Chii chinonzi PP zvinhu? Kuongorora kwakadzama kwezvivakwa, mashandisirwo uye zvakanakira zvePP zvinhu
Mumunda wemakemikari uye zvinhu, "chii chinonzi PP" mubvunzo wakajairika, PP ndiyo chidimbu chePolypropylene, inoshandiswa zvakanyanya thermoplastic polymer. Muchikamu chino, tichaongorora zvakadzama zvivakwa, maitiro ekugadzira, nzvimbo dzekushandisa uye zvakanakira zvePP zvinhu kupindura mubvunzo wekuti chii chinonzi PP.
1. Chii chinonzi PP? Basic concepts uye zvivakwa
PP zvinhu, kureva polypropylene, ndeye thermoplastic yakagadzirwa kubva kupropylene monomer kuburikidza nepolymerisation reaction. Iyo ine mutsara dhizaini, iyo inoipa iyo chiyero chekuomarara uye kusimba muhunhu hwayo nekuda kweiyo yakasarudzika molecular cheni chimiro. Polypropylene ine yakaderera density inosvika 0.90 g/cm³, ichiiita imwe yemapurasitiki akareruka, chivakwa chinoita kuti ive yakakodzera kune akawanda maapplication.
Polypropylene inoshingirira mumakemikari zvakanyanya, nekupikisa kwakanyanya kune akawanda acid, mabhesi, munyu uye organic zvinonyungudutsa. Iyo yakakwirira yekunyungudika (yakatenderedza 130-170 ° C) inopa PP zvinhu kugadzikana kwakanaka munzvimbo dzekushisa kwepamusoro uye zvinoita kuti dzisanyanya kuita deformation. Nokudaro, PP zvinhu zvinoshandiswa zvakanyanya mumamiriro ezvinhu anoda kupisa uye kusagadzikana kwekuora.
2. Nzira yekugadzira yePP zvinhu
Kugadzirwa kwezvinhu zvePP zvinonyanya kutsamira pane catalyst tekinoroji uye polymerization maitiro. Yakajairika nzira dzekugadzira polypropylene dzinosanganisira gasi-chikamu polymerisation, liquid-phase polymerisation uye intrinsic polymerisation. Nzira dzakasiyana dzepolymerisation dzinokanganisa huremu hwemamorekuru, crystallinity uye zvemuviri zvimiro zvePP zvinhu, izvo zvinozotarisa nzvimbo yavo yekushandisa.
Mhando dzakasiyana dzepolypropylene, senge homopolymerised polypropylene (Homo-PP) uye copolymerised polypropylene (Copo-PP), inogona kuwanikwa kuburikidza nekugadzirisa mhando yecatalyst uye maitiro ekuita panguva yekugadzira. Homopolymerised polypropylene ine kuomarara kwakanyanya uye kushomeka kwekudzivirira, nepo copolymerised polypropylene inonyanya kuwanda mukushandiswa kwemazuva ese nekuda kwesimba rayo rekuita.
3. Nzvimbo huru dzekushandisa dzePP zvinhu
PP zvinhu zvinoshandiswa mumhando dzakasiyana dzemaindasitiri nekuda kwehukuru hwemuviri uye makemikari zvimiro. Muhupenyu hwezuva nezuva, PP inoshandiswa pakugadzira midziyo yemumba, kurongedza zvokudya, mapaipi uye matoyi, nezvimwewo. Muindasitiri, PP inoshandiswa zvakanyanya mukugadzirwa kwemakemikari mapaipi, mapombi uye mavharuvhu, nezvimwewo zvinhu zvePP zvinoshandiswawo muhuwandu hwakawanda mukugadzirwa kwemucheka, zvigadzirwa zvekurapa uye zvikamu zvemotokari.
Kunyanya muindasitiri yekurongedza, PP yave iyo inosarudzika zvinhu nekuda kwekujeka kwayo uye kushomeka kwekupisa, seyakajairwa yakajeka svutugadzike bhokisi rekuchengetedza chikafu, microwave oven tableware, etc. Kushandiswa kwezvinhu zvePP mune zvekurapa kuri kuwedzerawo, kunyanya majekiseni anoraswa, midziyo yemurabhoritari uye zvimwe zvigadzirwa zvine akanyanya aseptic zvinodiwa.
4. PP zvinhu zvinobatsira uye tarisiro yemusika
PP zvinhu zvinofarirwa zvakanyanya kunyanya nekuda kwehuremu hwayo, huremu hwekupisa, kuramba kwemakemikari uye kuita kwakanaka kwekugadzirisa.PP inewo yakanakisa magetsi ekudzivirira uye hunhu hwekuchengetedza kwezvakatipoteredza, inogona kushandiswa zvakare kuderedza kusvibiswa kwezvakatipoteredza.
Kubva pamaonero emusika, nepfungwa yekusimudzira budiriro uye girinhi kuchengetedzwa kwezvakatipoteredza, kudiwa kwemusika kwezvinhu zvePP kuchawedzera kuwedzera. Polypropylene's recyclability uye yakaderera kabhoni emission hunhu inoita kuti iwedzere kukosha mune akasiyana siyana ari kubuda maapplication, senge manyowa emagetsi uye zvinhu zvine hushamwari.
5. Kuipa uye matambudziko ePP zvinhu
Pasinei nemabhenefiti ayo ari pachena, PP ine zvimwe zvinokanganisa, senge kuderera-kupisa kupikisa kupikisa uye kushomeka kwekudzivirira kune UV mwenje. Mumashandisirwo anoshanda, zvikanganiso izvi zvinogona kuvandudzwa nekusanganisa shanduko, kuwedzera kwe antioxidants uye UV-resistant additives. Nekuvandudzwa kwetekinoroji, tsvakiridzo nekuvandudzwa kwebio-based polypropylene uye yakakwirira-performance copolymers zviri kuenderera mberi, zvichivhura mikana mitsva yekushandiswa kwepolypropylene zvinhu.
Mhedziso
Chii chinonzi PP chinhu? Iyo thermoplastic ine yakanakisa zvivakwa uye huwandu hwakawanda hwekushandisa. Kuburikidza nekuongorora kwakadzama kwezvivakwa zvayo, maitiro ekugadzira, nzvimbo dzekushandisa uye tarisiro yemusika, isu tinogona kuona isingadzoreki chinzvimbo chePP zvinhu mumaindasitiri akasiyana. Nekufambira mberi kwetekinoroji uye zvinodiwa zvekuchengetedza kwezvakatipoteredza, huwandu hwekushandisa hwePP zvinhu hucharamba huchiwedzera, zvichiunza kurerukirwa uye hunyanzvi kuindasitiri yemazuva ano nehupenyu.
Isu tinovimba kuti kuburikidza nekuongororwa kwakadzama kwechinyorwa ichi, iwe une nzwisiso yakadzama yekuti chii PP chinhu.