I-SEBS(Styrene Ethylene Butylene Styrene)
I-STYRENE-ETHYLENE-BUTYLENE-STYRENE THERMOPLASTIC ELASTOMER (SEBS)
IZIMPAHLA KANYE NEZINCELO
I-Styrene-ethylene-butylene-styrene, eyaziwa nangokuthi i-SEBS, iyi-elastomer ye-thermoplastic ebalulekile (i-TPE) eziphatha njengenjoloba ngaphandle kokuthola i-vulcanization.I-SEBS inamandla futhi iyavumelana nezimo, inokushisa okuhle kakhulu nokumelana ne-UV futhi kulula ukuyicubungula.Ikhiqizwa i-hydrogenating eyingxenye futhi ekhethiwe ye-styrene-butadiene-styrene copolymer (SBS) ethuthukisa ukuzinza kokushisa, isimo sezulu kanye nokumelana nowoyela, futhi yenza i-SEBS iqhube inzalo. .
Ama-elastomer e-SEBS avame ukuhlanganiswa namanye ama-polymers ukuthuthukisa ukusebenza kwawo.Asetshenziswa njengezilungisi zomthelela ze-thermoplastics yobunjiniyela nanjengama-flexibilizer / ama-tougheners we-polypropylene ecacile (PP).Ngokuvamile uwoyela nezigcwalisi zengezwa ezindlekweni eziphansi kanye / noma ukuze kuqhutshekwe nokulungiswa kwezakhiwo.Izinhlelo zokusebenza ezibalulekile zihlanganisa izinto ezinamathelayo ezizwela ukucindezela kokushisa okuncibilika, imikhiqizo yokudlala, amasoli ezicathulo, kanye nemikhiqizo yebitumen elungiswe i-TPE yokuphendwa komgwaqo nokufaka uphahla.
Ama-styrenics, noma ama-styrenic block copolymers asetshenziswa kakhulu kuwo wonke ama-TPE.Zihlangana kahle nezinye izinto kanye nama-filler nama-modifiers.I-SEBS (i-styrene-ethylene/butylene-styrene) ibonakala ngezizinda eziqinile nezithambile ngaphakathi kwemicu ye-polymer ngayinye.Amabhulokhi wokugcina ayi-crystalline styrene kuyilapho amabhlogo amaphakathi angamabhulokhi athambile e-ethylene-butylene.Emazingeni okushisa aphezulu lezi zinto ziyathambisa futhi zibe uketshezi.Uma selehlile, izintambo zijoyina ekugcineni-amabhulokhi e-styrene enza isixhumanisi esibonakalayo futhi anikeze irabha efana nokunwebeka.Ukucaca kanye nokugunyazwa kwe-FDA kwenza i-SEBS ibe inketho enhle kakhulu yezicelo ezisezingeni eliphezulu.
I-SEBS ingathuthukisa ukusebenza kokuzwela ukucindezela nezinye izinhlelo zokusebenza ezinamathelayo.Ezinye zezicelo ezivame kakhulu zihlanganisa amateyipu ahlukahlukene, amalebula, amaplasta, izinto zokunamathisela zokwakha, izindwangu zezokwelapha, ama-sealant, okokunamathela kanye nopende bomaka bomgwaqo.
I-SEBS ingahlanganiswa ukuze ikhiqize izinto ezithuthukisa ukubamba, ukuzwa, ukubukeka kanye nokusebenziseka kalula kwezinhlelo zokusebenza ezahlukahlukene.Ezemidlalo nokungcebeleka, amathoyizi, inhlanzeko, ukupakisha, izimoto, kanye nezimpahla zobuchwepheshe ezibunjiwe nezandisiwe ezinye zezibonelo ezijwayelekile.
I-SEBS ingasetshenziswa ngokuhlanganiswa nama-filler ahlukahlukene.Ama-Compounders azongeza lezi zihlungi uma ukumuncwa kukawoyela okuthuthukisiwe, ukunciphisa izindleko, ukuzwa okuthuthukisiwe kwendawo, noma ukuqiniswa okwengeziwe okudingekayo nge-SEBS emsulwa.
Mhlawumbe isigcwalisi esivame kakhulu se-SEBS uwoyela.Lawa mafutha azokhethwa kuye ngezidingo ezithile zohlelo.Ukwengeza uwoyela onephunga elimnandi kuthambisa amabhlogo we-PS ngokwenza ipulasitiki enciphisa ubulukhuni nezakhiwo zomzimba.Amafutha enza imikhiqizo ithambe futhi isebenze njengezinsiza zokucubungula.Amafutha kapharafini ayakhethwa ngoba ahambisana kakhulu ne-EB centre block.Amafutha anephunga elimnandi ngokuvamile ayagwenywa ngoba angena futhi enze ipulasitiki izizinda ze-polystyrene.
I-SEBS ingathuthukisa izinhlelo zokusebenza ze-styrene eziphezulu, amafilimu, izikhwama, ifilimu elula kanye nokupakishwa okulahlwayo.Angathuthukisa ukusebenza kwe-polyolefin ukuze asetshenziswe emazingeni okushisa adlulele, athuthukise ukucaca nokumelana nokuklwebheka, futhi athuthukise ukunwebeka.
Izakhiwo Eziyinhloko zeBanga ngalinye lemikhiqizo yochungechunge lwe-SEBS (Inani Elijwayelekile)
| Ibanga | Isakhiwo | Block Isilinganiso | 300% Amandla Okwelula i-MPa | Ensile Amandla MPa | Elongation % | Isethi Yaphakade % | Hardness Shore A | Isixazululo se-Toluene Viscosity at 25 ℃ futhi 25%, mpa.s |
| YH-501/501T | Linear | 30/70 | 5 | 20.0 | 490 | 24 | 76 | 600 |
| YH-502/502T | Linear | 30/70 | 4 | 27.0 | 540 | 16 | 73 | 180 |
| YH-503/503T | Linear | 33/67 | 6 | 25.0 | 480 | 16 | 74 | 2,300 |
| YH-504/504T | Linear | 31/69 | 5 | 26.0 | 480 | 12 | 74 | |
| YH-561/561T | Kuxutshiwe | 33/67 | 6.5 | 26.5 | 490 | 20 | 80 | 1,200 |
| YH-602/602T | Okumise okwenkanyezi | 35/65 | 6.5 | 27.0 | 500 | 36 | 81 | 250 |
| YH-688 | Okumise okwenkanyezi | 13/87 | 1.4 | 10.0 | 800 | 4 | 45 | |
| YH-604/604T | Okumise okwenkanyezi | 33/67 | 5.8 | 30.0 | 530 | 20 | 78 | 2,200 |
Qaphela: I-viscosity yesixazululo se-toluene ye-YH-501/501T ingu-20%, futhi eyabanye ngu-10%.
“T” kusho amanzi ancibilikisiwe.