Polyisobutylene (PIB)

Polyisobutylene (PIB)ndi chinthu chopanda utoto, chosakoma, chosakhala ndi poizoni wandiweyani kapena wokhazikika, kukana kutentha, kukana kwa okosijeni, kukana kwa ozoni, kukana nyengo, kukana kwa ultraviolet, kukana asidi ndi alkali ndi mankhwala ena abwino.Polyisobutylene ndi isobutylene homopolymer yopanda mtundu, yopanda fungo, yopanda poizoni.Chifukwa cha njira zosiyanasiyana zokonzekera komanso luso laukadaulo, molekyulu ya Chemicalbook kuchuluka kwa polyisobutylene kumasiyana mosiyanasiyana.Zambiri zamamolekyulu azinthu zomwe zimafikira kupitilira 10,000 mpaka 200,000 zimasinthidwa kuchokera kumadzi amadzimadzi kupita ku semi-olimba, kenako ndikusinthira kukhala elastomer ngati mphira.Polyisobutylene imagonjetsedwa ndi asidi, alkali, mchere, madzi, ozoni ndi ukalamba, ndipo imakhala ndi mpweya wabwino kwambiri komanso kutsekemera kwamagetsi.

Chemical katundu:zopanda utoto mpaka zowala zachikasu zowoneka bwino zamadzimadzi kapena zotanuka rubbery semisolid (kuchepa kwa molekyulu ndi gelatinous yofewa, yolemera kwambiri yama cell ndi ductile ndi zotanuka).Zonse zopanda fungo, zopanda fungo kapena zonunkhira pang'ono.Kulemera kwa ma molekyulu ndi 200,000 ~ 87 miliyoni.Zosungunuka mu benzene ndi diisobutyl Chemicalbook, zimatha kusakanikirana ndi polyvinyl acetate, sera, ndi zina, zosasungunuka m'madzi, mowa ndi zosungunulira zina za polar.Zitha kupangitsa shuga wa chingamu kukhala wofewa kwambiri pakutentha kotsika, ndipo imakhala ndi pulasitiki inayake pa kutentha kwakukulu kuti ipangitse zofooka za polyvinyl acetate kukakhala kozizira, nyengo yotentha komanso kufewetsa kwambiri ikakumana ndi kutentha kwapakamwa.

Mapulogalamu:PIB imadziwika chifukwa cha kusindikiza kwake komanso zomatira, zomwe nthawi zambiri zimagwiritsidwa ntchito ngati zomatira, zokutira, ndi zomata.Makhalidwe ngati mphira a PIB amapangitsa kuti ikhale chisankho chabwino kwambiri chosindikizira ndikugwiritsa ntchito ma mgwirizano, chifukwa imathandizira kupereka mgwirizano wamphamvu komanso wokhazikika pamakonzedwe angapo.Kuphatikiza pakugwiritsa ntchito kwake, PIB imagwiritsidwa ntchito kwambiri muzodzoladzola ndi zinthu zosamalira anthu chifukwa champhamvu zake zosungunuka.Zinthuzi nthawi zambiri zimaphatikizidwa ndi zinthu zina kuti apange zinthu zokhala ndi mawonekedwe apadera komanso kumva.

PIB ilinso ndi ntchito zosiyanasiyana m'makampani azakudya.Mankhwalawa amagwiritsidwa ntchito ngati thickener, stabilizer, ndi emulsifier muzakudya zokonzedwa.PIB itha kuthandizanso kukonza kapangidwe kake komanso kusasinthika kwa zinthu monga ayisikilimu, chingamu, ndi zinthu zophika.Kusinthasintha kwa PIB kumapangitsa kuti ikhale yofunikira kwa opanga opanga zakudya.

PIB imagwiritsidwanso ntchito kwambiri m'makampani azachipatala.Zinthu zomwe sizili ndi poizoni zimapangitsa kuti zigwiritsidwe ntchito pazachipatala.Mankhwalawa amagwiritsidwa ntchito ngati stabilizer mu katemera, komanso mankhwala ambiri.PIB's hydrophobic chikhalidwe imathandiza kuti igwirizane ndi khungu, ndikupangitsa kuti ikhale yothandiza popanga zomatira zamankhwala.

