Ulwazi oluSisiseko malunga neeNdidi eziNtathu ze-PE Material (I)

1. Uxinaniso oluphezulu lwepolyethylene (HDPE)

I-HDPE ayinayo ityhefu, ayinancasa kwaye ayinavumba, kunye nobuninzi be-0.940-0.976g / cm3.Yimveliso yepolymerization phantsi koxinzelelo oluphantsi phantsi kwe-catalysis ye-Ziegler catalyst, ngoko ke i-polyethylene ephezulu yoxinaniso ikwabizwa ngokuba yi-polyethylene yoxinzelelo oluphantsi.

I-advanteji:

I-HDPE luhlobo lwe-resin ye-thermoplastic ene-crystallinity ephezulu kunye ne-non-polarity eyenziwe yi-copolymerization ye-ethylene.Imbonakalo ye-HDPE yoqobo imhlophe qhwa, kwaye iguquguquka kwinqanaba elithile kwicandelo elincinci.Inokumelana okugqwesileyo kuninzi lweekhemikhali zasekhaya nakwimizi-mveliso, kwaye inokuxhathisa ukubola kunye nokunyibilika kwe-oxidants eyomeleleyo (i-nitric acid egxininisiweyo), iityuwa ezisisiseko se-asidi kunye nezinyibilikisi ze-organic (carbon tetrachloride).I-polymer ayinayo i-hygroscopic kwaye inokumelana kakuhle nomphunga wamanzi kwaye ingasetyenziselwa ukufuma kunye nokumelana nokuphuma kwamanzi.

Ukusilela:

Ukungalungi kukuba ukuchasana nokuguga kunye nokuqhekeka koxinzelelo lwendalo akulunganga njenge-LDPE, ngakumbi i-oxidation ye-thermal iya kunciphisa ukusebenza kwayo, ngoko i-HDPE yongeza i-antioxidants kunye ne-UV absorbers xa yenziwe kwiikhoyili zeplastiki ukuphucula ukusebenza kwayo.iintsilelo.

2. I-polyethylene yoxinaniso oluphantsi (LDPE)

I-LDPE ayinayo ityhefu, ayinancasa kwaye ayinavumba, kunye noxinzelelo lwe-0.910-0.940g/cm3.I-polymerized nge-oxygen okanye i-organic peroxide njenge-catalyst phantsi koxinzelelo oluphezulu lwe-100-300MPa.Ikwabizwa ngokuba yi-high-pressure polyethylene.I-LDPE ibizwa ngokuba ngumbhobho we-PE kushishino lokunkcenkceshela.

I-advanteji:

I-polyethylene ye-low density yintlobo elula kakhulu ye-polyethylene resins.Xa kuthelekiswa ne-HDPE, i-crystallinity yayo (55% -65%) kunye ne-softening point (90-100℃) iphantsi;inokuguquguquka okuhle, ukwandiswa, ukungafihli, ukumelana nokubanda kunye nokuqhubekeka;ikhemikhali yayo Uzinzo Good, acid, alkali kunye netyuwa isisombululo aqueous;ukufakwa kakuhle kombane kunye nokungena komoya;ukufunxwa kwamanzi aphantsi;kulula ukutshisa.Ithambile ngokwendalo kwaye inokwandiswa okuhle, ukugqunywa kombane, ukuzinza kweekhemikhali, ukusebenza kokusebenza kunye nokumelana nobushushu obuphantsi (kunokumelana -70 ° C).

Ukusilela:

Ukungalungi kukuba amandla ayo omatshini, umqobo wokufuma, umqobo wegesi kunye nokumelana ne-solvent akubi.Isakhiwo se-molecular asiqhelekanga ngokwaneleyo, i-crystallinity (55% -65%) iphantsi, kwaye i-crystalline melting point (108-126 ° C) nayo iphantsi.Amandla ayo omatshini aphantsi kune-polyethylene ephezulu, kwaye i-coefficient yayo yokunganyanzeki, ukumelana nobushushu kunye nokukhanya kwelanga ukuguga akubi.Ii-Antioxidants kunye ne-UV absorbers zongezwa ukulungisa iintsilelo zayo.