1. Ho bonahatsa rabara joalo ka elasticity
Rabara e fapane le matla a rekere a bonts'ang ke coefficient ea longitudinal elastic (Young's modulus).E bua ka seo ho thoeng ke "rabara elasticity" e ka tsosolositsoeng esita le bakeng sa karolo e makholo ea liphesente tse holofetseng ho itšetlehile ka entropy elasticity e hlahisoang ke ho honyela le ho khutla ha liloko tsa limolek'hule.
2. Ho bonahatsa viscoelasticity ea rabara
Ho ea ka molao oa Hooke, ho thoeng ke 'mele oa viscoelastic o nang le thepa e pakeng tsa' mele o otlolohileng le mokelikeli o feletseng.Ke ho re, bakeng sa liketso tse kang deformation e bakoang ke matla a ka ntle, li laoloa ke nako le maemo a mocheso, 'me li bontša liketsahalo tsa creep le khatello ea maikutlo.Nakong ea ho sisinyeha, ho na le phapang ea mohato khatellong ea maikutlo le deformation, e bonts'ang tahlehelo ea hysteresis.Ho lahleheloa ke matla ho bonahala ka mokhoa oa ho hlahisa mocheso ho latela boholo ba oona.Ho feta moo, liketsahalong tse matla, ho itšetleha ka nako le nako ho ka hlokomeloa, e leng se sebetsang ho molao oa ho fetola mocheso oa nako.
3. E na le mosebetsi oa anti vibrate le buffering
Tšebelisano lipakeng tsa bonolo, elasticity, le viscoelasticity ea rabara e bonts'a bokhoni ba eona ba ho fokotsa phetiso ea molumo le thothomelo.Kahoo e sebelisoa ka mehato ea ho fokotsa lerata le tšilafalo ea ho sisinyeha.
4. Ho na le ho itšetleha haholo ka mocheso
Hase rabara feela, empa lisebelisoa tse ngata tsa 'mele tsa thepa ea polymer ka kakaretso li angoa ke mocheso,' me rabara e na le tšekamelo e matla ea ho ba le viscoelasticity, e leng eona e amehang haholo ke mocheso.Ka kakaretso, rabara e na le tšekamelo ea ho embrittlement ka mocheso o tlaase;Ka mocheso o phahameng, letoto la lits'ebetso tse kang ho nolofatsa, ho qhibiliha, oxidation ea mocheso, ho senyeha ha mocheso le ho chesa ho ka etsahala.Ho feta moo, hobane rabara e na le lintho tse phelang, ha e na ho lieha ha lelakabe.
5. Litšobotsi tsa ho kenya motlakase
Joalo ka polasetiki, rabara qalong e ne e le insulator.E sebelisoa letlalong la ho kenya letsoho le likarolo tse ling, litšobotsi tsa motlakase tsa motlakase le tsona li ameha ka lebaka la libopeho tse fapaneng.Ho phaella moo, ho na le li-rubber tsa conductive tse fokotsang ka matla ho hanyetsa ho thibela ho thibela motlakase.
6. Ketsahalo ea botsofali
Ha ho bapisoa le ho bola ha tšepe, lehong, lejoe le ho senyeha ha lipolasetiki, liphetoho tsa thepa tse bakoang ke maemo a tikoloho li tsejoa e le liketsahalo tsa botsofali indastering ea rabara.Ka kakaretso, ho thata ho bolela hore rabara ke thepa e nang le nako e telele ea nako e telele.Mahlaseli a UV, mocheso, oksijene, ozone, oli, solvents, lithethefatsi, khatello ea maikutlo, ho thothomela, joalo-joalo ke lisosa tse ka sehloohong tsa botsofali.
