PVC stabilizerszviwedzerwa zvinoshandiswa kuvandudza kugadzikana kwekupisa kwepolyvinyl chloride (PVC) uye macopolymers ayo. Kumapurasitiki ePVC, kana tembiricha yekugadzira yakapfuura 160 ℃, kuora kwemafuta kuchaitika uye gasi reHCl richagadzirwa. Kana isina kudzvinyirirwa, uku kuparara kwekupisa kunowedzera kuwedzererwa, zvichikonzera kuvandudzwa uye kushandiswa kwePVC mapurasitiki.
Zvidzidzo zvakaonekwa kuti kana mapurasitiki ePVC aine hudiki hudiki hwemunyu, sipo yesimbi, phenol, amine inonhuhwirira, uye kumwe kusvibiswa, kugadzirwa kwayo uye kushandiswa hakuzokanganiswe, zvisinei, kuora kwayo kwekupisa kunogona kudzikiswa kusvika pamwero wakati. Izvi zvidzidzo zvinokurudzira kugadzwa uye kuenderera mberi kwePVC stabilizers.
Zvakajairwa PVC stabilizers zvinosanganisira organotin stabilizers, metal salt stabilizers, uye inorganic salt stabilizers. Organotin stabilizers anoshandiswa zvakanyanya mukugadzira zvigadzirwa zvePVC nekuda kwekujeka kwazvo, kumira zvakanaka kwemamiriro ekunze, uye kuenderana. Metal salt stabilizers inowanzo shandisa calcium, zinc, kana barium salts, iyo inogona kupa kugadzikana kwekushisa kuri nani. Inorganic munyu stabilizers akadai tribasic lead sulfate, dibasic lead phosphite, etc. vane kwenguva yakareba thermostability uye yakanaka magetsi ekudzivirira. Paunenge uchisarudza yakakodzera PVC stabilizer, unofanirwa kufunga nezvemashandisirwo emamiriro ePVC zvigadzirwa uye inodiwa kugadzikana zvivakwa. Akasiyana anodzikamisa anozokanganisa mashandiro ePVC zvigadzirwa mumuviri uye mumakemikari, saka kuomarara kuumbwa uye kuyedzwa kunodiwa kuti ive nechokwadi chekukodzera kwezvitsiga. Iyo yakadzama sumo uye kuenzaniswa kweakasiyana PVC stabilizers ndeaya anotevera:
Organotin Stabilizer:Organotin stabilizers ndiwo anonyanya kugadzikana ezvigadzirwa zvePVC. Mishonga yavo ndeye reaction zvigadzirwa zve organotin oxides kana organotin chlorides ine yakakodzera asidhi kana esters.
Organotin stabilizers yakakamurwa kuita sarufa-ine uye sarufa-isina. Sulfur-containing stabilizers 'kugadzikana kwakakosha, asi kune matambudziko mukuravira uye muchinjika-mavara akafanana nemamwe macompound ane sulfur. Non-sulfur organotin stabilizers inowanzobva pane maleic acid kana hafu maleic acid esters. Ivo vanoda methyl tin stabilizers haanyanyi kushanda kupisa stabilizer ane nani kugadzikana kwechiedza.
Organotin stabilizers inonyanya kuisirwa kurongedza chikafu uye zvimwe zviri pachena PVC zvigadzirwa senge mahosi akajeka.
Lead Stabilizers:Yakajairika lead stabilizers inosanganisira anotevera makomisheni: dibasic lead stearate, hydrated tribasic lead sulfate, dibasic lead phthalate, uye dibasic lead phosphate.
Sezvinodzikamisa kupisa, makemikoro emutobvu haakuvadze kunaka kwemagetsi, kunyura kwemvura yakaderera, uye kunze kusamira kwemamiriro ekunze kwezvinhu zvePVC. Zvisinei,lead stabilizersvane zvikanganiso zvakadai se:
- Kuva ne toxicity;
- Kusvibiswa-kusvibiswa, kunyanya nesarufa;
- Kugadzira lead chloride, iyo inoumba mitsetse pane zvakapedzwa zvigadzirwa;
- Heavy ratio, zvichikonzera kusagutsikana huremu / vhoriyamu reshiyo.
- Lead stabilizers anowanzo gadzira PVC zvigadzirwa opaque nekukasira uye discolor nekukurumidza mushure mekupisa kwakasimba.
Pasinei nezvakashata izvi, zvinomisa lead zvichiri kugamuchirwa zvakafara. Nokuda kwekudzivirira kwemagetsi, lead stabilizers inosarudzwa. Kubatsirwa kubva pakuita kwayo kwakawanda, zvigadzirwa zvakawanda zvinochinjika uye zvakaomarara zvePVC zvinoonekwa senge tambo dzekunze tambo, opaque PVC mabhodhi akaomarara, mapaipi akaomarara, matehwe ekugadzira, uye majekiseni.
Metal munyu stabilizers: Yakasanganiswa simbi munyu stabilizersakaunganidzwa eakasiyana makomisheni, anowanzo kugadzirwa zvinoenderana neakananga PVC maapplication uye vashandisi. Rudzi urwu rwekudzikamisa rwakavapo kubva pakuwedzerwa kwebarium succinate uye cadmium palm acid chete kusvika pakusanganiswa kwenyama sipo yebarium, sipo yecadmium, sipo yezinc, uye organic phosphite, ine antioxidants, zvinonyungudutsa, zvinowedzera, plasticizers, colorants, UV absorbers, inopenya. , viscosity control agents, mafuta ekuzora, uye artificial flavour. Nekuda kweizvozvo, pane zvinhu zvakawanda zvinogona kukanganisa maitiro ekupedzisira stabilizer.
Metal stabilizers, senge barium, calcium, uye magnesium haidziviriri ruvara rwekutanga rwePVC zvinhu asi inogona kupa kupisa kupisa kwenguva refu. PVC zvinhu zvakadzikamiswa nenzira iyi zvinotanga yero/orenji, zvozoshanduka zvishoma nezvishoma kuita brown, uye pakupedzisira kuita dema mushure mekupisa nguva dzose.
Cadmium uye zinc stabilizers zvakatanga kushandiswa nekuti zviri pachena uye zvinogona kuchengetedza iwo ekutanga ruvara rwePVC zvigadzirwa. Thermostability yenguva refu inopiwa ne cadmium uye zinc stabilizers yakashata zvikuru kupfuura iyo inopiwa nebarium iyo, iyo inowanzokurumidza kuderera zvachose nechiratidzo chiduku kana chisina.
Pamusoro pechinhu chesimbi reshiyo, mhedzisiro yesimbi munyu stabilizer inoenderanawo neyakasanganiswa yavo yemunyu, izvo zvinonyanya kukanganisa zvinhu zvinotevera: lubricity, kufamba, kujeka, pigment color shanduko, uye kugadzikana kwekupisa kwePVC. Pazasi pane akati wandei akasanganiswa esimbi stabilizers: 2-ethylcaproate, phenolate, benzoate, uye stearate.
Metal munyu stabilizers anoshandiswa zvakanyanya mune yakapfava PVC zvigadzirwa uye yakajeka yakapfava PVC zvigadzirwa senge chikafu kurongedza, zvekurapa zvinodyiwa, uye kurongedza kwemishonga.
Nguva yekutumira: Oct-11-2023