I-Polyisobutylene (PIB)iyisithako esiqinile noma esiqinile kancane, ukumelana nokushisa, ukumelana nomoya-mpilo, ukumelana ne-ozone, ukumelana nesimo sezulu, ukumelana ne-ultraviolet, ukumelana ne-asidi ne-alkali kanye namanye amakhemikhali ukusebenza kahle. I-Polyisobutylene iyi-homopolymer ye-isobutylene engenambala, engenaphunga, engenabo ubuthi. Ngenxa yezindlela ezahlukene zokulungiselela kanye nezimo zobuchwepheshe, inani le-molecular Chemicalbook le-polyisobutylene liyahlukahluka ngobubanzi. Iningi lesisindo sama-molecule somkhiqizo lifinyelela ngaphezu kuka-10,000 kuya ku-200,000 lizoguqulwa lisuke kuketshezi olujiyile libe yi-semi-solid, bese lishintshela ku-elastomer efana nerabha. I-Polyisobutylene imelana ne-asidi, i-alkali, usawoti, amanzi, i-ozone kanye nokuguga, futhi inomoya omuhle kakhulu kanye nokufakwa kogesi.
Izakhiwo zamakhemikhali:uketshezi oluthambile olungenambala kuya kophuzi olukhanyayo noma irabha ethambile efana ne-semisolid (isisindo esiphansi sama-molecule sithambile futhi sithambile, isisindo sama-molecule aphezulu sithambile futhi siyanwebeka). Konke akunaphunga, akunaphunga noma kunephunga elimnandi kancane. Isisindo sama-molecule esimaphakathi singu-200,000 ~ 87 million. Kuncibilika ku-benzene kanye ne-diisobutyl Chemicalbook, kungaxutshwa ne-polyvinyl acetate, i-wax, njll., kungancibiliki emanzini, utshwala kanye nezinye izinyibilikisi ze-polar. Kungenza ushukela we-gum ube nobumnene obuhle kakhulu ekushiseni okuphansi, futhi kunobumnene obuthile ekushiseni okuphezulu ukuze kulungiswe amaphutha e-polyvinyl acetate lapho kubanda, kushisa futhi kuthambe kakhulu lapho kuhlangana nokushisa komlomo.
Izicelo:I-PIB yaziwa ngezakhiwo zayo ezinhle kakhulu zokuvala nokunamathisela, ezivame ukusetshenziswa kuma-adhesive, ezimbozweni, nasezimbozweni. Izakhiwo ze-PIB ezifana nerabha ziyenza ibe yisinqumo esihle kakhulu sokuvala nokufaka ama-bonding, njengoba kusiza ukuhlinzeka ngesibopho esiqinile nesihlala isikhathi eside ezindaweni eziningi. Ngaphezu kokusetshenziswa kwayo okusebenzayo, i-PIB ivame ukusetshenziswa ezimonyweni nasezintweni zokunakekelwa komuntu siqu ngenxa yezakhiwo zayo ezinhle kakhulu zokuncibilika. Le nto ivame ukuhlanganiswa nezinye izithako ukudala imikhiqizo enokwakheka nomuzwa ohlukile.
I-PIB inezinhlobo eziningi zezicelo embonini yokudla. Le nto ivame ukusetshenziswa njengesithako sokujiya, isiqiniseko, kanye ne-emulsifier ekudleni okucutshunguliwe. I-PIB ingasiza futhi ekuthuthukiseni ukuthungwa kanye nokuvumelana kwemikhiqizo efana ne-ayisikhilimu, i-chewing gum, kanye nezinto ezibhakiwe. Ukuguquguquka kwe-PIB kuyenza ibe yisithako esibalulekile kubakhiqizi embonini yokudla.
I-PIB isetshenziswa kabanzi embonini yezokwelapha. Izakhiwo zalesi sidakamizwa ezingezona ezinobuthi zisenza sibe yindawo ekahle yokusetshenziswa kwezokwelapha. Lesi sidakamizwa sivame ukusetshenziswa njengesiqinisi emithini yokugoma, kanye nesithako emithini eminingi. Imvelo ye-PIB yokungathandi amanzi iyasiza ukuthi inamathele esikhumbeni, okwenza ibe usizo ekukhiqizeni izinamathiselo zezokwelapha.
