Hnub no, polystyrene yog ib qho ntawm cov khoom xav tau tshaj plaws hauv kev tsim kho. Cov neeg tsim khoom thiab cov tswv ntawm thaj chaw hais lus zoo ntawm nws txoj kev nyab xeeb thiab tus nqi qis. Styrofoam muaj nuj nqis raws li lub tshuab cua sov. Yog tias peb suav nrog txhua qhov zoo ntawm polystyrene nthuav dav (cov khoom pib ua npuas dej), peb tuaj yeem hais txog cov yam ntxwv tseem ceeb ntawm cov khoom ntxeem tau.
Polyfoam. Cov yam ntxwv ntawm kev ua haujlwm thiab kev ua haujlwm
- Styrofoam yog dab tsi? Qhov no yog huab cua nyob rau hauv kaw hlwb ua los ntawm nthuav polystyrene. Xws li cov qauv txiav txim siab ib qho ntawm qhov xav tau tshaj plaws thiab cov khoom tseem ceeb ntawm cov khoom - tsis tshua muaj thermal conductivity. Ua npuas ncauj piv rau dab tsi? Cov yam ntxwv ntawm nws cov thermal conductivity yuav luag 20 npaug qis dua li ntawm lub cib, peb zaug qis dua ntoo. Ib txheej ntawm 12-centimeter ua npuas ncauj khaws cov cua sov kom zoo li cov phab ntsa cib 2 meters tuab. Nyob rau tib lub sijhawm, nws tsis hnov tsw ntawm qhov kub thiab txias.
- Styrofoam ua dab tsi ntxiv? Cov yam ntxwv ntawm nws cov dej tsis kam mus kom ze 100%. Muaj kev paubNws tau raug tsim los ntawm cov phab ntsa yas ua npuas ncauj tuaj yeem nqus tsis ntau tshaj 3% (ntawm nws tus kheej qhov hnyav) ntawm cov dej noo. Nyob rau tib lub sijhawm, nws yuav tsis o, yuav tsis hloov nws cov duab lossis nws qhov ntev. Styrofoam ceev yuav tsis hloov.
Lwm yam khoom ua npuas ncauj
- Xav tau lub suab nrov zoo? Tib lub npuas yas yuav zoo kawg nkaus tiv nrog lub luag haujlwm no. Nws cov yam ntxwv raws li cov khoom siv uas tiv thaiv lub tsev los ntawm cua thiab tsis txhob tso suab nrov vim yog cov qauv. Cov khoom siv cua ntxeem tau muaj txiaj ntsig ntau dua li lwm cov suab rwb thaiv tsev, zoo dua li cov yeeb yaj kiab windproof. Tag nrho 3 cm ntawm ua npuas ncauj thaiv tawm cov suab nrov sab nraud.
- Dab tsi ntxiv yog Styrofoam zoo rau? Yooj yim ntawm installation. Lub teeb hauv qhov hnyav, yooj yim rau kev txiav, tsis tawm cov pa phem, cov khoom siv tuaj yeem sib sau ua ke rau hauv qhov xav tau tsim txawm tias los ntawm ib tus neeg. Rau nws cov installation tsis xav tau cov cuab yeej tshwj xeeb lossis cov khoom siv tshwj xeeb. Nws tsis tsim plua plav thaum txiav, nws yooj yim rau laum.
Polyfoam. Chemical Properties
Yog tias koj xav tau cov khoom nruab nrab thiab ruaj khov, mus nrog Styrofoam. Cov yam ntxwv ntawm nws cov tshuaj muaj pes tsawg leeg ua kom ntseeg tau tias tsis muaj kab mob los yog kab mob los yog kab mob phem tuaj yeem nyob hauv nws.
Nws tsis ntshai kev lwj thiab tsis muaj qhov cuam tshuam rau pwm. Cov qauv ntawm cov npuas dej ua rau nws nruab nrab rau feem ntau cov tshuaj. Nws tsis ntshai tsis tsuas yog noo noo: ua npuas ncauj yog indifferent rau feem ntau aggression tshuaj. Ua npuas ncauj yas tsis cuam tshuam nrog txiv qaub lossis cement. Lawv tsis tuaj yeem yaj nrog xab npum lossis pleev xim -Lawv tiv taus rau feem ntau cov kua qaub thiab cov ntsev ntsev. Qhov tsuas yog ua npuas ncauj ua los ntawm polystyrene ntshai yog cov kuab tshuaj raws li benzene lossis acetone. Cov tom kawg tuaj yeem ua kom yaj ib nrab ua npuas dej. Thaum kub nce, cov npuas npuas pib yaj, yog li nres smoldering: cov npuas dej tsis txhawb kev combustion lossis smoldering. Tsuas yog nyob rau hauv kev sib cuag nrog hluav taws, nws ignites, tab sis tom qab 4 vib nas this nws tawm mus. Thaum kawg, cov npuas dej yog tsim los ntawm cov ntaub ntawv zoo ib puag ncig, thiab nws cov khoom pov tseg tsuas yog muaj kev nyab xeeb: tsis muaj cov tshuaj phem tawm. Tias yog vim li cas polystyrene, uas nws cov yam ntxwv tsuas yog zoo, yog siv tsis tau tsuas yog nyob rau hauv kev tsim kho, tab sis kuj nyob rau hauv zus tau tej cov me nyuam cov khoom ua si thiab tha xim sab hauv.
