Polypropylene - qhibiliha mocheso, thepa le lintho tse khethollang

Polypropylene nang le ntlha qhibiliha e leng lokela ho tsebahala hore o haeba u batla ho sebelisa boitsebiso boo bakeng sa merero ea botho, ke bao e seng Polar maiketsetso thermoplastic polymer eo ke oa sehlopha sa polyolefins.

bakeng sa tlaleho ea

E mong polypropylene tsejoa e le sehlahisoa sa propylene molekyler. lintho tse bonahalang tse e tšoeu 'mala le o na le mohaho o tiileng. Sena se ne a lokisitsoeng ke sa molekyler tsa propylene. Molekyler e etsoa tlas'a tšusumetso ea khatello ea atmospheres 10, mocheso e ba lula ba ka hare ho 80 ° C.

Limolek'hule sebopeho le ntlha qhibiliha

Polypropylene, ntlha qhibiliha tsa e leng tla e mong ea bitsoang ka tlase, le mofuta oa sebopeho limolek'hule e arotsoe mefuta e meraro:

• atactic;
• syndiotactic;
• isotactic.

Atactic polypropylene - ka rabara-joaloka lintho tse bonahalang e nang le lengolo la phahameng tsa fluidity. ntlha lona qhibiliha e 80 ° C, ha a ntse a segokanyipalo sa e 850 lik'hilograma / m³. lintho tse bonahalang ona o boetse o tšoauoa ka e solubility phahameng ka diethyl phenylate.

Ho fapana ka litšobotsi tse lona ho tloha ka holimo-o ile a hlalosa isotactic polypropylene ka hore e na le modulus phahameng tsa elasticity, segokanyipalo lona fihla ka 910 g, / m³, athe ntlha qhibiliha e phahame haholo le ranges ho tloha 165 ho 170 ° C. boitsebiso boo ke manganga ho lik'hemik'hale.

thepa Physico-mechine le songolo

Polypropylene le ntlha e le qhibilihang ho boletsoe ka holimo, e fapaneng ho tloha nhua polyethylene tsa segokanyipalo tlaase, eo e 0,91 g, / cm³. boleng Sena ke tloaelehile hore dipolasetiki. O ile a hlalosa lintho tse bonahalang tse ngata le tiileng ho feta, ho e bontšitse hore ho na le ho hanyetsa phahameng ho abrasion.

Har'a lintho tse ling, polypropylene, mocheso manganga, hobane e qala ho nolofatsa ha mocheso fihla 140 ° C. The qhibiliha mocheso ke 175 ° C, ho feta moo, lintho tse bonahalang tse e haholo ha a pepesa ho hatisa ts'enyeho ho petsoha. Leseli manganga polypropylene ka oksijene. Selelekela stabilizer lowers le nahanela esita le ho feta.

Polypropylene nang le ntlha qhibiliha u ka 'na ho thahasella, haeba u rera ho sebelisa boitsebiso boo, ha a otlolla tla itšoara ka tsela e fapaneng ho itšetlehile ka mocheso le mojaro kopo lebelo. E ka tlaase ho tekanyo ea otlolla, e khōlō boleng ba thepa le ho phetha molao feela. Tensile roba khatello ea kelello fapana ho ea 250 ho ea 400 kgf / cm², athe elongation ka khefu e tloha 200 ho ea ho 800%.

The qhibiliha ntlha ya polypropylene lakane, e leng e se e boletsoeng ka holimo, ha se feela tšobotsi eo thahasello bareki poraefete. Ka linako tse ling o amehang ho feta le flexural modulus. Tabeng joale e ka 'na ea fapana ho ea ka 6700 ho 11900 kgf. Ha lihlahisoa ntlha elongation ke lekanang le a ho 10-20%. Tshusumetso matla le hapa ke 33-80 kgf cm, / cm². Brinell thatafala ke 6-6.5 lik'hilograma / mm².

lekala la kopo

Tshebediso ya polypropylene e pharaletseng. Boitsebiso bo sebelisoa ho etsa lifilimi mona kenyeletsa mefuta e sa tsoaneng ambalaji. Har'a lihlahisoa tse ling ho ke ke ho hlokahala hore ho abelwang karolo ya:

• mekotla;
• liphaephe;
• polasetiki linoelo;
• ambalaji;
• lintlha tsa thepa botekgeniki;
• thepa ba ntlo;
• li sireletsang serameng tse bonahalang;
• bao e seng lohiloeng lesela.

