I-Polyisobutylene (PIB)

I-Polyisobutylene (PIB)yinto engenambala, engenancasa, engenatyhefu etyebileyo okanye eqinileyo, ukumelana nobushushu, ukumelana neoksijini, ukumelana ne-ozone, ukumelana nemozulu, ukumelana ne-ultraviolet, ukumelana ne-asidi kunye ne-alkali kunye nezinye iikhemikhali ukusebenza kakuhle. I-Polyisobutylene yi-isobutylene homopolymer engenambala, engenavumba, engenatyhefu. Ngenxa yeendlela ezahlukeneyo zokulungiselela kunye neemeko zobuchwepheshe, ubungakanani be-molecular Chemicalbook ye-polyisobutylene buyahluka kuluhlu olubanzi. Uninzi lobunzima be-molecular bemveliso bufikelela kwi-10,000 ukuya kwi-200,000 buya kuguqulwa bube lulwelo oluqinileyo lube yi-semi-solid, emva koko butshintshelwe kwi-elastomer efana nerabha. I-Polyisobutylene ayimelani ne-asidi, i-alkali, ityuwa, amanzi, i-ozone kunye nokuguga, kwaye inomoya oqinileyo kunye nobushushu bombane.

Iimpawu zekhemikhali:ulwelo olungenambala ukuya koluphuzi olukhanyayo oluqinileyo okanye irabha ethambileyo (ubunzima obuphantsi bemolekyuli buthambile, ubunzima bemolekyuli obuphezulu buthambile kwaye buthambile). Zonke azinavumba, azinavumba okanye zinuka kancinci. Ubunzima obuphakathi bemolekyuli yi-200,000 ~ 87 yezigidi. Inyibilika kwi-benzene kunye ne-diisobutyl Chemicalbook, inokuxutywa ne-polyvinyl acetate, i-wax, njl.njl., inganyibiliki emanzini, utywala kunye nezinye izinyibilikisi ze-polar. Ingenza iswekile yegum ibe nokuthamba okuhle kakhulu kubushushu obuphantsi, kwaye ine-plasticity ethile kubushushu obuphezulu ukuze ihlawulele iintsilelo ze-polyvinyl acetate xa kubanda, kushushu kwaye ithambile kakhulu xa idibana nobushushu bomlomo.

Izicelo:I-PIB yaziwa ngeempawu zayo ezibalaseleyo zokutywina kunye nokuncamathelisa, ezisetyenziswa rhoqo kwi-adhesives, coatings, kunye ne-sealants. Iimpawu ze-PIB ezifana nerabha zenza ukuba ibe lukhetho oluhle kakhulu lokufaka kunye nokufaka i-bond, njengoko inceda ekuboneleleni nge-bond eqinileyo nehlala ixesha elide kwiindawo ezininzi. Ukongeza ekusetyenzisweni kwayo okusebenzayo, i-PIB isetyenziswa rhoqo kwi-cosmetics nakwizinto zokunyamekela umntu ngenxa yeempawu zayo ezibalaseleyo zokunyibilika. Le nto idla ngokudityaniswa nezinye izithako ukwenza iimveliso ezine-texture kunye ne-motivation eyahlukileyo.

I-PIB ineendlela ezahlukeneyo zokusetyenziswa kwishishini lokutya. Le nto isetyenziswa kakhulu njengesithambisi, isizinzisi, kunye ne-emulsifier ekutyeni okucutshungulwayo. I-PIB inokunceda ekuphuculeni ubume kunye nokuhambelana kweemveliso ezifana ne-ayisikhrim, i-chewing gum, kunye nezinto ezibhakiweyo. Ukuguquguquka kwe-PIB kuyenza ibe sisithako esibalulekileyo kubavelisi kwishishini lokutya.

I-PIB ikwasetyenziswa kakhulu kwishishini lezonyango. Iimpawu ezingezizo iityhefu zale nto zenza ukuba ilungele ukusetyenziswa kwezonyango. Le nto idla ngokusetyenziswa njenge-stabilizer kwiigonyo, kunye nesithako kwimithi emininzi. Indalo ye-PIB yokungangeni emanzini iyinceda ukuba inamathele eluswini, nto leyo eyenza ibe luncedo ekuveliseni izincamathelisi zonyango.

