I-SBS(styrene-butadiene block copolymer)
IZIMPAHLA KANYE NEZINCELO
I-Styrene-butadiene block copolymers iyisigaba esibalulekile samarabha okwenziwa.Izinhlobo ezimbili ezivame kakhulu ama-linear and radial triblock copolymer anamabhulokhi amaphakathi erabha kanye namabhulokhi okuphela kwe-polystyrene.Ama-elastomer e-SBS ahlanganisa izakhiwo ze-thermoplastic resins nalezo zerabha ye-butadiene.Amabhulokhi aqinile, ayingilazi e-styrene anikeza amandla okusebenza futhi athuthukisa ukumelana nokuhuzuka, kuyilapho ibhulokhi ephakathi kwerabha inikeza ukuguquguquka nokuba namandla.
Ezimweni eziningi, ama-elastomer e-SBS anokuqukethwe okuphansi kwe-styrene anezakhiwo ezifanayo nalezo zenjoloba ye-butadiene ecindezelweyo kodwa angabunjwa futhi akhishwe kusetshenziswa imishini evamile yokucubungula i-thermoplastic.Kodwa-ke, i-SBS ayiqiniseki kangako kunerabha ye-butadiene ehlanganiswe ngamakhemikhali (vulcanized) futhi ngenxa yalokho, ayilulami ngokuphumelelayo enguqukweni njengama-diene elastomers avuthwe.
Amarabha e-SBS avame ukuhlanganiswa namanye ama-polymers ukuthuthukisa ukusebenza kwawo.Imvamisa uwoyela nezigcwalisi zengezwa ezindlekweni eziphansi kanye nokuqhubeka nokulungisa izakhiwo zazo.
Isicelo
I-SBS isetshenziswa ezimbonini eziningi ezahlukene:izimoto, ukuguqulwa kwebitumen, HIPS, amasoli ezicathulo kanye ne-masterbatch.Irabha yokwenziwa ivamise ukuthandwa kunerabha yemvelo ngoba iphezulu ngobumsulwa futhi kulula ukuyiphatha.Omunye wemikhiqizo eyinhloko ye-BassTech, i-styrene-butadiene styrene (SBS), iyirabha yokwenziwa evamile esetshenziswa ekukhiqizeni izimboni.
1. I-styrene-butadiene styrene ihlukaniswa njenge-elastomer ye-thermoplastic.
Njenge-thermoplastic elastomer, i-SBS icutshungulwa kalula futhi icutshungulwe kabusha lapho ishiswa.Lapho ishisa, isebenza njengepulasitiki futhi iyasebenza kakhulu.Isakhiwo sayo (i-block copolymer enamaketanga amabili e-polystyrene) ivumela inhlanganisela yepulasitiki eqinile kanye nezakhiwo ezinwebekayo.
2. Uma kuqhathaniswa nerabha eshisiwe yendabuko, ukusebenzisa i-styrene-butadiene styrene kungasiza ukunciphisa izindleko zokukhiqiza.
Iyakwazi ukugaywa kabusha, imelana nemihuzuko futhi ayidingi ukuvuthwa.I-SBS iguga kahle futhi ayigqoki kalula, inciphisa isidingo sokukhanda futhi iyenze ibe ingxenye engabizi kakhulu yemikhiqizo yokufulela.
3. I-styrene-butadiene styrene ifaneleka kakhulu izicelo zokuphahla.
I-SBS isetshenziswa kakhulu ezinhlelweni zokufulela ezifana nokuguqulwa kwebitumen, izinto zokufaka uphawu lwe-liquid kanye nezingubo ezingangeni manzi.Emazingeni okushisa abandayo, i-SBS ihlala iqinile, iguquguquka futhi imelana nomswakama.Ngaphezu kokufulela, i-SBS isetshenziselwa ukugandaya, ama-sealant kanye nama-coatings ukwengeza ukuguquguquka okubandayo nokunciphisa ukusakazeka kokuqhekeka okulimazayo.Njengesilungisi se-asphalt, i-SBS ivimbela imigodi nokuqhekeka okuvame ukubangelwa ukushaqeka okushisayo.
4. I-styrene-butadiene styrene iyinto ethandwayo yabakhiqizi bezicathulo.
I-SBS iyinto enhle kakhulu ekwenziweni kwezicathulo ngenxa yezizathu eziningi ezifanayo eziyenza ilungele ukufulela.Ematheni ezicathulo, i-styrene-butadiene styrene inikela emkhiqizweni oqinile kodwa oguquguqukayo ongavinjelwa amanzi.
Izakhiwo Eziyinhloko Zomzimba ze-Baling SBS Products
| Ibanga | Isakhiwo | I-S/B | I-tensile Amandla Mpa | Ukuqina Shore A | I-MFR (g/10min, 200℃, 5kg) | Isixazululo se-Toluene I-Viscosity ku-25℃ no-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 | Okumise okwenkanyezi | 40/60 | 24 | 89 | 0.1 | |
| Ukulungiswa komgwaqo -2# | Okumise okwenkanyezi | 29/71 | 15 | 72 | 0.05 | 1,050* |
| YH-803 | Okumise okwenkanyezi | 40/60 | 25 | 92 | 0.05 | |
| YH-788 | Linear | 32/68 | 18 | 72 | 4-8 | |
| YH-4306 | Okumise okwenkanyezi | 29/71 | 18 | 80 | 4-8 |
Qaphela: Into ephawulwe * yi-viscosity yesisombululo se-toluene esingu-15%.
“E” imele umkhiqizo ovumelana nemvelo.