Polypropylene qhibiliha ntlha: libopeho le thepa

Polypropylene ke polymer thermoplastic tsa propene. Sena se ile sa lokisetsa ho ea ka thekenoloji molekyler tsa propylene sebelisa etswa ha ba tšepe. Ho fumana ena entsprechen lintho tse bonahalang ka tsela e tšoanang ho batho ba moo ba se hlahisitseng se phahameng segokanyipalo nhua polyethylene.

Ho itšetlehile ka ea mofuta ofe sethothetsi sebelisoa, ka khona ho fumana mofuta ofe kapa ofe oa polymer kapa metsoako lona. The qhibiliha ntlha ya polypropylene - ke e 'ngoe ea litšobotsi tsa bohlokoa tsa boitsebiso boo. Ho na le mofuta o mong oa phofo e tšoeu kapa granules, le segokanyipalo sa bongata ba tsona e fetohile ho 0, 5 g, / cm³. Boitsebiso o ile a hlalosa ka 'mala, kapa uncolored tsitsisoa.

Tobileng: sebopeho limolek'hule

Bakeng sa polypropylene mohaho limolek'hule e arotsoe mefuta tse 'maloa, har'a bona:

• isotactic;
• ataxic;
• syndiotactic.

Stereoisomers lintho tse bonahalang ka tsela e fapaneng dipharologantsho tse 'meleng, ho phetha molao feela le lik'hemik'hale. Mohlala, atactic polypropylene o na le mofuta o mong oa lintho tse bonahalang rabara-joaloka, e leng tšobotsi ea fluidity phahameng. The qhibiliha ntlha ya polypropylene bakeng extrusion tabeng ena ke ka 80 ° C, ha a ntse a segokanyipalo sa e ka fihla boemong ba lik'hilograma 850 / m³.

The diethyl phenylate lintho tse bonahalang tse o qhalana hantle haholo. Ke thepa isotactic polypropylene fapane le ka holimo-o ile a hlalosa 'me a na le modulus phahameng tsa elasticity, segokanyipalo lona fihla 910 lik'hilograma / m³, ha qhibiliha mocheso ranges ho tloha 165 ho 170 ° C. Ka ea mofuta ona e polypropylene e tšoauoa ka ho hanyetsa babatsehang ho lik'hemik'hale.

'Meleng le ho phetha molao feela thepa

Kajeno ho tloaelehile haholo ho sebelisa polypropylene. The qhibiliha ntlha ya boitsebiso boo e fapaneng ho tloha dimela motho. hangata ha ho, e bapisoa le nhua polyethylene, empa polypropylene hase joaloka batho ba phahameng segokanyipalo, ke 0,91 g, / cm³. Ho feta moo, Polypropylene thatafalletsa le manganga ho abrasion, 'me ke manganga ho thempereichara e.

Level e qala softening ho pota 140 ° C, athe qhibiliha mocheso fihla 175 ° C. Ts'enyeho petsoha ea lintho tse bonahalang tse e sa a senola. Ho tsitsitseng ho oksijene le leseli, Leha ho le joalo, nahanela ena e fokotsehile ha metsoako stabilizers le tla li ekeletsoa ka tlhahisong ea polypropylene.

Libakeng tse fapaneng ea indasteri ea sebedisa bangata ba mefuta ya polypropylene kajeno. The qhibiliha ntlha ya boitsebiso boo atolosa sebaka sa kopo. Elongation ka khefu ka peresente ya ka ho fapane ho tloha 200 ho ea ho 800%. Fe matla a ka tsitsipano lekanang le moedi wa 250 ho ea ho 350 kgf / cm². Tshusumetso matla le hapa ranges ho tloha 33 ho 80 kgf · cm, / cm², athe Brinell thatafala e pakeng tsa 6 le wa 6.5 kgf / mm².

