Polypropylene - yanyunguduka tembiricha, zvivako uye unhu

Polypropylene kuva utsotso pfungwa izvo zvinofanira kuzivikanwa kuti kana muchida kushandisa mashoko pachake zvinangwa, muri non-polar chakaita zvokugadzirwa thermoplastic polymer raiva mukirasi polyolefins.

nokuti zvinyorwa

Mumwe anozivikanwa polypropylene sezvo chigadzirwa kuti propylene polymerization. The acho chena ruvara uye chine chimiro. Izvi rakagadzirirwa nokuda polymerization kuti propylene. Polymerization rinoitwa pasi pokudzora kumanikidzwa 10 atmospheres, tembiricha anodzokororwa mukati 80 ° C.

Molecular marongerwo uye utsotso pfungwa

Polypropylene, utsotso pfungwa izvo uchanzi pazasi, rudzi samolecular mamiriro rakakamurwa zvitatu mhando:

• atactic;
• syndiotactic;
• isotactic.

Atactic polypropylene - pfuma rabha-kufanana iyo ine yakakwirira mwero fluidity. ayo utsotso ndeyekuti 80 ° C, nepo arambe achirema iri 850 makirogiramu / m³. Izvi zvinhu zvakare dzinoratidzwa yakakwirira solubility mu diethyl Eteri.

It anosiyana zvachiri kubva-pamusoro apa isotactic polypropylene pakuti ane mukuru modulus pamusoro elasticity, ayo arambe achirema rinosvika pa 910 g / m³, nepo utsotso pfungwa iri yepamusoro zvikuru uye anoda kubatsira kubva 165 kusvika 170 ° C. Ichi acho husingakwanisi makemikari.

Physico-zvemaziso zvivako uye nokurondedzerwa

Polypropylene kuva utsotso pfungwa radudzwa pamusoro, vakasiyana polyethylene pamusoro akaderera arambe achirema, inova 0,91 g / cm³. ukoshi ichi zvakajairika kuti mapurasitiki. Zvinorondedzerwa zvikuru zvinhu uye yakasimba, zvinonzi kuratidzwa kuti ane mukuru kuramba abrasion.

Pakati pezvimwe zvinhu, polypropylene, kupisa nemishonga, nokuti inotanga kupfavisa apo tembiricha rinosvika 140 ° C. Utsotso tembiricha iri 175 ° C, uyezve, mashoko ari substantially kwete pachena kusimbisa ngura cracking walnut. Chiedza nemishonga polypropylene sezvo oxygen. Nhanganyaya stabilizer lowers ari nehanya kunyange zvakawanda.

Polypropylene kuva utsotso yamataura vangafarira, kana aunoda kushandisa iyi, kana ruoko achazvikudza zvakasiyana zvichienderana tembiricha uye mutoro chikumbiro nokukurumidza. Rezasi mwero Munotatamura kunonyanya kukosha zvemaziso zvivako. Tensile muchirwadzisa kushushikana zvichisiyana 250 kusvika 400 kgf / cm², nepo elongation panguva yokuzorora kubva 200 kusvika 800%.

Utsotso pfungwa polypropylene jira, iyo yave ambotaurwa, handiyo chete mamirire ayo vanofarira private vatengi. dzimwe nguva vari kunetseka zvikuru uye flexural modulus. In aripo zvakafamba dzinosiyana 6700 kusvika 11900 kgf. Kana goho pfungwa elongation kwakafanana 10-20%. Impact simba pamwe notch ndiko 33-80 kgf masendimita / cm². Brinell pokuoma ndiyo 6-6.5 makirogiramu / mm².

zvoupenyu chikumbiro

Kushandiswa polypropylene iri zvikuru. Mashoko anoshandiswa kugadzira mafirimu pano zvinosanganisira kavha mhando. Pakati pezvimwe zvinhu zvinokosha govera:

• zvikwama;
• pombi;
• epurasitiki nemikombe;
• kavha;
• mashoko unyanzvi michina;
• mhuri nhumbi;
• insulating zvinhu;
• non-rakarukwa jira.

Pakuvaka polypropylene vakawanawo nzira yayo, ipapo rinoshandiswa kuti vibration uye ruzha voga uriri, uyewo hurongwa dziri pakugadzirisa pamusoro zvemichina "zvinoyangarara uriri". Kana polypropylene iri copolymerized pamwe ethylene, non-crystallizable copolymer kunogona kuwanikwa. Inogona kuratidza rabha unhu, iro rine kuramba kukwegura uye ane kumusoro namakemikari nemishonga.

Nokuti kupisa uye vibration zvinowanzodavirwa kushandiswa akavandudza polypropylene. Utsotso tembiricha yacho polypropylene jira pamusoro apa, zvisinei, ichi hachisi chete unhu kuti unofanira kufarira asati vanotenga zvigadzirwa izvi zvinhu. Zvinofanira kuva kuziva kuti chokuwedzera polypropylene kwazvo zvakafanana ehupfumi kuti polyethylene furo. Asi EPS inogona kutsiviwa ane decoration Profile extrusion kuti kuwedzerwa polypropylene. Nokuti caulking, mugwagwa coatings, kuvakwa adhesives, mastics uye kunama mafirimu anowanzoshandiswa atactic polypropylene. Makuriro Akaita polypropylene muRussia akanga sezvinotevera:

• 38% - midziyo;
• 30% - shinda;
• 18% - firimu;
• 6% - pombi;
• 5% - polypropylene machira;
• 3% - Other.

Utsotso kurehwa mapaipi polypropylene

Utsotso kurehwa mapaipi polypropylene - mumwe unhu avo, iyo kazhinji kufarira yazvino mutengi. Izvi zvinhu anotanga kupfavisa pa 140 ° C apo uchanyangadika - 175 ° C. The wokupedzisira nzira - ndiwo tembiricha yacho chaipisa hwemvura. Kana isu funga nhamba iyi polypropylene inogona kushandiswa chero mvura hurongwa naro mvura zvifambiswe pamwe pamadiro yakakwirira tembiricha.

Asi zvinhu hazvisi nyore panyaya iyi. The ductility anoita sezvi- chepfungwa zvinhu. Polypropylene pa zororo ane elongation iyo zvichisiyana mukati kuwanda 200 kusvika 800%. Izvi zvinoratidza kuti kana nenyere zvichashaya imwe kurema, ipapo chigadzirwa achapiwa kuwedzerwa mugomba refu chubhu, uye ipapo terminates.

In mhedziso: hunhu polypropylene

The ehupfumi pamusoro polypropylene, zvainyanya uye hunhu ichi zvinhu kuchaita kuti vazvionere voga chii nharaunda zvakanakisisa kurishandisa. Isotactic polypropylene zvino uri kuonekwa sezvo rakakurumbira indasitiri. Izvi imhaka zvaidiwa-siyana zvinhu, mamiriro chaiwo apo mapoka divi vari CH3, riri kujairika noruremekedzo kuti huru cheni. bhora kwakadaro rinotsanangurwa neunhu zvinofanira dzinounzwa pakati pavo: kukwanisa kuramba chimiro zvaro dzakakwirira tembiricha kwoukukutu uye yakakwirira simba.