Iimpawu:I-Polyisobutylene ineempawu zeekhemikhali zee-hydrocarbon compounds ezigcweleyo, kwaye iqela le-methyl ye-side chain lisasazwa ngokulinganayo, eliyi-polymer eyahlukileyo. Imeko yokuhlanganiswa kunye neempawu ze-polyisobutylene zixhomekeke kubunzima bayo beemolekyuli kunye nokusasazwa kobunzima beemolekyuli. Xa ubunzima obuphakathi beemolekyuli bukwi-70000 ~ 90000, i-polyisobutylene iguquka ukusuka kulwelo olujikayo ukuya kwi-elastic solid. Ngokubanzi, ngokwesayizi yobunzima beemolekyuli ze-polyisobutylene yahlulwe ngolu luhlu lulandelayo: ubunzima obuphantsi beemolekyuli ze-polyisobutylene (ubunzima obuphakathi beemolekyuli = 200-10000); ubunzima obuphakathi beemolekyuli ze-polyisobutylene (ubunzima obuphakathi beemolekyuli = 20000-45,000); ubunzima obukhulu beemolekyuli ze-polyisobutylene (ubunzima obuphakathi beemolekyuli = 75,000-600,000); ubunzima obukhulu beemolekyuli ze-polyisobutylene (inani lobunzima obuphakathi beemolekyuli ezingaphezu kwe-760000).

1. Ukuqina komoya

Enye yeempawu ezibalaseleyo ze-polyisobutylene kukuxinana komoya okugqwesileyo. Ngenxa yokubakho kwamaqela amabini e-methyl atshintshiweyo, intshukumo ye-molecular chain iyacotha kwaye i-free volume incinci. Oku kubangela ukuba i-diffusion coefficient ibe sezantsi kwaye i-gas permeability ibe phezulu.

2. Ukunyibilika

I-Polyisobutylene iyanyibilika kwi-aliphatic hydrocarbon, i-aromatic hydrocarbon, ipetroli, i-naphthene, ioyile yeminerali, i-chlorinated hydrocarbon kunye ne-carbon monosulfide. Inyibilika kancinci kwi-alcohols kunye neetshizi eziphezulu, okanye ivuvukile kwi-alcohols, ii-ether, ii-monomers, ii-ketones kunye nezinye izinyibilikisi kunye neeoyile zezilwanyana nezemifuno, izinga lokudumba liyakhula ngokwanda kobude be-solvent carbon chain; Inganyibiliki kwi-alcohols ezisezantsi (ezifana ne-methanol, i-ethanol, i-isopropyl alcohol, i-ethylene glycol kunye ne-coethylene glycol), ii-ketones (ezifana ne-acetone, i-methyl ethyl ketone) kunye ne-glacial acetic acid.

3. Ukumelana neekhemikhali

I-Polyisobutylene ayimelani ne-asidi kunye ne-alkali. Ezifana ne-ammonia, i-hydrochloric acid, i-60% ye-hydrofluoric acid, isisombululo samanzi se-lead acetate, i-85% ye-phosphoric acid, i-40% ye-sodium hydroxide, amanzi anetyuwa eyomileyo, i-800} ye-sulfuric acid, i-38% ye-sulfuric acid +14% ye-nitric acid erosion, Nangona kunjalo, ayinakumelana nokutshatyalaliswa kwee-oxidants ezinamandla, ii-oxidants ezibuthathaka ezishushu (ezifana ne-60% ye-potassium permanganate), ezinye ii-acids ezishushu ezixineneyo (ezifana ne-373K acetic acid) kunye nee-halogens (i-fluorine, i-chlorine, intlango).

Ukupakisha: 180KG igubu

Indawo yokugcina: Gcina kwindawo epholileyo, enomoya, neyomileyo ekhuselwe lilanga ngexesha lokuthuthwa.

Ukuqukumbela, i-PIB yinto exabisekileyo enezicelo ezininzi kumashishini ahlukeneyo. Iimpawu zayo ezibalaseleyo zokutywina kunye nokuncamathelisa, kunye nokunyibilika kwayo kunye nokuguquguquka kwayo, kuyenza ifaneleke kakhulu kumashishini okuthambisa, ukhathalelo lomntu, ukutya, kunye nezonyango. Njengomthengisi ophambili we-PIB, sizinikele ekuboneleleni abathengi bethu ngeemveliso kunye neenkonzo ezikumgangatho ophezulu ukuhlangabezana neemfuno zabo kumashishini.