Ka sehloohong thepa lik'hemik'hale

Haeba u rera ho reka lihlahisoa ho tloha polypropylene, ntlha ya qhibiliha ea lintho tse bonahalang, u lokela ho tsejoa. About hae ntseng e tšohloa sehloohong se. Sona ka sebele u ka ithuta le thepa tse ding lik'hemik'hale. Mohlala, lintho tse bonahalang tse ke lik'hemik'hale setaleng solvents manyolo le hanyenyane feela swells eona. Ha mocheso o phahama ho 100 ° C, e nkhang hamonate hydrocarbon tse bonahalang qhibiliha. Tabeng ena ke potso ea toluene le benzene.

Ka lebaka la hore ho polypropylene na le e phahameng k'habone liathomo, e manganga ho oksijene le tlas'a tšusumetso ea mahlaseli mahlaseli le thempereichara e phahameng. Sena se etsa hore tšekamelo ea ho ba hōlileng e le bapisoa le nhua polyethylene. Tlas'a tšusumetso ea libakeng mabifi polypropylene ha ba thata joaloka nhua polyethylene, e tlas'a ho petsoha. O khona ho feta liteko bakeng sa ho petsoha esita le tlas'a khatello ea kelello.

Ntlha qhibiliha ea lipeipi polypropylene

hangata ha ho, ea kajeno moreki thahasellong ea polypropylene qhibiliha mocheso. Lipeipi e amehang, haeba u rera ho phetha Ntlafatso ea tsamaiso ea futhumatsang. Ha o ile a pepesa ho thempereichara e ea 140 ° C, lintho tse bonahalang tse tla ba bonolo 'me ka tsela e lahleheloang sebopeho lona. Athe haeba mocheso o tsosoa ho boemo ba 170 ° C, e qhibilihang mohato se hlahile. Ka nako e tšoanang e tla khaotsa ho ba o tiileng le ho felloa ke matla a ho boloka sebopeho lona le songolo.

tsamaiso ea futhumatsang joalo boemong ba mocheso e sa balwa, kahoo tsamaiso phepelo ea metsi ka methapo polypropylene tse loketseng. Ka tloaelo ho, bahlahisi ba bolela hore ho palo e kahodimodimo khoneha mocheso oa liphaephe polypropylene e 95 ° C. Products ka mamella a godimo a boemo ba mocheso, empa ka nako e khutšoanyane. Haeba nako e telele ho sebelisoa ha phala ea ho mocheso e moholo ho 100 ° C, bophelo tšebeletso ea bona e tla fokotseha.

Ha mocheso marotholi polypropylene tla fapana ka boholo. Ha halefile, ho tla atolosa le ka Cooling - ikhule. Tlas'a tšusumetso ea lipeipi e phahameng mocheso ka 'na qala ho sag pakeng bindings le ka lera le ka ntle, o tla hlokomela ho ruruha.

Makolopetso sebelisa methapo polypropylene

Ho batla e ka boela ea sebelisoa ka lintho tsa polypropylene. The qhibiliha ntlha ea lipeipi joalo ka 'na ba e fapaneng. Sena se lokela ho nkoa ha sehlahisoa pele u PN20 cha. Tabeng ena ke phala, mocheso ho sebetsa ea tsona e 60 ° C. Empa ha e tluoa tabeng ea ho PN25 sehlahisoa, ho bontša hore ho tla ba khona ho mamella mocheso ho fihlela ho 95 ° C.

bofello

Ka ntle ke e sireletsehileng ea ho bolela hore lumeletsoeng ka tiiso polypropylene mosi haufi merafong ea. The qhibiliha ntlha ya polypropylene Leha ho le joalo, ha a bontša hore phala ha baa lokela ho sireletsoa. Litsebi nkhothaletsa theko matlafatsoa lihlahisoa, e leng ka tlaase ho moo bonolo hore deformation ka thempereichara e phahameng. Ka lebaka leo, liphaephe lokela ho insulated 'me a sireletsa ekelletsa moo na le lera le ka hare la aluminium kapa fiberglass. Sena se sireletsa phala tloha tjaleho le lelefatsa bophelo ba tšebeletso ea bona.