Ka kaho ea polypropylene a boela a fumana tsela ea eona, ho na le e sebediswa bakeng sa ho thothometsa le lerata ho itšehla thajana fatše, hammoho le ka tsamaiso ea hore ba rarolla ka thekenoloji "phaphametseng mokatong". Ha polypropylene e copolymerized le ethylene, bao e seng crystallizable copolymer ka fumanoa. E ka bontša litšobotsi tse rabara, le nang le ho hanyetsa botsofali 'me e phahameng lik'hemik'hale ho hanyetsa.

Bakeng sa mocheso le thothometsa ho pharaletseng sebediswa atolositseng polypropylene. The qhibiliha mocheso ea lakane polypropylene ile boletsoeng ka holimo, Leha ho le joalo, sena ha se tšobotsi feela hore u lokela ho thahasella pele reka lihlahisoa ho tloha boitsebiso boo. Ho lokela ho boela ho be le hlokomela hore polypropylene atolosoa ke tsoana haholo ka thepa ho bubble nhua polyethylene. Empa EPS ka nkeloa sebaka ke le khabisitsoeng le profil extrusion ya atolosoa polypropylene. Bakeng sa caulking, coatings tseleng, likhomaretsi kaho, mastics le lifilimi theipi sebelisoa hangata atactic polypropylene. Boholo ba polypropylene Russia e ne e le ka tsela e latelang:

• 38% - lik'hontheinara;
• 30% - khoele;
• 18% - filimi;
• 6% - liphaephe;
• 5% - polypropylene maqephe;
• 3% - Tse ling.

Ntlha qhibiliha ea lipeipi polypropylene

The qhibiliha ntlha ea lipeipi polypropylene - ke e 'ngoe ea litšobotsi tse tseo, e leng hangata ka ho fetisisa thahasella ka moreki ea kajeno. boitsebiso boo qala ho nolofatsa ka 140 ° C le hoja qhibiliha - 175 ° C. Khetho ea ho qetela - e ke mocheso oa mouoane superheated. Ha re nahana ka palo ena, polypropylene ka sebelisoa bakeng sa leha e le efe oona tsamaisong phepelo ea metsi ka ho e metsi a isoa le mocheso tsitlella phahameng.

Empa lintho tse sa bonolo ka taba ena. The ductility sebetsang sebakeng sa hae e le karolo e eketsehileng ea boitsebiso boo. Polypropylene ka khefu e na le elongation eo fapana hara fapaneng ya 200 ho tse 800%. Sena se bontša hore ha phala e tla angoa ke e boima ba 'mele tse itseng, moo sehlahiswa tla atoloswa ka phaephe e telele,' me joale terminates.

Ka fihlela qeto ena: mofuta wa polypropylene

The thepa ea polypropylene, litšobotsi le mofuta wa lintho tse bonahalang sena se tla ho dumella ho utloisisa hore na ke eng sebakeng se molemo ka ho fetisisa ho le sebelisa. Isotactic polypropylene hona joale o nkoa e le ea ratoang ka ho fetisisa ho indasteri e. Sena ke ka lebaka la lintlha tsa mefuta e mengata ea lintho tse bonahalang, maemo a khethehileng moo lihlopha lehlakoreng ke CH3, teng e sa tloaelehang mabapi le ho se ketane e khōlō. Joalo boemong hlalosoa litsobotsi life tse mantlha lokela ho abelwa har'a bona: bokhoni ba ho boloka sebopeho lona ka thempereichara e phahameng, thatafala le matla a phahameng.