Qhov sib txawv tseem ceeb ntawm PP thiab LDPE yog tias PP yog cov khoom siv lead ua kom pom tseeb, qhov LDPE yog translucent lossis opaque.
Lub sij hawm PP sawv cev rau polypropylene, thaum lub sij hawm LDPE sawv cev rau cov polyethylene tsawg. Cov no yog cov polymers thiab yas.
YPP yog dab tsi?
PP lossis Polypropylene yog cov yas polymer. Lub monomer ntawm polypropylene yog propylene; nws muaj peb carbons thiab ib ob daim ntawv cog lus ntawm ob ntawm cov carbon atoms. Peb tuaj yeem tsim cov khoom siv no los ntawm cov pa roj propylene nyob rau hauv muaj cov catalyst xws li titanium chloride. Tsis tas li ntawd, kev tsim cov khoom siv no yooj yim, thiab nws muab lub siab purity.
Daim duab 01: Rov ua dua Chav ntawm PP
Cov khoom tseem ceeb tshaj plaws ntawm PP yog pob tshab, lub teeb yuag, siab tiv thaiv kev tawg, acids, organic solvents, electrolytes, thiab lwm yam., siab melting point, nontoxic xwm, zoo dielectric zog, thiab nyiaj txiag muaj nqis. Yog li ntawd, peb tuaj yeem siv cov khoom siv no los tsim cov kav dej, ntim khoom, khoom siv hauv tsev, ntim khoom, thiab cov khoom siv tsheb.
Peb tuaj yeem rov ua dua PP, tab sis nws nyuaj vim vim nws qhov ua haujlwm zoo thiab ua haujlwm rau feem ntau ntawm cov kuab tshuaj thiab cov kua nplaum. Peb tuaj yeem yaj cov khoom no siv cov txheej txheem nrawm nrawm.
LDPE yog dab tsi?
Lo lus LDPE sawv cev rau cov polyethylene tsawg. Nws yog cov khoom siv thermoplastic. Lub monomer ntawm cov khoom siv polymer no yog ethylene. LDPE tau tsim thawj zaug hauv xyoo 1933 los ntawm Imperial Chemical Industries siv cov txheej txheem ntawm kev kub siab dawb radical polymerization. Qhov no yog txoj kev tsim khoom ntau tshaj plaws rau LDPE txawm tias niaj hnub no.
Qhov ntom ntawm LDPE yog nyob nruab nrab ntawm 917 txog 930 Kg / m3. Cov khoom no tsis ua haujlwm ntawm chav tsev kub thaum tsis muaj oxidizers muaj zog thiab qee cov kuab tshuaj (uas tuaj yeem ua rau cov khoom o). LDPE yog qhov hloov tau yooj yim thiab tawv heev. Cov tsos ntawm LDPE feem ntau yog translucent lossis opaque.
Daim duab 02: Qhov tshwm sim ntawm LDPE Khoom
Piv rau lwm hom polyethylene xws li HDPE, LDPE muaj qib siab ntawm cov ceg ntoo, uas ua rau nws muaj zog tsis muaj zog, tsis muaj zog tensile, thiab siab resilience. Cov qauv no tuaj yeem ua rau nruj ntim ntawm cov molecules thiab tsawg crystallinity. Tsis tas li ntawd, nws ua rau cov khoom siv tsawg dua.
Muaj ntau yam kev siv LDPE, xws li kev tsim cov tais thiab cov thawv ntim dav dav, qhov chaw ua haujlwm corrosion-resistant, snap-on hau, 6-pob rings, kua txiv hmab txiv ntoo thiab mis nyuj cartons, ntim khoom rau lub computer. kho vajtse, chaw ua si slides, yas qhwv, thiab lwm yam.
Qhov txawv ntawm PP thiab LDPE yog dab tsi?
Lub sij hawm PP sawv cev rau polypropylene thaum lub sij hawm LDPE sawv cev rau cov polyethylene tsawg. Cov no yog cov khoom siv polymer uas poob rau hauv qeb ntawm cov yas. Qhov sib txawv tseem ceeb ntawm PP thiab LDPE yog tias PP yog cov khoom siv lead ua ntshiab, qhov LDPE yog cov translucent lossis opaque. Ntxiv mus, PP muaj ib tug tsawg degree ntawm branching, whereas LDPE muaj comparatively ib tug high degree ntawm branching. Tsis tas li ntawd, PP yog siv rau kev tsim cov kav dej, ntim khoom, khoom siv hauv tsev, ntim khoom, thiab cov khoom siv tsheb thaum LDPE yog siv rau kev tsim cov tais thiab cov thawv ntim khoom, cov chaw ua haujlwm corrosion-resistant, snap-on hau, rau pob rings, kua txiv hmab txiv ntoo thiab mis nyuj cartons, ntim khoom rau lub computer hardware, chaw ua si slides, yas qhwv, thiab lwm yam.
Cov hauv qab no infographic teev qhov sib txawv ntawm PP thiab LDPE hauv daim ntawv tabular rau ib sab kev sib piv.
Summary – PP vs LDPE
Lub sij hawm PP sawv cev rau polypropylene thiab lub sij hawm LDPE sawv cev rau polyethylene tsawg ntom. Qhov sib txawv tseem ceeb ntawm PP thiab LDPE yog tias PP yog cov khoom siv lead ua ntshiab, qhov LDPE yog cov translucent lossis opaque. Ntxiv mus, PP yog peb-carbon chemical compound, thaum LDPE yog ob-carbon chemical compound (carbon atoms per repeating unit).