7. Ho hlokahala ho eketsa sebabole
Mokhoa oa ho hokahanya ketane joalo ka lipolymeri tsa rabara tse nang le sebabole kapa lintho tse ling o bitsoa tlatsetso ea sebabole.Ka lebaka la phokotso ea phallo ea polasetiki, sebopeho, matla le lisebelisoa tse ling tsa 'mele lia ntlafatsoa, 'me mefuta ea mocheso oa tšebeliso ea atolosoa, e leng se hlahisang ts'ebetso e ntlafetseng.Ho phaella ho sebabole sulfidation e loketseng bakeng sa elastomers le litlamo habeli, ho boetse ho na le peroxide sulfidation le ammonium sulfidation sebelisa peroxides.Ka rabara ea thermoplastic, e tsejoang hape e le rabara joalo ka lipolasetiki, ho boetse ho na le tse sa hlokeng tlatsetso ea sebabole.
8. Foromo e hlokahalang
Ka rabara ea maiketsetso, mekhelo e etsoa moo ho sa hlokeheng libopeho tse kang polyurethane (ntle le li-crosslinking agents).Ka kakaretso, rabara e hloka libopeho tse fapaneng.Ho bohlokoa ho bua ka mofuta le palo ea tlhahiso e khethiloeng e le "ho theha foromo" ho theknoloji ea ho lokisa rabara.Likarolo tse poteletseng tsa mokhoa o sebetsang o tsamaellanang le morero le ts'ebetso e hlokahalang li ka boleloa e le theknoloji ea bahlahisi ba fapaneng ba ts'ebetso.
9. Likarolo tse ling
(a) Matla a khoheli a khethehileng
Mabapi le rabara e tala, rabara ea tlhaho e tloha ho 0.91 ho ea ho 0.93, EPM e tloha ho 0.86 ho ea ho 0.87 e le e nyenyane ka ho fetisisa, 'me mefuta ea fluororubber e tloha ho 1.8 ho ea ho 2.0 e le eona e kholo ka ho fetisisa.Rabara e sebetsang e fapana ho ea ka foromo, ka matla a khoheli a itseng a ka bang 2 bakeng sa carbon black le sulfur, 5.6 bakeng sa metsoako ea tšepe e kang zinc oxide, le hoo e ka bang 1 bakeng sa metsoako ea tlhaho.Maemong a mangata, matla a khoheli a khethehileng a tloha ho 1 ho ea ho 2. Ho feta moo, maemong a ikhethang, ho boetse ho na le lihlahisoa tse nang le boleng bo boima tse kang lifilimi tse sa utloahaleng tse tletseng phofo ea loto.Ka kakaretso, ha e bapisoa le litšepe le lisebelisoa tse ling, ho ka boleloa hore e bobebe.
(b) Ho thatafala
Ka kakaretso, e atisa ho ba bonolo.Le hoja ho na le ba bangata ba nang le boima bo tlaase ba bokaholimo, hoa khoneha ho fumana sekhomaretsi se thata se ts'oanang le rabara ea polyurethane, e ka fetoloang ho latela libopeho tse fapaneng.
(c) Ho kenya moea
Ka kakaretso, ho thata ho sebelisa moea le likhase tse ling e le lisebelisoa tsa ho tiisa.Rabara ea Butyl e na le bokhoni bo botle ba ho se phefumolohe, athe rabara ea silicone e batla e phefumoloha habonolo.
(d) Ho thibela metsi
Ka kakaretso, e na le thepa e sa keneleng metsi, tekanyo e phahameng ea ho monya metsi ho feta polasetiki, 'me e ka fihla liperesente tse mashome a 'maloa metsing a belang.Ka lehlakoreng le leng, mabapi le ho hanyetsa metsi, ka lebaka la lintlha tse kang mocheso, nako ea ho qoelisoa, le ho kenella ha acid le alkali, rabara ea polyurethane e ka 'na ea e-ba le ho arohana ha metsi.
