Phthalic anhydride CAS 85-44-9 Yogwiritsidwa ntchito popanga utomoni wa polyester wosaturated
Chiyambi cha malonda
Anhydride ya Phthalic, yomwe imadziwika kuti phthalic anhydride, ndi chinthu chofunikira kwambiri chachilengedwe. Ndi mankhwala oletsa kutentha omwe amagwiritsidwa ntchito popanga mphira wachilengedwe, mphira wa isoprene, mphira wa butadiene, mphira wa styrene-butadiene, ndi mphira wa nitrile, zomwe zimaletsa kutentha kwambiri komanso zimawonjezera chitetezo cha ntchito. Sizimakhudza kwambiri nthawi yovunda komanso kukalamba kwa chinthu chomalizidwa.
Anhydride ya phthalic, ikagwiritsidwa ntchito limodzi ndi sodium carbonate mu mankhwala opangira thovu othamanga kwambiri, imatha kuwonjezera mphamvu ya thovu. Kugwiritsa ntchito kwakukulu kwa anhydride ya phthalic ndi gawo lachilengedwe popanga mapulasitiki, zokutira, ndi ma resins a polyester osakhuta.
Phthalic anhydride ndi chinthu chogwiritsidwa ntchito kwambiri chochiritsira utomoni wa epoxy chomwe chimachokera ku anhydride. Ndi chotsika mtengo, chimapanga kutentha pang'ono panthawi yochiritsira, ndipo chimagwiritsidwa ntchito makamaka pakupanga zinthu zazikulu ndi zomatira. Chogulitsachi chochiritsira chimakhala ndi mphamvu zamagetsi komanso mphamvu zamakanika, komanso chimalimbana bwino ndi mankhwala.
Munda wofunsira
Phthalic anhydride ndi imodzi mwa zinthu zofunika kwambiri zopangira mankhwala achilengedwe. Zinthu zake zazikulu ndi monga dibutyl phthalate, dioctyl phthalate, ndi diisobutyl phthalate, zomwe zimagwiritsidwa ntchito ngati mapulasitiki mu PVC ndi zinthu zina. Ingagwiritsidwenso ntchito popanga ma unsaturated polyester resins, alkyd resins, utoto ndi utoto, utoto wosiyanasiyana, zowonjezera chakudya, laxative phenolphthalein mu mankhwala, ndi mankhwala ophera tizilombo monga phosmet, metribuzin, ndi sodium saccharin.
Kufotokozera za zomangamanga
Nambala ya CAS 85-44-9
Fomula ya Maselo: C8H4O3
Kulemera kwa maselo: 148.12
EINECS Nambala 201-607-5
Malo osungunuka 131-134°C (lit.)
Malo otentha 284°C (lit.)
Kuchuluka kwa zinthu 500-700 kg/m³ Kuchuluka kwa zinthu 1.53 g/cm³
Kuchuluka kwa nthunzi 5.1 (motsutsana ndi mpweya)
Kuthamanga kwa nthunzi <0.01 mmHg (20°C)
Malo owunikira 152°C
Malo osungiramo zinthu Sungani pansi pa +30°C.
Kusungunuka kwa 6 g/L (kuwola pang'onopang'ono).
Kuchuluka kwa asidi (pKa) 2.97 [pa 20°C]
Maonekedwe a makristasi a Platy
Mtundu Woyera
Kusungira ndi mayendedwe
Kulongedza: malinga ndi zofunikira za makasitomala
Kusunga: Sungani pamalo ouma, amdima komanso opumira mpweya.
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