Yintoni umahluko phakathi kwe-LDPE kunye ne-PE?
I-LDPE vs. PE: Ukuqonda iiyantlukwano eziPhambili kwiiPropati kunye nosetyenziso
Polyethylene (PE) yimathiriyeli yeplastiki enemisebenzi emininzi enoluhlu olubanzi lwezicelo. Nangona kunjalo, kukho iindidi ezahlukeneyo ze-PE, nganye ineempawu zayo ezizodwa kunye nokusetyenziswa. Iindidi ezimbini eziqhelekileyo zi-low-density polyethylene (LDPE) kunye ne-polyethylene (PE).
1.Iipropati
I-LDPE ibonakaliswe kukuxinana kwayo okuphantsi, ukuguquguquka, kunye nokuqina. Inomgangatho ophezulu we-crystallinity, onika imbonakalo ye-waxy kwaye yenza ukuba ikwazi ukumelana neekhemikhali kunye nokufuma. I-PE, kwelinye icala, ixinene kwaye yomelele kune-LDPE. Ikwaqinile kwaye inendawo ephezulu yokunyibilika.
2.Izicelo
Iipropati ezahlukeneyo ze-LDPE kunye ne-PE zikhokelela ekusebenziseni kwazo kwizicelo ezahlukeneyo. I-LDPE iqhele ukusetyenziswa kwiifilimu zokupakisha, iingxowa zeplastiki, kunye neebhotile zokukhama ngenxa yokuguquguquka kwayo kunye nokuchasana neekhemikhali. Ikwasetyenziswa kwi-insulation yombane kunye neengubo zocingo.
I-PE isetyenziswa kuluhlu olubanzi lwezicelo, kubandakanya imibhobho, iibhotile, amathoyizi, kunye neendawo zemoto. Amandla ayo kunye nokuqina kwayo kuyenza ilungele ukusetyenziswa kwezakhiwo, ngelixa ukuchasana kwayo neekhemikhali kunye nokufuma kwenza kube yinto efanelekileyo yokusetyenziswa kwizikhongozeli kunye nokupakishwa.
3.Ukusetyenzwa
I-LDPE kunye ne-PE zinokusetyenzwa kusetyenziswa iindlela ezahlukeneyo, kubandakanya i-extrusion, isitofu sokubumba, kunye nokubumba ukuvuthela. Nangona kunjalo, iimeko zokucubungula uhlobo ngalunye lwe-PE zihlukile. I-LDPE ifuna amaqondo obushushu obuphantsi okuqhuba kunye noxinzelelo kune-PE, kwaye inokuqwalaselwa ngokukhawuleza.
4.Iingqwalasela zokusiNgqongileyo
Zombini i-LDPE kunye ne-PE ziyarisayikilishwa, kodwa impembelelo yazo yokusingqongileyo iyahluka. I-LDPE iphinda isetyenziswe ngokulula ngakumbi kune-PE, kwaye inomlinganiselo osezantsi wekhabhoni. Nangona kunjalo, zombini iindidi ze-PE zinokufaka isandla kungcoliseko lweplastiki ukuba azilahlwanga ngokufanelekileyo.
I-5.Conclusion
I-LDPE kunye ne-PE zimbini iintlobo ezibalulekileyo ze-polyethylene ezineempawu ezahlukileyo kunye nokusetyenziswa. I-LDPE iphawulwa ngoxinzelelo oluphantsi, ukuguquguquka, kunye nokuqina, ngelixa i-PE ixinene, yomelele, kwaye yomelele ngakumbi. Ezi zintlukwano zenza uhlobo ngalunye lwe-PE lufaneleke kwizicelo ezahlukeneyo, ukusuka kwipakethe ukuya kumacandelo olwakhiwo. Ukuqonda umahluko ophambili phakathi kwe-LDPE kunye ne-PE kubalulekile ekukhetheni imathiriyeli efanelekileyo kwisicelo esithile.
Ukuthelekisa i-LDPE kunye ne-PE: Isikhokelo esiBanzi kwiiMpawu zeMathiriyeli
I-polyethylene ephantsi (i-LDPE) kunye ne-polyethylene (PE) zizinto ezimbini ezisetyenziswa ngokubanzi zeplastiki ezineempawu ezahlukeneyo kunye nokusetyenziswa. Ukuqonda umahluko wabo kubalulekile ekukhetheni imathiriyeli efanelekileyo kwiimfuno ezithile.
1.Ulwakhiwo lweMolekyuli kunye noXinano
I-LDPE kunye ne-PE babelana ngokubunjwa kweekhemikhali ezifanayo (C2H4)n, kodwa bahluke kwisakhiwo sabo se-molecular. I-LDPE ine-branched molecular structure, ngelixa i-PE inomgca okanye i-branched structure. Lo mahluko kwi-branching uchaphazela ubuninzi bezinto eziphathekayo, kunye ne-LDPE ene-density ephantsi (0.91-0.94 g / cm3) kune-PE (0.94-0.97 g / cm3).
2.IiPropati zoomatshini
Ulwakhiwo lwemolekyuli luphinda luphembelele iipropathi zomatshini ze-LDPE kunye ne-PE. I-LDPE iguquguquka ngakumbi kwaye i-ductile kune-PE ngenxa yesakhiwo sayo se-branched, esivumela ukunyakaza okukhulu kwekhonkco. I-PE, kwelinye icala, iqinile kwaye yomelele, ngakumbi kwifom yomgca.
Iipropati ze-3.Thermal
I-LDPE ineqondo eliphantsi lokunyibilika (110-120 ° C) kunye nobushushu obuphezulu beglasi (Tg) (-120 ° C) xa kuthelekiswa ne-PE. Oku kuthetha ukuba i-LDPE iyathambile kwaye ithambile kumaqondo obushushu asezantsi, ngelixa i-PE ihlala iqinile kude kube ngamaqondo aphezulu.
