazitsulo zonse za thermoplastics ndi thermosetting, ndipo imakhala ndi mphamvu yopangira mafuta. .
(4) Sopo zachitsulo monga stearic acid, zinc stearate, calcium stearate, pot stearate, magnesium stearate, lead stearate, etc.
(5) Mafuta omwe amathandizira kutulutsa nkhungu, monga polydimethylsiloxane (methyl silicone mafuta), polymethylphenylsiloxane (phenylmethyl silicone mafuta), polydiethylsiloxane (ethyl silikoni mafuta) etc.
Munjira yopangira jakisoni, utoto wowuma ukagwiritsidwa ntchito, mankhwala ochizira pamwamba monga mafuta amchere amchere ndi mafuta ophatikizika nthawi zambiri amawonjezedwa pakusakanikirana kuti atenge gawo la adsorption, mafuta, kufalitsa ndi kutulutsa nkhungu.Popaka utoto, zopangira ziyeneranso kuwonjezeredwa molingana ndi kutumizidwa kwapakati.Choyamba yonjezerani chithandizo chamankhwala pamwamba ndikufalitsa mofanana, kenaka yikani tona ndikufalitsa mofanana.
Posankha, kukana kwa kutentha kwa dispersant kuyenera kutsimikiziridwa molingana ndi kutentha kwa kutentha kwa pulasitiki.Kuchokera pakuwona mtengo, makamaka, dissperant yomwe ingagwiritsidwe ntchito pa kutentha kwapakati ndi yotsika siyenera kusankhidwa chifukwa cha kutentha kwakukulu.Kutentha kwakukulu kumafunika kugonjetsedwa ndi 250 ℃.
Zolozera:
[1] Zhong Shuheng.Kupanga Kwamitundu.Beijing: China Art Publishing House, 1994.
[2] Song Zhuoyi et al.Pulasitiki zopangira ndi zowonjezera.Beijing: Science and Technology Literature Publishing House, 2006.
[3] Wu Lifeng et al.Masterbatch User Manual.Beijing: Chemical Industry Press, 2011.
[4] Yu Wenjie et al.Zowonjezera Pulasitiki ndi Ukadaulo Wopanga Zopanga.3rd Edition.Beijing: Chemical Viwanda Press, 2010.
[5] Wu Lifeng.Pulasitiki Coling Formulation Design.2nd Edition.Beijing: Chemical Viwanda Press, 2009
Nthawi yotumiza: Jun-25-2022