Qhov Tseem Ceeb Qhov txawv - Polypropylene vs Polycarbonate
Polypropylene thiab polycarbonate yog ob qho tib si siv cov thermoplastic elastomers lossis cov ntaub ntawv yas vim lawv cov khoom sib xyaw tshwj xeeb. Qhov sib txawv tseem ceeb ntawm polypropylene thiab polycarbonate yog tias polypropylene muaj aliphatic hydrocarbon chains, whereas polycarbonate muaj cov ntxhiab hydrocarbon chains. Qhov sib txawv no tau coj cov polymers kom tau txais cov txheej txheem sib txawv ntawm lub cev thiab cov khoom siv kho tshuab.
YPolypropylene (PP) yog dab tsi?
Polypropylene yog cov organic polymer ua los ntawm propylene los ntawm cov tshuaj tiv thaiv catalytic. Nws yog thawj zaug tsim los ntawm G. Natta hauv 1954 thaum xav txog cov haujlwm dhau los ua los ntawm K. Ziegler. Cov pab pawg methyl txuas rau txhua qhov thib ob ntawm cov pa roj carbon polymer ntawm polypropylene.
Daim duab 01: Polymerization ntawm propylene
Polypropylene yog ib lub npe nrov thermoplastic elastomer uas muaj qhov kub thiab txias tiv taus. Polypropylene yog siv rau kev tsim cov tais, funnels, fwj, carboys, pails thiab ntsuas hub uas yuav tsum tau sterilized ntau zaus thiaj li yuav siv tau nyob rau hauv qhov chaw kho mob. Tsis tas li ntawd, nws muaj cov khoom siv zoo heev xws li kev qaug zog zoo, tshuaj lom neeg zoo thiab ib puag ncig kev ntxhov siab tawg ua haujlwm, zoo detergent kuj, siab hardness, yooj yim ntawm kev ua los ntawm kev txhaj tshuaj molding thiab extrusion. Polypropylene yog cov khoom lag luam siab ntim elastomer. Thaum muab piv cov foams ntawm polyethylene, polyurethane, thiab polystyrene, polypropylene foams muab cov khoom siv tau ntawm tus nqi qis tsis zoo li lwm yam. Xws li cov khoom muaj xws li kev thauj khoom muaj peev xwm zoo dua, ua kom yooj yim dua thiab cuam tshuam lub zog (vim qhov kub hloov pauv iav qis). Polypropylene zaj duab xis yog ib qho ntawm cov khoom ntim saum toj kawg nkaus hauv ntiaj teb vim nws qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Nws yog siv dav hauv kev lag luam ntim khoom noj (yuav luag 90% ntawm tag nrho PP zaj duab xis ntau lawm) thiab ua cov khoom ntim rau luam yeeb, textiles thiab khoom siv ntawv sau. Reinforced thiab ntim polypropylene yog siv rau kev tsim cov rooj tog zaum, tsheb thiab cov khoom siv hluav taws xob.
Daim duab 02: Cov khoom ua los ntawm Polypropylene
Qhov tsis zoo ntawm polypropylene muaj xws li pwm shrinkage ntau dua, txo qhov cuam tshuam lub zog, thiab ntau dua thermal expansion, tshwj xeeb tshaj yog nyob rau hauv sub-ambient kub, tsis zoo li lwm yam loj thermoplastic elastomers xws li PVC thiab ABS. Lwm yam khoom ntawm PP muaj xws li cov nplaum nplaum tsis zoo thiab cov kuab tshuaj sib txuas, cov nplaim hluav taws tsis zoo, tsis muaj pob tshab, tsis muaj hnav tsis kam, thiab tsis tshua muaj zog rau gamma hluav taws xob. PP tsis muaj kev phom sij rau kev noj qab haus huv, tab sis nws tuaj yeem tso tawm cov kab mob carcinogenic volatile organic compounds (VOCs) thaum ua haujlwm kub. Nws tseem paub txog nws cov biodegradability tsawg heev.
YPolycarbonate yog dab tsi?
Polycarbonate yog siv dav siv thermoplastic elastomer rau ntau yam khoom vim nws cov khoom sib xyaw tshwj xeeb, uas tsis pom muaj lwm yam khoom siv xws li hlau, iav lossis lwm yam yas. Xws li cov khoom muaj xws li zoo heev cuam tshuam lub zog, kub ua hauj, inherent nplaim retardance, yooj yim ntawm cov txheej txheem, thiab clarity. Vim tias qhov sib xyaw ua ke ntawm cov khoom no, polycarbonate tau siv dav hauv ntau qhov kev lag luam nrog rau cov khoom siv, tsheb, cov khoom lag luam, cov khoom siv hluav taws xob thiab hluav taws xob, teeb pom kev zoo, khoom siv kho mob, khoos phis tawj, thiab khoom siv thauj khoom.
