Yintoni iGeneral Iipropati zePolyethylene Resin
General Iipropati zePolyethylene Resin
I-polyethylene resin ayiyotyhefu, umgubo omhlophe ongenavumba okanye igranule, umhlophe omhlophe ngenkangeleko, unemvakalelo efana ne-wax, kunye nokufunxa kwamanzi aphantsi, ngaphantsi kwe-0.01%. Ifilimu ye-polyethylene ibonakala kwaye iyancipha ngokunyuka kwe-crystallinity. Ifilimu ye-polyethylene ine-permeability yamanzi ephantsi kodwa i-air permeability ephezulu, engafanelanga ukupakishwa okutsha kodwa ilungele ukupakishwa kobumanzi. Inokutsha, kunye nesalathiso se-oksijini ye-17.4, umsi ophantsi xa uvutha, inani elincinci lamaconsi atyhidiweyo, umthubi kwilangatye kunye noluhlaza okwesibhakabhaka ezantsi, kunye nevumba leparafini. I-Polyethylene inokumelana okungcono kwamanzi. Umphezulu wemveliso awukho-polar, kunzima ukubopha kunye nokuprinta, kwaye uphuculwe ngonyango oluphezulu. Amatyathanga amaninzi ane-branched anokuxhathisa kakubi kwi-photodegradation kunye ne-oxidation.
Ubunzima bayo bemolekyuli buphakathi kwe-10,000 ukuya kwi-100,000. Ukuba ubunzima bemolekyuli bungaphezulu kwe-100,000, bubunzima obuphezulu bemolekyuli yepolyethylene. Ukuphakama kobunzima be-molecular, ngcono iimpawu zayo zomzimba kunye noomatshini, kwaye ngokusondeleyo kwinqanaba elifunekayo lezinto zobunjineli. Kodwa okukhona buphezulu ubunzima bemolekyuli, kokukhona kunzima ukusetyenzwa. I-polyethylene inendawo yokunyibilika ye-100-130 ° C kwaye inokumelana nobushushu obuphantsi kakhulu. Isenako ukugcina iipropati ezilungileyo zoomatshini kwi--60 °C, kodwa ubushushu bokusebenza yi-80~110 °C.
Ayinyibiliki kuyo nayiphi na i-solvent eyaziwayo kwiqondo lokushisa, kwaye inokunyibilika kwixabiso elincinci kwi-toluene, i-amyl acetate, i-trichlorethylene kunye nezinye izinyibilikisi ezingaphezu kwe-70 ° C.
Iipropati zoMbane zePolyethylene Resin
Ngenxa yokuba i-polyethylene i-non-polar, ineempawu ezintle zombane kunye nelahleko ye-dielectric ephantsi kunye namandla aphezulu e-dielectric. Ingasetyenziswa njengesixhobo sokwenza i-insulating frequency, iplastiki enganyangekiyo kwi-corona, kunye nemathiriyeli ephezulu yombane.
Iimpawu zeThermal
Ukumelana nokushisa kwe-polyethylene ayiphezulu, kwaye iphucula ngokunyuka kobunzima be-molecular kunye ne-crystallinity. Ukumelana kakuhle nobushushu obuphantsi, iqondo lobushushu brittle can generalukufikelela ngaphantsi -50 ℃; kunye nokwanda kobunzima bemolekyuli, eyona iphantsi inokufikelela ku -140 ℃. I-coefficient yokwandisa i-linear ye-polyethylene inkulu, ukuya kuthi ga (20～24)×10-5/K. I-conductivity ephezulu ye-thermal.