ABS
Ts'ebetso ea ABS
ABS e entsoe ka lik'hemik'hale tse tharo tse bitsoang acrylonitrile, butadiene le styrene. Ho ea ka pono ea morphology, ABS ke lisebelisoa tse se nang kristale, tse nang le matla a phahameng a mochine le ts'ebetso e ntle e "matla, e thata, ea tšepe" e phethahetseng. Ke polymer ea amorphous, ABS ke polasetiki ea boenjiniere e akaretsang, mefuta-futa ea eona, tšebeliso e pharaletseng, e tsejoang hape e le "polasetiki e akaretsang", ABS e bonolo ho monya mongobo, matla a khoheli a khethehileng ke 1.05g / cm3 (e boima ho feta metsi), ho fokotseha ho tlaase. sekhahla (0.60%), boholo bo tsitsitseng, ts'ebetso e bonolo ea ho bopa.
Litšobotsi tsa ABS haholo-holo li itšetlehile ka karo-karolelano ea li-monomers tse tharo le sebopeho sa limolek'hule tsa mekhahlelo e 'meli. Sena se lumella ho fetoha ha maemo ho hoholo ha moralo oa sehlahisoa, 'me ka hona ho hlahisa lisebelisoa tse makholo tse fapaneng tsa boleng ba ABS' marakeng. Lisebelisoa tsena tsa boleng bo fapaneng li fana ka litšoaneleho tse fapaneng, tse kang ho hanyetsa matla a mahareng ho isa ho a phahameng, ho fihlela qetellong ho ea holimo le litšoaneleho tse sothehileng tsa mocheso o phahameng. Lisebelisoa tsa ABS li na le machinability e ntle haholo, litšoaneleho tsa ponahalo, ho thella ho tlase, botsitso bo botle ba sebopeho le matla a tšusumetso e phahameng.
ABS ke resin e 'mala o mosehla o mosehla, e se nang chefo, e sa latsoeheng, e monyang metsi a tlase, e na le thepa e ntle ea 'mele le mochini, joalo ka thepa e ntle ea motlakase, ho hanyetsa ho roala, botsitso ba dimensional, khanyetso ea lik'hemik'hale le gloss ea bokaholimo, 'me ho bonolo ho e sebetsa. le sebopeho. Mefokolo ke ho hanyetsa boemo ba leholimo, ho hanyetsa mocheso ho fokola, le ho cha.
Litšobotsi tsa ts'ebetso ea ABS
ABS e na le hygroscopiness e phahameng le kutloisiso ea mongobo. E tlameha ho omisoa ka botlalo le ho futhumatsoa pele e etsoa le ho sebetsa (ho omisa ho 80 ~ 90C bonyane lihora tse 2), 'me mongobo o laoloa ka tlase ho 0.03%.
The melt viscosity ea ABS resin ha e utloe hantle mocheso (e fapane le li-resin tse ling tsa amorphous). Leha mocheso oa ente ea ABS o phahame hanyane ho feta oa PS, o ka se be le mefuta e mengata ea ho futhumala joalo ka PS. The viscosity ea ABS e ke ke ea fokotsoa ke ho futhumatsa ho foufetseng. The liquidity ea ABS e ka ntlafatsoa ka ho eketsa lebelo la screw kapa khatello ea ente. Mocheso o akaretsang oa ho sebetsa ho 190-235 ℃ o loketse.
The melting viscosity ea ABS e bohareng, e phahame ho feta ea PS, HIPS le AS, 'me khatello e phahameng ea ente (500-1000 bar) ea hlokahala.
Lisebelisoa tsa ABS tse nang le lebelo la ente e mahareng le e phahameng li na le phello e ntle. (ntle le haeba sebopeho se rarahane mme likarolo tse tšesaane tsa marako li hloka tekanyo e phahameng ea ente), sehlahisoa se bonolo ho hlahisa mela ea khase molomong.