Daim duab 03: Kev sib xyaw ntawm Polycarbonate
Polycarbonate muaj linear polyester ntawm carbonic acid nyob rau hauv uas dihydric phenolic pawg txuas nrog los ntawm carbonate pawg. Polycarbonates yog tsim los ntawm bis-phenol A thiab phosgene los ntawm ob qho tib si aqueous emulsion los yog nonnaqueous kua polymerization. Qhov sib ntxiv ntawm me me ntawm polyhydric phenols tuaj yeem txhim kho lub zog yaj, nplaim hluav taws, thiab lwm yam khoom. Polycarbonate yog incompatible nrog muaj zog alkaline daws thiab yog soluble nyob rau hauv chlorinated hydrocarbons. Ntxiv mus, nws yog insoluble nyob rau hauv aliphatic hydrocarbons. Ob lub hom phiaj dav dav thiab qib tshwj xeeb polycarbonates muaj nyob hauv khw.
Qhov txawv ntawm Polypropylene thiab Polycarbonate yog dab tsi?
YPolypropylene vs Polycarbonate |
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| Polypropylene yog cov organic polymer ua los ntawm propylene los ntawm cov tshuaj tiv thaiv catalytic. | Polycarbonate yog cov thermoplastic elastomer tsim los ntawm cov tshuaj tiv thaiv ntawm Bisphenol A thiab phosgene. |
| Nature ntawm Hydrocarbon Polymer | |
| Methyl pawg tau txuas rau txhua qhov thib ob carbon ntawm cov saw hlau polymer; Yog li ntawd, nws yog aliphatic hydrocarbon. | Hydrocarbon yog linear polyester ntawm carbonic acid nyob rau hauv uas dihydric phenolic pawg txuas nrog los ntawm carbonate pawg; Yog li ntawd, nws yog polyaromatic hydrocarbon. |
| Polypropylene yog tsim los ntawm propylene nrog kev siv Ziegler-Natta catalyst | Polycarbonate yog tsim los siv bisphenol A thiab phosgene los ntawm aqueous emulsion lossis non-aqueous tov polymerization. |
| khoom | |
| zoo kub tsis kam, zoo qaug zog, zoo tshuaj thiab ib puag ncig kev nyuaj siab tawg kuj, zoo detergent kuj, siab hardness, yooj yim ntawm kev txhaj tshuaj molding thiab extrusion yog nws cov khoom. | Kub ua haujlwm, qhov hluav taws kub hauv qhov hluav taws xob, kev yooj yim ntawm cov txheej txheem, thiab qhov tseeb yog cov khoom ntawm polycarbonate. |
| Polypropylene tsis tshua kim dua piv rau polycarbonate. | Polycarbonate yog tus nqi ntau dua li polypropylene. |
| Ib puag ncig lub zog | |
| Lub zog muaj zog tsawg. | Ib puag ncig lub zog siab. |
| Cov Khoom Siv Loj | |
| Polypropylene yog dav siv los ua cov khoom ntim. | Polycarbonate tau dav siv los ua cov khoom siv hluav taws xob thiab hluav taws xob thiab khoom siv. |
Summary – Polypropylene vs Polycarbonate
Polypropylene yog tus nqi qis thermoplastic elastomer, uas muaj aliphatic hydrocarbon chains thiab feem ntau yog siv rau hauv kev lag luam ntim vim nws muaj zog tiv taus, tshuaj zoo thiab ib puag ncig kev ntxhov siab tawg, tsis tshua muaj siab, thiab yooj yim ntawm kev ua. Polycarbonate yog ib qho ntawm cov khoom siv dav siv ntau tshaj plaws uas muaj cov hlua poly-aromatic hydrocarbon chains. Polycarbonate feem ntau yog siv rau hauv hluav taws xob thiab hluav taws xob, thiab kev lag luam tsheb, vim nws cov kev cuam tshuam siab tiv taus, qhov hluav taws kub retardance thiab yooj yim ntawm cov txheej txheem. Qhov no yog qhov txawv ntawm polypropylene thiab polycarbonate.
Download PDF Version ntawm Polypropylene vs Polycarbonate
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv ntawm Polypropylene thiab Polycarbonate.
