SBS(styrene-butadiene block copolymer)
LETLOTLO LE LIKOPO
Styrene-butadiene block copolymers ke sehlopha sa bohlokoa sa liraba tsa maiketsetso.Mefuta e 'meli e tsebahalang haholo ke li-linear le radial triblock copolymers tse nang le li-block tsa bohareng ba rabara le li-block tsa polystyrene.Li-elastomer tsa SBS li kopanya thepa ea li-resin tsa thermoplastic le tsa rabara ea butadiene.Li-styrene tse thata, tse nang le likhalase li fana ka matla a mochine le ho ntlafatsa ho hanyetsa ha abrasion, ha rabara e bohareng ba block e fana ka ho feto-fetoha ha maemo le ho tiea.
Litabeng tse ngata, li-elastomer tsa SBS tse nang le li-styrene tse tlase li na le thepa e ts'oanang le ea rabara e senyehileng ea butadiene empa e ka bōptjoa le ho fetisoa ka thepa e tloaelehileng ea thermoplastic.Leha ho le joalo, SBS ha e mamellehe ho feta rabara ea butadiene e kopantsoeng ka lik'hemik'hale (vulcanized) 'me ka hona, ha e hlaphoheloe hantle ho tsoa ho deformation joalo ka vulcanized diene elastomers.
Liraba tsa SBS hangata li kopantsoe le li-polymer tse ling ho ntlafatsa ts'ebetso ea tsona.Hangata oli le li-filler li eketsoa ka theko e tlase le ho ntlafatsa thepa ea bona.
Kopo
SBS e sebelisoa liindastering tse ngata tse fapaneng:likoloi, ho fetola sekontiri, HIPS, lieta le masterbatch.Hangata rabara ea maiketsetso e ratoa ho feta rabara ea tlhaho hobane e phahame ka bohloeki 'me ho bonolo ho e sebetsana.E 'ngoe ea lihlahisoa tsa mantlha tsa BassTech, styrene-butadiene styrene (SBS), ke rabara e tloaelehileng ea maiketsetso e sebelisoang tlhahisong ea indasteri.
1. Styrene-butadiene styrene e khetholloa e le thermoplastic elastomer.
Joaloka thermoplastic elastomer, SBS e sebetsanoa habonolo le ho etsoa hape ha e futhumatsoa.Ha e futhumatsa, e sebetsa joalo ka polasetiki 'me e sebetsa haholo.Sebopeho sa eona (block copolymer e nang le liketane tse peli tsa polystyrene) e lumella motsoako oa polasetiki e thata le thepa ea elastic.
2. Ha ho bapisoa le rabara e tloaelehileng ea vulcanized, ho sebelisa styrene-butadiene styrene ho ka thusa ho fokotsa litšenyehelo tsa tlhahiso.
E ka sebelisoa hape, ha e chefo 'me ha e hloke vulcanizing.SBS e tsofala hantle 'me ha e apare habonolo, e fokotsa tlhokahalo ea ho lokisoa le ho e etsa karolo e bolokang chelete e ngata ea lihlahisoa tsa marulelo.
3. Styrene-butadiene styrene e loketse haholo bakeng sa likopo tsa marulelo.
SBS e sebelisoa haholo lits'ebetsong tsa marulelo joalo ka phetoho ea sekontiri, lisebelisoa tsa tiiso ea metsi le liphahlo tse sa keneleng metsi.Ka mocheso o batang, SBS e lula e le matla, e tenyetseha ebile e hanyetsa mongobo.Ntle le ho rulela, SBS e sebelisetsoa ho palama, li-sealants le liphahlo ho eketsa maemo a batang le ho fokotsa ho ata ho senya ho senya.Joaloka sekontiri sa asphalt, SBS e thibela likoti le mapetsong a bakoang ke ho tsosoa ke mocheso.
4. Styrene-butadiene styrene ke thepa e ratoang bakeng sa baetsi ba lieta.
SBS ke thepa e ntle haholo ha ho etsoa lieta ka mabaka a mangata a tšoanang a etsang hore e be e loketseng ho rulela.Litšeng tsa lieta, styrene-butadiene styrene e tlatsetsa sehlahisoa se matla empa se tenyetseha se ka thibelang metsi.
Thepa e ka Sehloohong ea 'Mele ea Lihlahisoa tsa Baling SBS
| Kereiti | Sebopeho | S/B | Tensile Matla Mpa | Ho thatafala Shore A | MFR (g/10mins, 200℃, 5kg) | Tharollo ea Toluene Viscosity ho 25 ℃ le 25%, mpa.s |
| YH-792/792E | Linear | 38/62 | 29 | 89 | 1.5 | 1,050 |
| YH-791/791E | Linear | 30/70 | 15 | 70 | 1.5 | 2,240 |
| YH-791H | Linear | 30/70 | 20 | 76 | 0.1 | |
| YH-796/796E | Linear | 23/77 | 10 | 70 | 2 | 4,800 |
| YH-188/188E | Linear | 34/66 | 26 | 85 | 6 | |
| YH-815/815E | E bōpehileng joaloka naleli | 40/60 | 24 | 89 | 0.1 | |
| Phetoho ea litsela -2# | E bōpehileng joaloka naleli | 29/71 | 15 | 72 | 0.05 | 1,050* |
| YH-803 | E bōpehileng joaloka naleli | 40/60 | 25 | 92 | 0.05 | |
| YH-788 | Linear | 32/68 | 18 | 72 | 4-8 | |
| YH-4306 | E bōpehileng joaloka naleli | 29/71 | 18 | 80 | 4-8 |
Tlhokomeliso: Ntho e tšoailoeng * ke viscosity ea 15% ea tharollo ea toluene.
“E” e emetse sehlahiswa se sa rateng tikoloho.