Qhov Tseem Ceeb Qhov txawv - HDPE vs PP
HDPE yog polyethylene high-density thaum PP yog polypropylene. Yog li qhov sib txawv tseem ceeb ntawm HDPE thiab PP yog tias HDPE yog tsim nrog ethylene monomer whereas PP yog tsim nrog propylene monomer.
Polymers yog macromolecules tsim los ntawm ntau lub me me molecules hu ua monomers. Muaj ntau ntau yam sib txawv ntawm cov polymers raws li hom monomer thiab txoj kev ntawm cov monomers khi rau ib leeg.
YHDPE yog dab tsi?
HDPE yog polyethylene high-density. Nws yog ib daim ntawv ntawm polyethylene. HDPE kuj yog cov khoom siv thermoplastic uas yog tsim los ntawm cov roj av. Cov tshuaj formula ntawm ib chav tsev rov qab ntawm cov compound no yog –C2H4-. HDPE yog nrov heev vim nws lub zog siab-rau-qhov sib piv. Qhov no txhais tau tias HDPE muaj lub teeb yuag, tab sis muaj zog heev. Qhov ceev ntawm HDPE yog sib npaug los yog siab dua 0.941 g / cm3Yog vim li cas rau qhov siab ceev no piv rau cov polyethylene li niaj zaus yog qhov qis ntawm cov ceg ntoo thiab yog li, cov saw hlau polymer ntim nruj.
YProperties of HDPE
Qee yam tseem ceeb ntawm HDPE muaj npe hauv qab no.
- Lub yuag
- siab zog
- Impact resistance
- Huab cua tiv thaiv
- Lub neej ntev
- Resistance rau pwm, kab, rotting, thiab lwm yam.
- Muaj peev xwm ua pwm rau hauv cov duab sib txawv; malleability.
- Corrosion resistance
- Recyclable
- Tshav kub kub
Daim duab 1: Rov ua dua Chav ntawm HDPE
Daim ntawv thov ntawm HDPE
Muaj ntau daim ntawv thov ntawm HDPE. Daim ntawv thov loj yog tsim cov raj mis yas, hnab yas, lub raj mis lub kaus mom, nkoj, foob pob hluav taws, roj tank tsheb, thiab lwm yam.
YPP yog dab tsi?
PP yog polypropylene. Nws yog ib qho thermoplastic polymer ua los ntawm propylene monomers. PP yog tsim los ntawm kev ntxiv polymerization ntawm propylene monomers.
khoom ntawm PP
Cov khoom tseem ceeb ntawm PP muaj npe hauv qab no.
- Low ceev (0.905 gcm3)
- Heat resistance
- Ntxhais
- Resistance to chemicals
- siab pob tshab
- kev ua kom muaj zog
- weldability
- Recyclability
Daim duab 2: Tacticity hauv PP; isotactic PP (sab saum toj ob chains) thiab syndiotactic PP (hauv qab saw).
Thaum cov saw hlau polymer ntawm PP raug txiav txim siab, nws muaj methyl pawg ntawm ib sab ntawm cov saw hlau polymer. Cov pab pawg sab no yog hu ua pendant pawg. Raws li cov qauv ntawm cov saw hlau polymer, muaj peb hom PP hu ua isotactic, atactic PP, thiab syndiotactic PP. Isotactic PP muaj pendant pawg ntawm tib sab thiab atactic PP muaj pendant pawg nyob rau hauv ib tug random yam whereas syndiotactic PP muaj pendant pawg nyob rau hauv ib tug alternating qauv.
Dab tsi yog qhov zoo sib xws ntawm HDPE thiab PP?
- HDPE thiab PP yog cov khoom sib xyaw polymer.
- Ob leeg yog cov khoom siv thermoplastic.
- Ob leeg muaj qhov hnyav.
Qhov txawv ntawm HDPE thiab PP yog dab tsi?
YHDPE vs PP |
|
| HDPE yog polyethylene high-density. | YPP yog polypropylene. |
| Ceev | |
| HDPE muaj qhov ceev heev (0.941 g / cm 3). | PP muaj qhov ntom ntom (0.905 gcm 3). |
| HDPE muaj qhov qis qis ntawm cov saw hlau polymer. | PP muaj qib siab ntawm polymer saw ceg piv rau HDPE. |
| Transparency | |
| Qhov pom tseeb ntawm HDPE qis. | Cov pob tshab ntawm PP yog siab. |
| Tacitiy | |
| Tacticity tsis muaj nyob hauv HDPE. | Tacticity muaj nyob rau hauv PP. |
| Tsub Tolerance | |
| HDPE tsis tuaj yeem tiv taus cov kab mob autoclaving. | PP tuaj yeem tiv taus cov kab mob autoclaving. |
Summary – HDPE vs PP
HDPE thiab PP yog cov khoom siv polymer uas yog thermoplastic. Lub sij hawm HDPE stands rau high-density polyethylene. Lub sij hawm PP stands rau polypropylene. Qhov sib txawv tseem ceeb ntawm HDPE thiab PP yog cov monomer siv los ua HDPE yog ethylene whereas lub monomer siv los ua PP yog propylene.
