Kusiyanisa High density polyethylene (HDPE) kubva kuLDPE
High density polyethylene (HDPE) uye low density polyethylene (LDPE) imhando mbiri dze polyethylene polima dzine hunhu hwakasiyana. Heino misiyano yakakosha pakati pavo:
1. Molecular Structure:
HDPE ine mutsara dhizaini ine diki branching, zvichikonzera kuwanda kwepamusoro uye crystallinity. LDPE, kune rumwe rutivi, ine yakanyanya kusimba uye isina kurongeka chimiro, inotungamira kune yakaderera density uye kushoma crystallinity.
2. Density:
Sezvinoratidzwa nezita racho, High density polyethylene (HDPE) ine density yakakwirira zvichienzaniswa ne low density polyethylene (LDPE). HDPE kazhinji ine density range ye0.941-0.965 g/cm³, nepo LDPE ine density renji ye0.910-0.940 g/cm³. Uyu musiyano mukuwanda unokanganisa maitiro avo emuviri.
3. Simba uye Kuoma:
HDPE inozivikanwa nekusimba kwayo kwepamusoro uye kuoma. Iyo ine yakanakisa tensile simba, kukanganisa kupikisa, uye kusimba, ichiita kuti ive yakakodzera kune maapplication anoda kurongeka kwechimiro. LDPE, kune rumwe rutivi, inonyanya kushanduka uye ine simba rakaderera uye kuoma.
4. Melting Point:
HDPE ine nzvimbo yakakwira yekunyungudika kana ichienzaniswa neLDPE. Kunyungudika kweHDPE kunotangira pa120-180°C, ukuwo LDPE ichinyunguduka patembiricha yakaderera ye105-115°C. Uyu mutsauko wekunyungudika unokanganisa mashandiro avo uye mashandisirwo.
5. Kujeka:
HDPE inopenya kana kuti opaque, nepo LDPE iri pachena. Izvi zvinokonzerwa nekusiyana kwekristallinity yavo. HDPE yakakwira crystallinity inoparadzira mwenje, zvichikonzera kutaridzika kupenya, nepo LDPE yakaderera crystallinity inobvumira mwenje kuti ipfuure, ichiita kuti ive pachena.
6. Chemical Resistance:
Ose ari maviri HDPE neLDPE anoratidza kunaka kwemakemikari kuramba. Nekudaro, HDPE ine kuramba kuri nani kumakemikari, zvinonyungudutsa, uye asidhi zvichienzaniswa neLDPE. HDPE inowanzoshandiswa kumatangi ekuchengetedza makemikari, mapaipi, uye liner.
7. mafomu:
HDPE inoshandiswa zvakanyanya mumaindasitiri akasiyana siyana, kusanganisira kurongedza (mabhodhoro, midziyo), kuvaka (pombi, geomembranes), mota (matangi emafuta, mabumpers), uye zvekurima (pombi dzekudiridza, mafirimu egreenhouse). LDPE inowanzoshandiswa kurongedza mafirimu, mabhegi, mabhodhoro ekusvina, uye machira.
Muchidimbu, HDPE neLDPE zvinosiyana maererano nechimiro chemolecular, density, simba, kuoma, kunyungudika, kujeka, kuramba kwemakemikari, uye mashandisirwo. Kunzwisisa misiyano iyi kwakakosha pakusarudza iyo yakakodzera polymer kune chaiyo maapplication