Izici:I-Polyisobutylene inezakhiwo zamakhemikhali zama-hydrocarbon agcwele, kanti iqembu le-methyl le-side chain liyi-symmetrical distribution eqinile, okuyi-polymer ehlukile. Isimo sokuhlanganiswa kanye nezakhiwo ze-polyisobutylene kuncike esisindweni sayo sama-molecule kanye nokusatshalaliswa kwesisindo sama-molecule. Lapho isisindo sama-molecule esijwayelekile siphakathi kuka-70000 ~ 90000, i-polyisobutylene ishintsha kusuka ku-liquid ephendukayo ibe yi-elastic solid. Ngokuvamile, ngokuya ngobukhulu besisindo sama-molecule se-polyisobutylene ihlukaniswe ngochungechunge olulandelayo: isisindo sama-molecule esiphansi se-polyisobutylene (isisindo sama-molecule esimaphakathi = 200-10000); isisindo sama-molecule esimaphakathi se-polyisobutylene (isisindo sama-molecule esimaphakathi = 20000-45,000); isisindo sama-molecule esiphezulu se-polyisobutylene (isisindo sama-molecule esimaphakathi = 75,000-600,000); isisindo sama-molecule esiphezulu kakhulu se-polyisobutylene (inani lesisindo sama-molecule esimaphakathi esingaphezu kuka-760000).
1. Ukuqina komoya
Esinye sezici ezivelele ze-polyisobutylene ukuqina kwayo komoya okuhle kakhulu. Ngenxa yokuba khona kwamaqembu amabili e-methyl afakwe esikhundleni, ukunyakaza kwe-molecular chain kuhamba kancane kanti ivolumu yamahhala incane. Lokhu kuphumela ekulinganisweni okuphansi kokusabalalisa kanye nokuvuleka kwegesi.
2. Ukuncibilika
I-Polyisobutylene iyancibilika ku-aliphatic hydrocarbon, i-aromatic hydrocarbon, uphethiloli, i-naphthene, uwoyela wamaminerali, i-chlorinated hydrocarbon kanye ne-carbon monosulfide. Uma incibilika kancane kuma-alcohols aphezulu noshizi, noma ivuvukele kuma-alcohols, ama-ether, ama-monomers, ama-ketones kanye nezinye izinyibilikisi kanye namafutha ezilwane nawemifino, izinga lokuvuvukala liyakhula ngokwanda kobude be-solvent carbon chain chain; Uma ingancibiliki kuma-alcohols aphansi (njenge-methanol, i-ethanol, i-isopropyl alcohol, i-ethylene glycol kanye ne-coethylene glycol), ama-ketone (njenge-acetone, i-methyl ethyl ketone) kanye ne-glacial acetic acid.
3. Ukumelana namakhemikhali
I-Polyisobutylene imelana ne-asidi kanye ne-alkali. Njenge-ammonia, i-hydrochloric acid, i-60% hydrofluoric acid, isixazululo samanzi se-lead acetate, i-85% phosphoric acid, i-40% sodium hydroxide, amanzi anosawoti agcwele, i-800} sulfuric acid, i-38% sulfuric acid +14% nitric acid egugulekayo, Kodwa-ke, ayikwazi ukumelana nokuguguleka kwama-oxidant aqinile, ama-oxidant abuthakathaka ashisayo (njenge-60% potassium permanganate), amanye ama-acid aqinile ashisayo (njenge-373K acetic acid) kanye nama-halogen (i-fluorine, i-chlorine, ihlane).
Ukupakisha: 180KG isigubhu
Indawo Yokugcina: Gcina endaweni epholile, enomoya, neyomile evikelwe yilanga ngesikhathi sokuthuthwa.
Ekuphetheni, i-PIB iyinto eyigugu enezinhlelo eziningi zokusebenza ezimbonini ezahlukahlukene. Izakhiwo zayo ezinhle kakhulu zokuvala nokunamathisela, kanye nokuncibilika kwayo kanye nokuguquguquka kwayo, kuyenza ifaneleke kakhulu ukusetshenziswa ngaphakathi kwezimonyo, ukunakekelwa komuntu siqu, ukudla, kanye nezimboni zezokwelapha. Njengomhlinzeki ohamba phambili we-PIB, sizinikele ekuhlinzekeni amakhasimende ethu ngemikhiqizo nezinsizakalo ezisezingeni eliphezulu ukuze kuhlangatshezwane nezidingo zabo embonini.
Isikhathi sokuthunyelwe: Juni-19-2023