Chii chinonzi PVC

PVC inonzi polyvinyl chloride, inova polymer yakashongedzwa nevinyl chloride monomer pasi pekuita kweperoxide, azo compounds uye mamwe ekutanga, kana pasi pekuita kwechiedza uye kupisa zvinoenderana nemahara radical polymerization maitiro.PVC ndeimwe yemapurasitiki makuru epasirese-chinangwa, ayo anoshandiswa zvakanyanya mumaindasitiri akasiyana.

Chii chinonzi PVC?PVC chinhu chakajairika muhupenyu.Chii chinonzi PVC chinyorwa?Ngatitarisei nhasi.[PVC] PVC inonyatso polyvinyl chloride, inova polymer yakashongedzwa nevinyl chloride monomer ine peroxide, azo compound uye zvimwe zvinotanga, kana pasi pekuita kwechiedza uye kupisa zvinoenderana nemahara radical polymerization mechanism. .

[maitiro ePVC]: PVC ipfu chena ine amorphous chimiro, uye tembiricha yegirazi i77 ~ 90 ℃.Girazi shanduko ipfungwa yakaoma.Kune PVC poda, girazi shanduko ndeyekuti mukati meiyi tembiricha renji, PVC inoshanduka kubva paupfu chena kuenda kune girazi.Iyo yegirazi PVC ichatanga kuora inosvika 170 ℃.Kusagadzikana kwechiedza nekupisa, nyore kuora uye kugadzira hydrogen chloride.
[kukuvadza kwePVC].Kubva pane maitiro ePVC, tinogona kuona kuti PVC haigone kushandiswa yoga.Mukushanda kwekushanda, stabilizers inofanira kuwedzerwa kuvandudza kugadzikana kwekupisa uye chiedza.Tinofanira kubhadhara zvakanyanya pano.Muna 2017, rondedzero yecarcinogens yakaburitswa nesangano repasi rose rekutsvagisa gomarara reWorld Health Organisation yakatanga kurongerwa kuti itariswe, uye PVC yakaverengerwa murondedzero yemhando nhatu dzecarcinogens.Naizvozvo, muhupenyu hwezuva nezuva, edza kusashandisa PVC midziyo kubata chikafu, ndoda mvura inopisa.

[kushandiswa kwePVC], seimwe yemapurasitiki makuru epasirese-chinangwa, PVC inoshandiswa zvakanyanya mukuvaka, zvigadzirwa zvemaindasitiri, zvinodiwa zvezuva nezuva, dehwe repasi, mataira epasi, dehwe rekugadzira, pombi, waya netambo, kurongedza mafirimu, mabhodhoro. , zvinhu zvinopupuma, zvekuisa chisimbiso, fiber dimension, nezvimwe.