Acid Terephthalic: meatotino vailaau, o le sauniuniga ma le talosaga

Taua o le sui o le tuufaatasi o ituaiga laau manogi polycarboxylic e phthalic pogai acid sui isomers nisi - ortho-isomer (tuusao, acid phthalic), meta-isomer (acid isophthalic) ma para-isomer (terephthalic). o lenei vaega o mea uma lava lautele faaaogaina i fanua tau alamanuia eseese.

Terephthalic acid - efuefu crystalline colorless mama maua i le tali oxidation vaega faasuavaia o paraxylene i le afioaga o le masima cobalt projecting catalysts. O fegalegaleaiga o le mea ma se o alcohols eseese tau atu i le tuufaatasi i le faavaega o vailaau le vaega ester. O le aupito tele talosaga aogā o dimethyl terephthalate.

acid Terephthalic e talafeagai foi mo le tuufaatasia o terephthalate polyethylene (Pete) - a polymer tetee-vevela manino maua e ala i le tali polycondensation o le mea ma glycol ethylene. Ona mai ai fua fagu palasitika, alava polyester terilenovoy Vaega, e sili iloa i lalo o le igoa "polyester", faapea foi ma se pusa tele o pusa mo le gaosiga o meaai, vaega ma ituaiga eseese faaeletoroni o meafaigaluega.

Tusa ma o latou meatotino vailaau tutusa terephthalic lotoa monocarboxylic acid. O ia i le faʻavevela po oi lalo o le uunaiga a, o lea ua taʻua vave avea ma mea dehydrating masima, esters, lavelave fausaga molecular, anhydrides, amides, e pei o se tasi pe lua ni vaega carboxyl. acid Terephthalic foi e ulufale atu i le tali esterification, o se taunuuga o lea ua faia le mono- ma diesters. I le faʻavevela o le crystalline mea i se vevela e lē itiiti ifo i lo le lua selau tikeri matauina decarboxylation e tuuina atu tuufaatasi o loo i ai se fuainumera itiiti o vaega carboxyl. Ae peitai, o le tali i le mama deactivate suia electrophilic amata ona faagasolo ma faigata tele.

acid Phthalic maua masani i le lanu meamata o laau ma pods fanau Poppy. O lona pogai e sili ona Eteru dibutyl tuufaatasi taua ma dimethyl phthalate, lea o loo faaaogaina e pei plasticizers o oloa cellulose, polymers ma rubbers vinyl. Foi, dimethyl, diethyl ma dibutyl phthalate, o vaega taua o le repellents eseese.

ua lautele faaaogaina acid Isophthalic i le gaosia o unsaturated resins polyester. Talu isophthalates e plasticizers lelei. Ae peitai, o le talosaga sili o vaega benzenepolycarboxylic o tuufaatasi e lei acid terephthalic, lea e faaaogā mo le tuufaatasia o mea taua mo le alamanuia o polyethylene terephthalate ma dimethyl terephthalate. o loo faaaogaina mo le gaosia o le fusipaʻu o auala eseese, maea, fusipaʻu conveyor, upega fagota, sails, rigging, trawls, penisini ma faagaau nefteustoychivyh, fasteners "uila", manoa o rackets tenisi, ma sili atu. Lē gata i lea, o le vulu lavalava lamolemole lea tuuina atu o le mea masani, e gaosia jerseys, eseese pepa solo (crepe, tweed, satin, ma isi), pupuni oloa, raincoat, mea faamalu ma teuga, ofutino, o totini, lavalava a tamaiti ma isi tulaga faapena

I le faaiuga, e tatau ona matauina ai mea e matua faigata faasologa acid benzenepolycarboxylic uma ma oona. O le mea lea, ua pea faapipii atu i le Pepa Mea Saogalemu faamaumauga, lea o loo lisi ai meatotino uma ma uiga o le lotoa, faapea foi ma le taualumaga ma tulafono mo le galulue faatasi ma i latou.