Asiti Terephthalic: lik'hemik'hale thepa, ho lokisetsa le ho sebelisa le

baemeli ba ea bohlokoa ea metsoako polycarboxylic nkhang hamonate ke phthalic derivatives acid e emeloang ke itseng isomers - ortho-isomer (ka ho toba, acid e phthalic), Meta-isomer (isophthalic acid) le le para-isomer (terephthalic). Kaofela ha sehlopha see sa dintho haholo ho pharaletseng sebediswa masimong a sa tšoaneng liindasteri.

Terephthalic acid e - e hloekileng colorless bonaletsang phofo fumana ka itšoara joang mokelikeli mohato ho kena moea oa paraxylene ka ho ba teng ha matsoai cobalt projecting etswa ha. The sebelisana tsa ntho e le mefuta e fapaneng ya alcohols isang sebopeho sa lik'hemik'hale metsoako e Ester sehlopha. Kholo ka ho fetisisa e sebetsang kopo e dimethyl terephthalate.

Terephthalic acid e ke hape ho tshwanetseng bakeng sa tswakana polyethylene terephthalate (PET) - e sebeletsang pepeneneng mocheso manganga polymer fumanoa ka ho polycondensation itsoara joang ka ea lithethefatsi le ethylene glycol. Ebe ho tloha le lihlahisoa libotlolo tsa polasetiki, likhoele poliester terilenovoy Group, molemo tsebahalang tlas'a lebitso "poliester", hammoho le mefuta e fapaneng ya ditshelo ambalaji tsa indasteri ea lijo, dikarolo tsa elektronike le mefuta e sa tšoaneng ea thepa.

Ho ea ka thepa bona lik'hemik'hale tšoanang le terephthalic acid e monocarboxylic komponeng. O ile a ka futhumatsang kapa le tlas'a tšusumetso ea, seo ho thoeng ke ke metsi mmeleng dintho habonolo bopa matsoai, esters, e rarahaneng sebopeho ea limolek'hule, anhydrides, amides, tse kang lihlopha le 'ngoe kapa tse peli carboxyl. Terephthalic acid e hape kena ho esterification itšoara joang, ka lebaka la tseo mono- le diesters ba thehoa. Holim 'a futhumatsang ea lintho tse bonahalang bonaletsang ho mocheso le ha likhato tse ka tlaase ho makholo a mabeli o ile a re decarboxylation ho fana ka metsoako e nang le palo e fokolang haholo ea lihlopha carboxyl. Leha ho le joalo, ba itšoara joang ka electrophilic tloswa ho ntsha lesale qala ho tswela pele ka thata haholo.

asiti Phthalic tlhaho a fumanoa ka pigment tala ea limela le pods Poppy peo. Ea derivatives lona ke bohlokoa ka ho fetisisa metsoako dibutyl phenylate le dimethyl phthalate, tse sebelisoa e le plasticizers tsa lihlahisoa selulose, vinyl polymers le rubbers. Hape, dimethyl, diethyl le dibutyl phthalate ke metsoako ea bohlokoa ea repellents fapaneng.

asiti Isophthalic ho pharaletseng sebelisoa ka tlhahisong ea unsaturated halogenated poliester. Kaha isophthalates ke plasticizers babatsehang. Leha ho le joalo, ka kopo e khōlō ea sehlopha benzenepolycarboxylic tsa metsoako e na le asiti e-s'o terephthalic, e leng e sebediswa bakeng sa tswakana ya dintho bohlokoa bakeng sa ho indasteri e ka nhua polyethylene terephthalate le dimethyl terephthalate. Di sebediswa bakeng sa tlhahisong ea mabanta tsa mekgwa e fapaneng, liropo, mabanta conveyor, matlooa a ho tšoasa litlhapi, liseile, rigging, trawls, peterole le hoses nefteustoychivyh, fasteners "lehalima", liletsa tse likhoele ea rackets tenese, 'me tse ling tse ngata. Ho feta moo, le boreleli khoele Textile oo tlhahiso ea lithethefatsi a sebelisa, ya hlahiswa jerseys, tse fapa-fapaneng dinama tse nyenyane tse (crepe, tweed, satin, joalo-joalo), likharetene dihlahiswa, raincoat, sekhele le moaparo thepa, lihempe, stockings, liaparo tsa bana joalo-joalo

Qetellong, re lokela ho hlokomela hore e acid e benzenepolycarboxylic letoto la lihlooho tsohle ke lintho tse mabifi haholo le nang le chefo e. Ka lebaka leo, kamehla e khomaretse le Boitsebiso bo Safety Data Sheet, e thathamisa thepa kaofela le lintho tse khethollang ho kompone, hammoho le ka mokhoa o le melao bakeng sa ho sebetsa le bona.