Mocheso oa ho bopa oa ABS o phahame, mocheso oa eona oa hlobo hangata o fetoloa ho 25-70 ℃. Ha ho etsoa lihlahisoa tse kholoanyane, mocheso o tsitsitseng (mofuta o ka pele) hangata o phahame hanyenyane ho feta hlobo e tsamaeang (mofuta o ka morao) hoo e ka bang 5 ℃ e loketse. (Mocheso oa hlobo o tla ama pheletso ea likarolo tsa polasetiki, mocheso o tlase o tla lebisa pheletsong e tlase)
ABS ha ea lokela ho lula ka moqomong o phahameng oa mocheso nako e telele haholo (ka tlase ho metsotso e 30), ho seng joalo ho bonolo ho senyeha le ho mosehla.
Mofuta o tloaelehileng oa lisebelisoa
Likoloi (liphanele tsa liletsa, mamati a lithulusi, likoahelo tsa mabili, mabokose a khantšang, joalo-joalo), lihatsetsi, lisebelisoa tse matla haholo (li omisa moriri, li-mixer, lisebelisoa tsa lijo, mochini o chehang mohloa, joalo-joalo), lik'hasete tsa mehala, likonopo tsa ho thaepa, likoloi tsa boithabiso tse joalo. joalo ka likariki tsa kolofo le li-jet sledges joalo-joalo.
PMMA
Ts'ebetso ea PMMA
PMMA ke polymer ea amorphous, eo hangata e tsejoang e le plexiglass. Ponaletso e ntle haholo, ho hanyetsa mocheso o motle (mocheso oa mocheso oa mocheso oa 98 ℃), o nang le litšobotsi tse ntle tsa ho hanyetsa, lihlahisoa tsa eona tsa matla a mahareng a mochine, boima bo tlaase ba holim'a metsi, ho bonolo ho phunyeletsoa ke lintho tse thata le ho tlohela mesaletsa, ha e bapisoa le PS, ha ho bonolo ho crack, matla a khoheli a khethehileng a 1.18g/cm3. PMMA e na le thepa e ntle ea optical le ho hanyetsa boemo ba leholimo. Ho kenella ha leseli le lesoeu ho ka holimo ho 92%. Lihlahisoa tsa PMMA li na le li-birefringence tse tlase haholo, tse loketseng haholo tlhahiso ea li-disk tsa video. PMMA e na le litšobotsi tsa mocheso oa kamore. Ka keketseho ea mojaro le nako, khatello ea maikutlo e ka baka khatello.
Litšobotsi tsa ts'ebetso ea ABS
Litlhoko tsa ho sebetsa tsa PMMA li thata haholo, li na le maikutlo a mangata ho metsi le mocheso, pele li sebetsa ho omella ka ho feletseng (maemo a ho omisa a khothalletsoang a 90 ℃, 2 ho lihora tse 4), viscosity ea eona e qhibilihisang e kholoanyane, e hloka ho thehoa ka holimo (225). -245 ℃) le khatello, mocheso oa shoa ka 65-80 ℃ o betere. PMMA ha e tsitsitse haholo, 'me ho senyeha ho ka bakoa ke mocheso o phahameng kapa ho lula nako e telele mocheso o phahameng. Lebelo la sekoti ha lea lokela ho ba le leholo haholo (60% kapa ho feta), likarolo tse teteaneng tsa PMMA li bonolo ho hlaha "cavity", li hloka ho nka heke e kholo, "mocheso o tlaase oa thepa, mocheso o phahameng oa lefu, lebelo le liehang" mokhoa oa ente oa ho sebetsa.
Mofuta o tloaelehileng oa lisebelisoa
Indasteri ea likoloi (lisebelisoa tsa mabone a mabone, lisebelisoa tsa lisebelisoa joalo-joalo), indasteri ea meriana (setshelo sa polokelo ea mali joalo-joalo), ts'ebeliso ea indasteri (video disc, light scatterer), thepa ea bareki (linoelo tsa seno, lintho tsa ho ngola joalo-joalo).
Nako ea poso: 23-11-22