Txhab polystyrene: yam ntxwv, zoo, cov disadvantages

Hais txog caum xyoo dhau los, ib lub tsev tshiab cov ntaub ntawv uas hu ua polystyrene. Nta nws nyob deb surpassed ntau paub los ntawm lub sij hawm lub rwb thaiv tsev. PPP lub koob meej loj hlob nyob rau hauv geometric kev vam meej. Niaj hnub no, qhib thiab tsim tshiab zoo heev rau insulating cov ntaub ntawv, tab sis PPP, zoo dua lub npe hu rau peb raws li ib tug ua npuas ncauj (txawm hais tias ua npuas ncauj thiab polystyrene yog ua nyob rau hauv ntau txoj kev), yog tseem yog ib qho ntawm qhov zoo tshaj plaws. Yuav ua li cas yog li ntawd attracted polystyrene tsev?

Khoom yam ntxwv thiab zoo

Qhov zoo tshaj plaws txoj kev uas yuav txuag zog - thaum tshav kub kub rwb thaiv tsev ntawm lub tsev. Nyob rau hauv thiaj li tsis mus "poob dej tuag hauv txoj kev" yuav tsum tau ib tug zoo sov tsev. Qhov yooj yim txoj kev uas yuav ua li no yog nrog ib tug pheej yig tab sis heev txhim khu kev qha PPP. Yas pellets, roj puv, txom nyem heev conductors ntawm tshav kub. Qhov no yuav pab kom nws nyob rau hauv lub tsev nyob rau hauv tag nrho cov huab cua extremes. Thermal rwb thaiv tsev txhab polystyrene yuav tau tiv thaiv kom txhob lub vaj tse los ntawm ib tug dhau heev lawm ntawm dej. PPP yog tsis ntshai ntawm ntxooj: txawm nyob rau hauv ib tug ob peb hnub nyob rau hauv cov dej, nws yuav luag tsis tau ntub dej. Polystyrene ua npuas ncauj, tus yam ntxwv uas yuav muab piv nrog ib tug natural tsob ntoo, muaj peev xwm "ua pa". Dej vapor permeability nws yog hais txog tib yam li hais tias ntawm cov laug cam los yog bricks, li ntawd, cov tub txawg yuav tsum tau mus insulate lub tsev ntawm cov ntaub ntawv no yog ib tug ua npuas ncauj. PPP tsis rot thiab tsis muab lub nceb, nws yog zoo kawg nkaus muffles suab, li ntawd, nws yuav siv tsis tsuas yog raws li ib tug rhaub, tab sis kuj raws li ib tug lub suab insulator. Yuav ua li cas lwm tus neeg yog nthuav styrofoam? Cov yam ntxwv ntawm nws cov nqe lus ntawm kev Science News for KIDS heev peculiar. Nws yeej tsis ntshai ntawm cov xim, ntsev, kua qaub (tsuas yog nitric thiab acetic), li ntawd, lub PPP yog siv nyob rau hauv qhov kev siv txhua txhia qhov chaw. Cov uas tsis muaj nqi ntawm cov khoom yog ua ke nrog nws nyob mus ib txhis (PPP tsis muaj, tsis deform nyob rau hauv txhua yam). Thaum lub tsev yog insulated siv PPP, koj yuav tsis nco qab txog nws: lub rhaub yuav tsis muaj hloov. PPP los nyob rau hauv hom sib txawv, tab sis nws yog tshwj xeeb tshaj yog nrov vuas ntawm styrofoam. Nws yuav muaj ntau qhov ntev (xws li 60x120, 50x100), li ntawd, builders yuav xaiv cov hom, uas yog yooj yim rau koj khiav lag luam. Ntawm cov hoob kawm, tus PPP, raws li zoo raws li txhua tsav txhua yam, muaj ib tug xov tooj ntawm drawbacks. Txawm li cas los, lawv yog me me hais tias cov plurality ntawm cua sov nrov tshaj plaws tseem tseem yog ib tug polystyrene.

Nta thiab disadvantages

• PPP kev ntshai ntawm benzene, dichloroethane thiab lwm yam kuab tshuaj.
• Lub ntxeem tau cov ntaub ntawv uas tej zaum ua ib tug nas burrows los yog ntau: lawv yog cov tseem heev fond ntawm tshav kub. Hem deb lub tsiaj yuav siv tshuaj npaj rau lawv.
• foam nws tus kheej cov. Nyob rau hauv thiaj li yuav txo nws flammability, manufacturers hnub no yog ntxiv rau cov nqaij nyoos khoom nplaim retardants - tshuaj uas tiv thaiv combustion. Tau nrog PPP siv lawv daim ntawv yog cim.
• PPP compression yog zoo taus, tab sis heev taus. Niaj hnub nimno technology tau pab kom daws tau qhov teeb meem. Extruded polystyrene yog muaj zog tshaj li niaj zaus, tab sis yog heev me ntsis ntxiv dua lub zog dhau mus. Tab sis cov tsis muaj ib tug zoo-ua tau hauj lwm cua system yog disappearing.

Koj puas xav tau ib tug pheej yig tab sis kev zoo siab thiab sov lub tsev rau ib ntev lub sij hawm? Xaiv polystyrene. Koj muaj peev xwm tsis mus tsis ncaj ncees lawm.