Makhalidwe:Polyisobutylene imakhala ndi mankhwala a saturated hydrocarbon compounds, ndipo gulu la methyl lam'mbali limagawidwa molimba, lomwe ndi polima lapadera.Kuphatikizika kwake ndi katundu wa polyisobutylene zimadalira kulemera kwake kwa maselo ndi kugawa kwa maselo.Pamene mamasukidwe akayendedwe pafupifupi molekyulu kulemera ndi mu osiyanasiyana 70000 ~ 90000, polyisobutylene amasintha kuchokera kumadzi kutembenukira kukhala zotanuka olimba.Nthawi zambiri, malinga ndi kukula kwa maselo kulemera kwa polyisobutylene lagawidwa mu mndandanda zotsatirazi: otsika maselo kulemera polyisobutylene (chiwerengero pafupifupi maselo kulemera = 200-10000);Sing'anga molecular kulemera polyisobutylene (chiwerengero pafupifupi molekyulu kulemera = 20000-45,000);High molecular weight polyisobutylene (chiwerengero chapakati pa molekyulu = 75,000-600,000);Polyisobutylene (chiwerengero cholemera kwambiri cha molekyulu kuposa 760000).

1. Kuthina kwa mpweya

Chimodzi mwazinthu zodziwika bwino za polyisobutylene ndikulimba kwake kwa mpweya.Chifukwa cha kukhalapo kwa magulu awiri olowa m'malo a methyl, kuyenda kwa ma cell ndi pang'onopang'ono ndipo voliyumu yaulere ndi yaying'ono.Izi zimapangitsa kuti mpweya ukhale wochepa kwambiri komanso mpweya wabwino.

2. Kusungunuka

Polyisobutylene amasungunuka mu aliphatic hydrocarbon, onunkhira hydrocarbon, petulo, naphthene, mchere mafuta, chlorinated hydrocarbon ndi carbon monosulfide.Kusungunuka pang'ono mu mowa wapamwamba ndi tchizi, kapena kutupa mu mowa, ethers, monomers, ketoni ndi zosungunulira zina ndi mafuta a nyama ndi masamba, kuchuluka kwa kutupa kumawonjezeka ndi kuwonjezeka kwa zosungunulira mpweya unyolo kutalika;Zosasungunuka mu zakumwa zoledzeretsa (monga methanol, ethanol, isopropyl alcohol, ethylene glycol ndi coethylene glycol), ketoni (monga acetone, methyl ethyl ketone) ndi glacial acetic acid.

3. Kukana mankhwala

Polyisobutylene imalimbana ndi asidi ndi alkali.Monga ammonia, hydrochloric acid, 60% hydrofluoric acid, lead acetate aqueous solution, 85% phosphoric acid, 40% sodium hydroxide, saturated salt water, 800} sulfuric acid, 38% sulfuric acid +14% kukokoloka kwa nitric acid, sangathe kukana kukokoloka kwa oxidants amphamvu, oxidants otentha ofooka (monga 60% potaziyamu permanganate), otentha organic zidulo (monga 373K acetic acid) ndi halogens (fluorine, chlorine, chipululu).

Kunyamula: ng'oma ya 180KG

Kusungirako: Sungani pamalo ozizira, mpweya wabwino, malo owuma otetezedwa ndi dzuwa poyenda.

Pomaliza, PIB ndi chinthu chamtengo wapatali chokhala ndi ntchito zambiri m'mafakitale osiyanasiyana.Kusindikiza kwake kwabwino kwambiri komanso zomatira, komanso kusungunuka kwake komanso kusinthasintha kwake, kumapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito mkati mwa zodzoladzola, chisamaliro chamunthu, chakudya, ndi mafakitale azachipatala.Monga ogulitsa otsogola a PIB, tadzipereka kupatsa makasitomala athu zinthu ndi ntchito zapamwamba kwambiri kuti akwaniritse zosowa zamakampani awo.