Qhov txawv ntawm BPA thiab BPS yog BPA muaj cov pa roj carbon, hydrogen thiab oxygen atoms thaum BPS muaj carbon, hydrogen, oxygen, thiab sulfur.
BPA stands rau bisphenol A thiab BPS stands rau bisphenol S. Cov no yog cov organic tebchaw peb siv raws li reactants nyob rau hauv cov tshuaj tiv thaiv polymer. Bisphenol A kuj yog ib qho khoom pib rau kev sib txuas ntawm cov yas. Ob qho tshuaj no tshwm sim ua cov khoom tsis muaj xim tsis muaj kob.
BPA yog dab tsi?
BPA yog bisphenol A. Nws yog cov organic compound thiab yog cov khoom siv hluavtaws. Tsis tas li ntawd, cov tshuaj formula ntawm cov compound no yog (CH 3)2C(C6H 4OH)2 thiab nws yog diphenylmethane derivative. Ntxiv mus, nws muaj ob pawg hydroxyphenyl, uas ua rau nws poob rau hauv qeb ntawm bisphenols. Nws tshwm sim raws li cov khoom tsis muaj xim. Txawm hais tias nws tsis zoo soluble hauv dej, nws yog soluble hauv cov kuab tshuaj organic. Tsis tas li ntawd, qee qhov lwm yam tshuaj muaj tseeb txog qhov sib xyaw no muaj raws li hauv qab no:
- Molar mass yog 228.291 g/mol
- Tshuaj raws li cov khoom dawb
- Density yog 1.20 g / cm3
- Melting point ranges ntawm 158 txog 159 ° C
- kub taw tes yog 220 °C
Daim duab 01: Kev tsim cov BPA
BPA yog cov khoom pib rau kev tsim cov yas. Feem ntau, nws muaj txiaj ntsig zoo rau kev tsim cov polycarbonates, epoxy resins, polysulfones, thiab lwm yam. Tsis tas li ntawd, qhov sib xyaw no yog tsim los ntawm kev siv lub condensation ntawm acetone. Ntawm no, cov tshuaj tiv thaiv no yuav tsum muaj ob qhov sib npaug ntawm phenol thiab cov kua qaub uas muaj zog ua lub zog.
BPS yog dab tsi?
BPS yog bisphenol S. Nws yog cov khoom siv hluavtaws organic. Tsis tas li ntawd, nws cov tshuaj formula yog (HOC6H4)2SO2Txawm hais tias muaj kev sib raug zoo ntawm BPA thiab BPS, lawv txawv ntawm ib leeg nyob ntawm cov qauv tshuaj. Qhov ntawd yog; hauv BPS, ib pab pawg sulfone tau hloov cov dimethylmethylene pawg BPA. Ntxiv mus, qee qhov ntawm nws cov ntsiab lus tshuaj muaj raws li hauv qab no:
- Molar mass yog 250.27 g/mol
- Tshuaj dawb / xim tsis muaj xim
- Density yog 1.366 g / cm3
- Melting point ranges ntawm 245 txog 250 ° C
- Forms zoo li tus siv lead ua hauv dej
Daim duab 02: BPS Production
BPS yog qhov tseem ceeb ua ib feem hauv kev kho kom qhuav epoxy kua nplaum. Ntxiv mus, nws yog ib qho tseem ceeb raws li ib tug corrosion inhibitor. Sib nrug ntawm qhov ntawd, peb siv nws ua cov tshuaj tiv thaiv hauv cov tshuaj tiv thaiv polymer, piv txwv li ib lub tsev thaiv hauv polycarbonates thiab qee cov epoxies. Peb tuaj yeem tsim cov tshuaj no los ntawm cov tshuaj tiv thaiv ntawm sulfuric acid thiab phenol.
Qhov txawv ntawm BPA thiab BPS yog dab tsi?
BPA sawv cev rau bisphenol A thaum BPS yog bisphenol S. Qhov sib txawv tseem ceeb ntawm BPA thiab BPS yog BPA muaj carbon, hydrogen thiab oxygen atoms where BPS muaj carbon, hydrogen, oxygen, thiab sulfur. Tsis tas li ntawd, lwm qhov sib txawv ntawm BPA thiab BPS yog BPA muaj cov pab pawg dimethylmethylene thaum BPS muaj sulfone pawg.
Cov infographic hauv qab no nthuav tawm qhov sib txawv ntawm BPA thiab BPS kom ntxaws ntxiv.
Summary – BPA vs BPS
Ob leeg BPA thiab BPS yog hom bisphenol. BPA yog bisphenol A thaum BPS yog bisphenol S. Qhov sib txawv tseem ceeb ntawm BPA thiab BPS yog BPA muaj carbon, hydrogen thiab oxygen atoms whereas BPS muaj carbon, hydrogen, oxygen, thiab sulfur.
