Isu tinowanzo dzidza nezve mapurasitiki maererano nechitarisiko, ruvara, tension, saizi, nezvimwe, saka zvakadini nemapurasitiki kubva kune kemikari maonero?
Synthetic resin ndicho chinhu chikuru chepurasitiki, uye zvirimo mupurasitiki kazhinji 40% kusvika 100%.Nekuda kwehukuru hwemukati uye zvimiro zvemasisiti anowanzo tarisa zvimiro zvepurasitiki, vanhu vanowanzo tora resin seyakafanana nemapurasitiki.
Plastiki musanganiswa wepolymer unogadzirwa nemonomer seyakagadzirwa uye yakashongedzwa nekuwedzera kana polycondensation reaction.Kupokana kwayo nedeformation kuri pakati nepakati, pakati pefiber nerabha.Inoumbwa nezvinowedzerwa senge maagent uye pigments.
Tsanangudzo yePlastiki uye Kuumbwa: Purasitiki ndeye chero yakagadzirwa kana semi-synthetic organic polymer.Mune mamwe mazwi, plastiki inogara iine kabhoni nehydrogen, kunyange zvimwe zvinhu zvingave zviripo.Nepo mapurasitiki anogona kugadzirwa kubva kunenge chero organic polymer, mazhinji mapurasitiki emaindasitiri anogadzirwa kubva petrochemicals.Thermoplastics uye thermoset polymers marudzi maviri emapurasitiki.Zita rekuti "plastiki" rinoreva purasitiki, kukwanisa kukanganisa pasina kuputsa.Mapolymers anoshandiswa kugadzira mapurasitiki anogara akasanganiswa nezvinowedzerwa, zvinosanganisira colorants, plasticizers, stabilizers, fillers, uye reinforcing agents.Izvi zvinowedzera zvinokanganisa chimiro chemakemikari, chemikemikari uye michina yemapurasitiki, pamwe nemutengo.
Thermosets uye Thermoplastics: Thermoset polymers, inozivikanwawo se thermosets, inorapa kuita chimiro chechigarire.Iwo ari amorphous uye anotendwa kuti ane risingaperi molecular uremu.Thermoplastics, kune rumwe rutivi, inogona kupiswa uye kugadziridzwa zvakare uye zvakare.Mamwe thermoplastics ane amorphous, nepo mamwe ane chikamu chekristaro chimiro.Thermoplastics inowanzova nema molecular weights pakati pe20,000 ne500,000 AMU.
Nguva yekutumira: Sep-17-2022