Ukuhlelwa kwePP kunye neenzuzo zepropati kunye nokungalunganga:
I-Polypropylene (PP) ihlukaniswe kwi-homo-polymer polypropylene (PP-H), ibhloko (impembelelo) i-co-polymer polypropylene (PP-B) kunye ne-random (random) co-polymer polypropylene (PP-R).Zeziphi izinto eziluncedo, ezingeloncedo kunye nokusetyenziswa kwePP?Yabelana nawe namhlanje.
1. IHomo-polymer polypropylene (PP-H)
I-polymerized ukusuka kwi-propylene monomer enye, kwaye i-molecular chain ayinayo i-ethylene monomer, ngoko ke ukuqheleka kwe-molecular chain kuphezulu kakhulu, ngoko ke izinto eziphathekayo zine-crystallinity ephezulu kunye nokusebenza kakubi kwempembelelo.Ukuze kuphuculwe i-brittleness ye-PP-H, abanye ababoneleli bezinto eziluhlaza basebenzisa indlela yokudibanisa i-polyethylene kunye ne-ethylene-propylene irabha ukuphucula ukuqina kwezinto, kodwa ayinakusombulula ngokusisiseko ukuzinza kwexesha elide lobushushu bePP. -H.ukusebenza
Izinto eziluncedo: ukomelela kakuhle
Izinto ezingeloncedo: ukunganyangeki kwempembelelo embi (i-brittle ngakumbi), ukungaqini kakuhle, uzinzo olulambathayo, ukuguga lula, ukuzinza okungenamandla kwexesha elide.
Isicelo: Ibakala lokuvuthela i-Extrusion, ibakala lomsonto osicaba, ibakala lokubumba inaliti, ibakala lefiber, ibakala lefilim elivuthelweyo.Ingasetyenziselwa ukubopha, ukuvuthela iibhotile, iibrashi, iintambo, iibhegi ezilukiweyo, iithoyi, iifolda, izixhobo zombane, izinto zasendlini, iibhokisi zesidlo sasemini kwi-microwave, iibhokisi zokugcina, iifilimu zokusonga amaphepha.
Indlela yocalucalulo: xa umlilo utshiswa, ucingo luthe tyaba, kwaye alukho lude.
2. Ngokungaqhelekanga (ngokungaqhelekanga) i-polypropylene eyenziwe nge-copolymerized (PP-R)
Ifunyenwe ngokubambisana kwe-polymerization ye-propylene monomer kunye nenani elincinci le-ethylene (1-4%) i-monomer phantsi kwesenzo sokushisa, uxinzelelo kunye ne-catalyst.I-ethylene monomer isasazwa ngokungacwangciswanga kwaye isasazwe kwikhonkco elide lepropylene.Ukongezwa okungahleliwe kwe-ethylene kunciphisa i-crystallinity kunye ne-melting point ye-polymer, kwaye iphucula ukusebenza kwezinto ngokubhekiselele kwimpembelelo, ixesha elide lokumelana noxinzelelo lwe-hydrostatic, ukuguga kwexesha elide le-oxygen, kunye nokulungiswa kombhobho kunye nokubumba.Isakhiwo se-molecular chain ye-PP-R, umxholo we-ethylene monomer kunye nezinye izibonakaliso zinefuthe elithe ngqo kwi-thermal stability yexesha elide, iipropathi zoomatshini kunye neepropathi zokucubungula izinto.Okukhona ukusasazwa okungahleliwe kwe-ethylene monomer kwikhonkco lemolekyuli yepropylene, kubaluleke ngakumbi utshintsho lweepropathi zepolypropylene.
Izinto ezilungileyo: ukusebenza kakuhle okubanzi, ukomelela okuphezulu, ubulukhuni obuphezulu, ukumelana nobushushu obulungileyo, uzinzo olufanelekileyo lomda, ukuqina kobushushu obuphantsi (ukuguquguquka okuhle), ukungafihli kakuhle, iglosi elungileyo.
Ukungalungi: ukusebenza kakuhle kwiPP
Isicelo: Ibakala lokuvuthela i-Extrusion, ibakala lefilimu, ibakala lokubumba inaliti.Iityhubhu, iifilim ezicuthayo, iibhotile zedriphu, izikhongozeli ezicace kakhulu, iimveliso zasekhaya ezicacileyo, iisirinji ezilahlwayo, iifilimu zamaphepha ezisongayo.
Indlela yokuchonga: ayijiki ibemnyama emva kokutshiswa, kwaye inokukhupha ucingo olude olungqukuva
3. Ibhlokhi (impembelelo) i-co-polymer polypropylene (PP-B)
Umxholo we-ethylene uphezulu kakhulu, ngokubanzi 7-15%, kodwa ngenxa yokuba amathuba okudibanisa iimonomers ezimbini ze-ethylene kunye nee-monomers ezintathu kwi-PP-B ziphezulu kakhulu, kubonisa ukuba ekubeni i-ethylene monomer ikhona kuphela kwisigaba sebhloko, ye-PP-H iyancitshiswa, ngoko ayikwazi ukufezekisa injongo yokuphucula ukusebenza kwe-PP-H ngokubhekiselele kwindawo yokunyibilika, ukuchasana noxinzelelo lwexesha elide lwe-hydrostatic, ukuguga kwexesha elide le-oxygen ye-thermal kunye nokucutshungulwa kombhobho kunye nokwenza.
Izinto ezilungileyo: ukuchasana kwempembelelo engcono, iqondo elithile lokuqina liphucula amandla empembelelo
Ukungalungi: ukucaca okuphantsi, ukucwebezela okuphantsi
Isicelo: Ibakala Extrusion, naliti ukubumba ibakala.Iibhampa, iimveliso ezinodonga olucekethekileyo, izilawuli, izixhobo zemidlalo, imithwalo, iibhakethi zepeyinti, iibhokisi zebhetri, iimveliso ezinodonga olucekethekileyo
Indlela yokuchonga: ayijiki ibemnyama emva kokutshiswa, kwaye inokukhupha ucingo olude olungqukuva
Amanqaku aqhelekileyo: i-anti-hygroscopicity, i-asidi kunye ne-alkali enganyangekiyo, ukunganyangeki, ukunganyangeki kwe-oxidation kubushushu obuphezulu.
Izinga lokuhamba kwe-MFR ye-PP ikuluhlu lwe-1-40.Izinto ze-PP ezine-MFR ephantsi zinempembelelo engcono yokuchasana kodwa i-ductility ephantsi.Kwizinto ezifanayo ze-MFR, amandla ohlobo lwe-co-polymer luphezulu kunohlobo lwe-homo-polymer.Ngenxa ye-crystallization, i-shrinkage ye-PP iphezulu kakhulu, ngokubanzi i-1.8-2.5%.
