Izvo zvakasiyana-siyana zvepurasitiki zvinotarisa kushandiswa kwayo muindasitiri.Nekufambira mberi kwetekinoroji, kutsvagisa pamusoro pekushandurwa kwepurasitiki hakuna kumira.Ndeapi maitiro makuru epurasitiki?
1. Mapurasitiki akawanda ane uremu hwakareruka, akagadzikana mumakemikari, uye haaite ngura;
2. Good impact kuramba;
3. Iine kujeka kwakanaka uye kupfeka kusagadzikana;
4. Kuchengetedza kwakanaka uye kuderera kwekushisa kwekushisa;
5. Kuumbwa kwakazara uye ruvara kwakanaka, uye mutengo wekugadzirisa wakaderera;
6. Mapurasitiki akawanda ane urombo hwekupisa kupisa, kukwirira kwekuwedzera kwekupisa uye nyore kupisa;
7. Kusagadzikana kwedimensional uye nyore kukanganisa;
8. Mapurasitiki akawanda ane hurombo hushoma hwekushisa, hunoita brittle pakupisa kwakaderera uye nyore kukwegura;
9. Mamwe mapurasitiki anonyungudika nyore muzvinonyungudutsa.
10. Plastiki inogona kugoverwa muzvikamu zviviri: thermosetting uye thermoplastic.Iyo yekutanga haigone kuumbwazve kuti ishandiswe, uye iyo yekupedzisira inogona kugadzirwa zvakare.Thermoplasticity ine kureba kwakakura kwemuviri, kazhinji 50% kusvika 500%.Simba harisiyane zvachose mutsetse pakurebesa kwakasiyana.
Iko kune mhando mbiri dzemamolecular zvimiro zvemapurasitiki: yekutanga ndeye mutsara chimiro, uye musanganiswa wepolymer une chimiro ichi unonzi linear polymer compound;chechipiri chimiro chemuviri, uye musanganiswa wepolymer une chimiro ichi unonzi musanganiswa.Iyo yakawanda polymer compound.Mamwe mapolymers ane cheni dzine matavi, anonzi branched polymers, ayo ari eiyo mutsara chimiro.Kunyangwe mamwe mapolymer ane-cross-links pakati pemamorekuru, asi mashoma-muchinjiko-manongedzo, anonzi network dhizaini, ndeyechimiro chemuviri.
Zvimiro zviviri zvakasiyana, zvichiratidza zvinhu zviviri zvakapesana.Linear chimiro, kupisa kunogona kunyunguduka, kushoma kuoma uye brittleness.Chimiro chemuviri chine kuoma kukuru uye brittleness.Purasitiki ine zvimiro zviviri zvepolymers, thermoplastics yakagadzirwa nemapolymers ane mutsara, uye thermosetting mapurasitiki akagadzirwa neakawanda mapolymer.
Nguva yekutumira: Jul-23-2022