4.Ukunyangwa kweeKhemikhali
Zombini i-LDPE kunye ne-PE zibonisa ukuxhathisa okugqwesileyo kweekhemikhali kwiiasidi ezininzi, iziseko, kunye nezinyibilikisi. Nangona kunjalo, i-LDPE ixhathisa kancinci kwiikhemikhali ezithile, njengeklorini kunye nee-oxidizing agents.
5.Izicelo
Iimpawu ezicacileyo ze-LDPE kunye ne-PE zibenza zilungele uluhlu olubanzi lwezicelo. I-LDPE iqhele ukusetyenziswa kwipakethe eguquguqukayo, iifilimu, kunye neengxowa ngenxa yokuguquguquka kwayo kunye noxinzelelo oluphantsi. I-PE, ngokukodwa i-PE (i-LLDPE kunye ne-HDPE), isetyenziswe kwizicelo ezifuna amandla aphezulu kunye nokuqina, njengemibhobho, iibhotile kunye neendawo zemoto.
I-6.Conclusion
I-LDPE kunye ne-PE zizinto zeplastiki eziguquguqukayo ezineempawu ezizodwa ezimisela ukufaneleka kwazo kwizicelo ezithile. I-LDPE ibonelela ngokuguquguquka kunye noxinano oluphantsi, ngelixa i-PE ibonelela ngamandla kunye nobungqongqo. Ukuqonda umahluko phakathi kwezi zixhobo kubalulekile ekukhetheni izinto ezifanelekileyo kwinjongo ethile, ukuqinisekisa ukusebenza kakuhle kunye nokuqina.
I-LDPE vs. PE: Uhlalutyo oluneenkcukacha lokuSebenza kunye nokuqwalaselwa kweendleko
I-polyethylene ephantsi (i-LDPE) kunye ne-polyethylene (PE) zizinto ezimbini ezisetyenziswa ngokubanzi zeplastiki ezineempawu ezahlukeneyo kunye nokusetyenziswa. Ukuqonda iiyantlukwano zabo kubalulekile ekukhetheni imathiriyeli efanelekileyo kwiimfuno ezithile.
1.Ukwakheka kunye neSakhiwo
I-LDPE yipolymer ene-branched, okuthetha ukuba amatyathanga ayo emolekyuli anamasebe asecaleni. Le branching inciphisa ubuninzi kunye nekristallinity ye-LDPE xa kuthelekiswa ne-PE. I-PE, kwelinye icala, i-polymer ehambelanayo kunye ne-branching encinci, ekhokelela ekuxineni okuphezulu kunye ne-crystallinity.
2.Iipropati
Isebe kwi-LDPE linika ukuguquguquka, ukuqina, kunye nokumelana nempembelelo. Ikwacaca ngakumbi kwaye inendawo yokunyibilika esezantsi kunePE. I-PE, kunye nesakhiwo sayo somgca, ibonisa amandla aphezulu, ukuqina, kunye nokuqina. Ikwayi-opaque ngakumbi kwaye inendawo ephezulu yokunyibilika.
3.Izicelo
Ukuba bhetyebhetye kwe-LDPE kunye nokuchasana kwempembelelo kuyenza ilungele usetyenziso olunje ngeefilimu zokupakisha, iingxowa, kunye nezinto zokudlala. Ukucaca kwayo kuvumela ukupakishwa okucacileyo, ngelixa indawo yayo ephantsi yokunyibilika iququzelela ukutywinwa kobushushu. I-PE, ngamandla ayo kunye nokuqina kwayo, isetyenziswa kwizicelo ezinjengemibhobho, iibhotile, kunye neenxalenye zemoto. Indawo yayo ephezulu yokunyibilika iqinisekisa uzinzo lwe-dimensional kumaqondo obushushu aphakamileyo.
4.Ukuqwalaselwa kweendleko
I-LDPE ibiza kakhulu kune-PE ngenxa yenkqubo yayo yemveliso entsonkothileyo. Nangona kunjalo, ukuguquguquka kwayo kunye nokuchasana kwempembelelo kunokuthethelela ixabiso eliphezulu kwizicelo ezithile. I-PE, enexabiso eliphantsi kunye namandla ayo aphezulu, ihlala ikhethwa kwizicelo apho ezi zakhiwo zibaluleke kakhulu.
5.Iingqwalasela zokusiNgqongileyo
Zombini i-LDPE kunye ne-PE ziyarisayikilishwa, kodwa amaxabiso azo okurisayikilishwa ayahluka. I-LDPE inezinga eliphezulu lokurisayikilisha ngenxa yosetyenziso lwayo olubanzi ekupakisheni. Nangona kunjalo, ubukho bamasebe asecaleni kwi-LDPE bunokwenza kube nzima ukurisayikilisha kune-PE.
I-6.Conclusion
I-LDPE kunye ne-PE zizinto zeplastiki eziguquguqukayo ezineempawu ezahlukeneyo kunye nokusetyenziswa. I-LDPE ibonelela ngokuguquguquka, ukuqina, kunye nokungafihli, ngelixa i-PE ibonelela ngamandla, ukuqina, kunye nokuqina. Ukhetho phakathi kwezi zixhobo luxhomekeke kwiimfuno ezithile zesicelo, ngokuqwalasela ukusebenza, iindleko, kunye nezinto zokusingqongileyo. Ngokuqonda umahluko phakathi kwe-LDPE kunye ne-PE, iinjineli kunye nabaqulunqi banokunyusela ukhetho lwemathiriyeli ukuze lusebenze ngokugqibeleleyo kunye nokusebenza kakuhle kweendleko.
