Polypropylene - Melting pāmahana, āhuatanga me te āhuatanga

Polypropylene he ira whakakoero e kia mohiotia ki a koutou, ki te hiahia koe ki te whakamahi i te rauemi mō ngā take whaiaro, he kore-neke polymer rewarau waihanga e no ki te piha o polyolefins.

mo te record

Ko tētahi atu polypropylene mohiotia rite te hua o te propylene polymerization. he ma i roto i te tae i te rauemi, me te kua he hanganga mārō. I rite tenei e te polymerization o propylene. kawea Polymerization te roto i raro i te mana o te pēhanga o te 10 atmospheres, tonu te pāmahana i roto i 80 ° C.

hanganga rāpoi, me te ira whakakoero

Polypropylene, te ira whakakoero e wehea o e ka e huaina i raro nei, te momo o te hanganga rāpoi ki e toru ngā momo:

• atactic;
• syndiotactic;
• isotactic.

polypropylene Atactic - he rauemi rapa-rite i he nui rawa o te fluidity. tona ira whakakoero ko 80 ° C, i te kiato ko te 850 kg / m³. Kei te hoki āhuatanga tēnei rauemi e te memehatanga nui i roto i te diethyl Etera.

rere ke te reira i roto i ona āhuatanga i te polypropylene isotactic runga ake-whakaahuatia i roto i taua kua reira he uara tawhiti nui o elasticity, tae tona kiato i 910 g / m³, te mea ko nui teitei te ira whakakoero me te pae i 165 ki te 170 ° C. he ātete ki ngā matū tēnei rauemi.

āhuatanga Physico-hangarau, me ngā whakaritenga

Polypropylene he ira whakakoero i whakahuatia i runga ake, rerekē i te polyethylene o mātotoru raro, i te mea 0,91 g / cm³. he noa hoki kirihou tenei uara. Whakaahuatia atu rauemi me te ake totoka, kua whakakitea ai e te mea he ātete tiketike ki te abrasion.

I roto i te tahi atu mea, polypropylene, wera-ātete, no te mea e haamata te reira ki te fakamolū ina tae te pāmahana 140 ° C. Ko te pāmahana rewa ko te 175 ° C, ano, kei te nui e kore e kitea te rauemi ki te fakamamafa'i waikura hangai. Ko te polypropylene ātete marama rite hāora. Kupu Whakataki stabilizer Whakahekea te tūtohutanga noa atu.

Polypropylene he ira whakakoero ai kia koutou hiahia, ki te whakamahere koe ki te whakamahi i tenei rauemi, ka totoro ka whakahaere rerekē i runga i te tere pāmahana me te tono kawenga rānei. Ko te raro te auau o totoro, te nui te uara o nga āhuatanga aunoa. rerekē kurut whawhati ahotea i 250 ki te 400 kgf / cm², te mea te elongation i whati, ko te i te 200 ki te 800%.

Ko te ira whakakoero o whārangi polypropylene, kua oti nei te whakahuatia i runga ake e kore ko te āhuatanga i hiahia kiritaki tūmataiti anake,. E ētahi wā mo ratou ake, me te flexural uara tawhiti. I roto i te take nei kia rerekē ai i 6700 ki te 11900 kgf. A, no te te tukua mata he ōrite ki te 10-20% elongation. Pānga kaha ki kakari ko 33-80 kgf cm / cm². Brinell pakeke ko 6-6.5 kg / mm².

poi o tono

Ko te whakamahi o te polypropylene ko whānui. Ko te rauemi e whakamahia ana ki te hanga kiriata konei ngā momo tākai. I roto i ētahi atu hua he mea e tika ana ki te tohatoha:

• peke;
• putorino;
• kapu kirihou;
• tākai;
• taipitopito o te taputapu hangarau;
• taonga whare;
• te tuuraa rauemi;
• papanga whatu-kore.

I roto i te hanga o te polypropylene kitea ano tona ara, kua whakamahia ki reira reira mo te wiri me te haruru wehe papa, kia rite ki te pai kia rite ki i roto i ngā pūnaha e e noho i runga i te hangarau "tētē witi". A, no te copolymerized polypropylene te ki ethylene, e taea te whiwhi copolymer kore-crystallizable. Ka taea e whakaatu te reira i āhuatanga rapa, e kua ātete ki te hoholo me he ātete matū tiketike.

Hoki te wera me te wiri te whakamahia whānuitia polypropylene whakawhānui. Ko te pāmahana rewa o te whārangi polypropylene i whakahuatia i runga ake, Heoi, e kore te mea anake te āhuatanga e kia waiho koutou hiahia i mua i te hoko i te hua i tenei rauemi i tēnei. kia hoki kia te reira mōhio e he tino rite i roto i ngā āhuatanga ki te pahuka i polyethylene te polypropylene whakawhānui. Ko taea te whakakapi EPS ki te Tangohanga kōtaha whakapaipai o te polypropylene whakawhānui. Hoki herepuru, coatings ara, adhesives hanga, mastics me kiriata tāpiapia whakamahia pinepine polypropylene atactic. Scope o polypropylene i Russia i rite whai:

• 38% - ipu;
• 30% - miro;
• 18% - kiriata;
• 6% - putorino;
• 5% - pepa polypropylene;
• 3% - Ētahi atu.

Ko te ira whakakoero o putorino polypropylene

Ko te ira whakakoero o putorino polypropylene - ko tetahi o aua āhuatanga, i te mea te nuinga o maha hiahia i roto i te kiritaki hou. tīmata tēnei rauemi ki te fakamolū i 140 ° C i te rewanga - 175 ° C. Ko te kōwhiringa whakamutunga - ko reira te pāmahana o te mamaoa superheated. Ki te whakaaro tatou i tenei tau, e taea te whakamahi i te polypropylene mo tetahi pūnaha supply te wai e ai kawea wai te ki takirihia nui pāmahana.

Ko nga mea e kore e pera ohie i roto i tenei mea. mahi te ukanga hei āhuatanga atu o te rauemi. Polypropylene i whati he elongation e rerekē i roto i te whānuitanga o 200 ki te 800%. tohu tenei e ki e te pāngia te putorino i te tetahi taimaha, na ka kia atu te hua ki te ngongo roa, a ka Aukatihia ai.

I roto i te whakamutunga: ko te āhua o te polypropylene

Ka tukua nga āhuatanga o polypropylene, nga āhuatanga me te āhua o tenei rauemi ki a koe feruri i roto i te mea wāhi, ko te pai ki te whakamahi i te reira. Kei te whai whakaaro mai polypropylene Isotactic inaianei rite te rongonui tino i roto i te ahumahi. Ko e tika ana ki te āhuatanga o te momo o rauemi, te āhuatanga motuhake te wahi i te rōpū taha ko CH3, Kei rerekē ki te faatura ki te mekameka matua tenei. kia taua ao tautuhi huru maitatai taketake kia tohaina i roto ia ratou: ko te kaha ki te pupuri i tona āhua i pāmahana tiketike, pakeke, me te kaha nui.