(e) Ho hanyetsa lithethefatsi
Ka kakaretso, e na le khanyetso e matla ho lithethefatsi tse sa tsitsang, 'me hoo e ka bang rabara eohle e ka mamella likhahla tse tlase tsa alkali.Liraba tse ngata li fetoha brittle ha li kopana le li-acid tse matla tsa oxidizing.Le hoja e hanyetsa ho feta mafura a mafura a kang lithethefatsi tsa tlhaho tse kang joala le ether.Empa ka hydrogen carbide, acetone, carbon tetrachloride, carbon disulfide, metsoako ea phenolic, joalo-joalo, li hlaseloa habonolo 'me li baka ho ruruha le ho fokola.Ho phaella moo, mabapi le ho hanyetsa oli, ba bangata ba ka mamella oli ea liphoofolo le meroho, empa ba tla holofala 'me ba atisa ho ruruha ha ba kopana le petroleum.Ho feta moo, e boetse e susumetsoa ke lintlha tse kang mofuta oa rabara, mofuta le boholo ba sebopeho, le mocheso.
(f) Apara khanyetso
Ke tšobotsi e hlokahalang ka ho khetheha masimong a lithaere, mabanta a masesaane, lieta, joalo-joalo Ha ho bapisoa le ho apara ho bakoang ke ho thella, ho roala ka thata ke bothata bo bongata.Rabara ea polyurethane, rabara ea tlhaho, rabara ea butadiene, joalo-joalo li na le khanyetso e ntle ea ho apara.
(g) Ho hana mokhathala
E bua ka ho tšoarella nakong ea deformation khafetsa le vibrate.Le hoja ho lelekisa ho le thata ho hlahisa mapetsong le tsoelo-pele ka lebaka la ho futhumatsa, e boetse e amana le liphetoho tse bonahalang tse bakoang ke liphello tsa mechine.SBR e phahametse rabara ea tlhaho ho latela tlhahiso ea crack, empa sekhahla sa kholo ea eona e potlakile ebile e fokola haholo.E angoa ke mofuta oa rabara, amplitude ea matla, lebelo la deformation, le agent e matlafatsang.
(h) Matla
Rabara e na le thepa ea ho tsitsisa (matla a fracture, elongation,% modulus), matla a hatellang, matla a ho kuta, matla a ho tabola, joalo-joalo Ho na le likhomaretsi tse kang rabara ea polyurethane e leng rabara e hloekileng e nang le matla a mangata, hammoho le liraba tse ngata tse ntlafalitsoeng ka ho kopanya. mahlahana le disebediswa tse matlafatsang.
(i) Ho hanyetsa lelakabe
E bua ka papiso ea sekhahla sa ho chesa le ho tuka ha thepa ha li kopana le mollo.Leha ho le joalo, ho rotha, chefo ea tlhahiso ea khase, le bongata ba mosi le tsona ke litaba.Hobane rabara e na le lintho tse phelang, e ke ke ea khona ho chesoa ke mollo, empa e ntse e tsoela pele ho ea ho thepa e thibelang malakabe, hape ho na le liraba tse nang le thepa e thibelang malakabe joalo ka rabara ea fluororubber le chloroprene.
(j) Ho khomarela
Ka kakaretso, e na le ho khomarela hantle.E qhibilihisoa ka solvent mme e tlas'a ts'ebetso ea sekhomaretsi, mokhoa ona o ka finyella thepa ea sekhomaretsi ea tsamaiso ea rabara.Lithaere le likarolo tse ling li kopantsoe ho ipapisitsoe le tlatsetso ea sebabole.Rabara ea tlhaho le SBR li hlile li sebelisoa ho kopanya rabara ho rabara, rabara ho fiber, rabara ho polasetiki, rabara ho tšepe, joalo-joalo.
(k) Chefo
Ha ho etsoa rabara, li-stabilizers le li-plasticizers tse ling li na le lintho tse kotsi, 'me li-pigments tse thehiloeng ho cadmium le tsona li lokela ho hlokomeloa.
Nako ea poso: Mar-08-2024
