Polypropylene - Ankagawana kutentha, katundu ndi makhalidwe

Polypropylene ndi mfundo limatsogolera zimene ziyenera kudziwika kwa inu ngati mukufuna kugwiritsa ntchito mfundo zolinga munthu, si a kumalo ozizira kupanga thermoplastic polima zomwe wa gulu la polyolefins.

chifukwa umboni wa

Wina polypropylene kudziwika monga mankhwala a propylene polymerization. Mabukuwa ndi loyera ndipo ali Chomangika. Limeneli linakonzedwa ndi polymerization wa propylene. Polymerization ikuchitika mchikakamizo cha mavuto atmospheres 10, kutentha anakhalabe mkati 80 ° C.

Maselo kapangidwe ndi mfundo limatsogolera

Polypropylene, mpaka kusungunuka kwa amene adzakhale dzina lake pansipa, mtundu wa dongosolo maselo lagawidwa mitundu itatu:

• atactic;
• syndiotactic;
• isotactic.

Atactic polypropylene - ndi mphira ngati zinthu zomwe ali ndi digiri yapamwamba ya fluidity. mfundo zake limatsogolera ndi 80 ° C, pamene osalimba ndi 850 makilogalamu / m³. nkhani imeneyi yodziwika ndi solubility mkulu diethyl efa.

Kumasiyana mu makhalidwe ake kuchokera pamwamba ananena kuti isotactic polypropylene chakuti ali ndi modulus mkulu wa elasticity, kachulukidwe ake ukufika pa 910 g / m³, koma mfundo limatsogolera ndi apamwamba kwambiri ndi ranges kuchokera 165 mpaka 170 ° C. Nkhanizi kugonjetsedwa ndi mankhwala.

katundu Physico-makina ndi specifications

Polypropylene ndi mfundo limatsogolera anali tatchulazi, wosiyana polyethylene wa kachulukidwe m'munsi ndi 0,91 g / cm³. Khalidwe limeneli ambiri mapulasitiki. Anafotokoza zinthu zambiri ndi olimba, timauzidwa kuti ali ndi kukana mkulu kumva kuwawa.

Mwazina, polypropylene, kutentha zosagwira, chifukwa ayamba pansi pamene kutentha ukufika 140 ° C. Limatsogolera kutentha ndi 175 ° C, mopitirira, chuma zayamba si poyera kutsindika dzimbiri akulimbana. Kuwala kugonjetsedwa polypropylene monga oxygen. Chiyambi stabilizer Sachita tilinazo kwambiri.

Polypropylene ndi mfundo limatsogolera inu mukhoza kukhala osangalatsidwa ngati mukufuna kugwiritsa ntchito mfundo imeneyi, pamene anatambasula adzakhala zinthu zosiyana malingana ndi kutentha ndi katundu ntchito liwiro. M'munsi mlingo wa anatambasula kwambiri, mtengo wa katundu mawotchi. Kwamakokedwe kuswa nkhawa zimasiyanasiyana 250 400 kgf / cm², pamene elongation pa yopuma ndi 200 800%.

Limatsogolera mfundo za polypropylene pepala, omwe atchulidwa pamwambapa, si yekha khalidwe lomwe chidwi ogula payekha. Nthawi zina nkhawa ndi flexural modulus. Pankhani panopa zingasiyane 6700 ku 11900 kgf. Pamene zokolola mfundo elongation ndi lofanana 10-20%. Impact mphamvu ndi mphako ndi 33-80 kgf masentimita / cm². Brinell kuuma ndi 6-6.5 makilogalamu / mm².

dera ntchito

Ntchito polypropylene ndi ambiri. The kugwiritsidwa ntchito kuti mafilimu pano mitundu ma CD. Mwa mankhwala ena m'pofunika kuonetsetsa:

• matumba;
• mipope;
• pulasitiki zikho;
• CD;
• mfundo zida luso;
• katundu m'nyumba;
• chimateteza zakuthupi;
• sanali nsalu nsalu.

Pomanga polypropylene anapezanso njira yake, apo izo ntchito kugwedera ndi phokoso kudzipatula mbewu, komanso machitidwe amene yothetsa pa luso "akuyandama pansi". Pamene polypropylene ndi copolymerized ndi ethylene, si crystallizable copolymer akhoza kuwapeza. Iwo akhoza kuonetsa makhalidwe labala, amene ali kukana kukalamba ndipo ali mkulu mankhwala kukana.

Kutentha ndi kugwedera chimagwiritsidwa ntchito kukodzedwa polypropylene. Limatsogolera kutentha kwa pepala polypropylene anali tatchulazi, Komabe, si khalidwe kokha kuti muyenera kukhala ndi chidwi pamaso kugula mankhwala kwa nkhaniyi. Tiyeneranso kudziwa kuti polypropylene kukodzedwa ofanana kwambiri katundu kwa thovu polyethylene. Koma EPS akhoza m'malo ndi kukongoletsa mbiri extrusion wa kukodzedwa polypropylene. Pakuti caulking, zokutira msewu, zomatira zomangamanga, mastics ndi mafilimu yomata kambirimbiri atactic polypropylene. Kuchuluka kwa polypropylene mu Russia anali motere:

• 38% - muli;
• 30% - ulusi;
• 18% - filimu;
• 6% - mipope;
• 5% - polypropylene mapepala;
• 3% - Other.

Mfundo limatsogolera a mipope polypropylene

Limatsogolera mfundo ya mipope polypropylene - ndi la makhalidwe amenewo, chomwe nthawi zambiri ambiri chidwi ogula ano. nkhaniyi akuyamba pansi pa 140 ° C pamene Sungunulani - 175 ° C. Njira lomaliza - ndi kutentha kwa nthunzi koopsa. Ngati tikambirana nambala iyi, polypropylene angagwiritsidwe ntchito iliyonse dongosolo madzi ndi madzi chimadzera ndi kutentha amangosankha mkulu.

Koma zinthu siziri mophweka pa nkhani imeneyi. The ductility amachita ngati mbali zina za nkhaniyo. Polypropylene pa yopuma ali elongation amene zimasiyanasiyana mkati osiyanasiyana 200 800%. Zimenezi zikusonyeza kuti ngati chitoliro adzakhala anakhudzidwa ndi kulemera ena, ndiye mankhwala adzakhala anawonjezera mu paipi yaitali, ndiyeno kumathera.

Pomaliza: chikhalidwe cha polypropylene

The katundu wa polypropylene, makhalidwe ndi chikhalidwe cha nkhaniyi adzalola kuti adzaone zomwe dera bwino ntchito. Isotactic polypropylene tsopano ankamuona ngati wotchuka kwambiri mu makampani. Ichi ndi chifukwa maonekedwe a mitundu chuma, vuto wapadera komwe magulu mbali ndi CH3, ili zachilendo ndi kulemekeza unyolo waukulu. Chotero dera kumatanthauza makhalidwe zofunika ayenera allocated pakati pawo: luso kusunga mawonekedwe ake pa kutentha, kuuma ndi mphamvu yapamwamba.