2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Polyvinylidene, lossis PVDC, tau tshawb pom los ntawm kev sib tsoo hauv 1933, los ntawm Ralph Wiley tus tub ntxhais kawm qib siab ua haujlwm ntawm Dow. Lub npe Saran tau ua lag luam los ntawm Dow Chemical hauv xyoo 1940, tab sis tam sim no tau dhau los ua ib lub npe siv rau cov yas nyias nyias siv los npog cov zaub mov.
Thaum twg yog polyvinyl chloride tsim?
Polyvinyl chloride yog cov yas uas zoo dua lub npe yas. Nws kuj tseem paub los ntawm lub npe PVC. Thawj zaug pom hauv 1835, nws tau siv cov kws tshawb fawb dhau cuaj caum xyoo los nrhiav kev siv rau cov khoom no.
Leej twg tsim polyvinylidene chloride?
Ralph Wiley nrhiav pom polyvinylidene chloride polymer hauv xyoo 1933. Nws yog ib tug tub ntxhais kawm ntawv qib siab uas ua haujlwm ib nrab hnub ntawm Dow Chemical lab ua lub tshuab ntxuav tais diav. Thaum ntxuav chav kuaj iav, nws tuaj hla lub vial nws tsis tuaj yeem txhuam kom huv.
polyvinylidene chloride ua li cas?
Polyvinylidene chloride (PVDC), cov khoom siv hluavtaws ua los ntawm polymerization ntawm vinylidene chloride. Nws yog siv feem ntau hauv cov ntaub ntawv ntshiab, hloov tau, thiab impermeable yas zaub mov qhwv.
Saran tau tsim thaum twg?
Nyob rau hauv 1933, Ralph Wiley, tus neeg ua haujlwm hauv chaw kuaj mob ntawm Dow tshuaj tshawb pom cov ntaub qhwv yas los ntawm kev sib tsoo thaum nws tab tom ntxuav cov cuab yeej kuaj thiab pom ib zaj duab xis hauv ib lub vial tsis tuaj. Zaj duab xis yog polyvinylidene chloride.
Pom zoo:
Puas tau pom zoo lossis tau pom zoo?
"Tau pom zoo" yog tam sim no zoo meej, tsis yog tam sim no nce qib (uas yuav yog "kev pom zoo" - qhia tias "kev pom zoo" tam sim no tab tom ua). Puas tau pom zoo txhais? 1: kom muaj lossis nthuav tawm qhov kev pom zoo tsis tuaj yeem pom zoo li kev coj ua.
Thaum twg tau txais kev pom zoo nrhiav tau?
In 2009, peb tus tsim thiab CEO Steve Marshall tau txheeb xyuas lub sijhawm hauv kev lag luam pov hwm lub neej thiab Reassured tau tsim. Peb pab tsev neeg tiv thaiv qhov tseem ceeb tshaj plaws rau lawv; Peb Lub Hom Phiaj rau 2020 yog los tiv thaiv ntau dua 200,000 tsev neeg hauv tebchaws Askiv.
Thaum twg cov ntaub ntawv pom pom tau tsim?
In 1644, Michael Florent Van Langren, tus kws tshawb fawb Flemish, ntseeg tias tau muab thawj qhov pom kev sawv cev ntawm cov ntaub ntawv txheeb cais. Leej twg invented data visualization? Lub xyoo 1960 thiab 1970 tau pom qhov tshwm sim ntawm cov kws tshawb fawb xws li John W.
Puas yog polyvinylidene chloride yog tshuaj?
Polyvinylidene chloride (PVDC), cov khoom siv hluavtaws ua los ntawm polymerization ntawm vinylidene chloride. Nws yog siv feem ntau hauv cov ntaub ntawv ntshiab, hloov tau, thiab impermeable yas ntim khoom noj. Saran tau qhia los ntawm Dow Chemical Company hauv xyoo 1939 thiab tseem yog cov khoom siv pob tshab pob tshab.
Puas tau pom Mauxe lub ntxa puas tau pom?
Mauxes tau hais tias tau tuag hauv Mount Nebo, Jordan. Raws li Vajluskub hais, qhov chaw tseeb ntawm Mauxes lub ntxa tseem tsis paub, txhawm rau tiv thaiv kev pe mlom. Lub ntxa ntawm Aaron, nyob rau hauv Mount Harun, ze Petra, Jordan. Adas thiab Eva faus nyob qhov twg?
