Kushandiswa kwepurasitiki inobvisa antioxidants ndiyo imwe yenzira dzinoshanda dzekunonotsa kushatisa kana kuti thermo{{0}oxidative kuchembera kwemarara epurasitiki nezvigadzirwa. Zvakangodaro-chinangwa cheantioxidants kana chepamusoro-chinodzivirira antioxidants dzimwe nguva chinonetsa kuzadzisa zvinodiwa zvepamusoro-kugadziridza tembiricha uye kushandiswa, uye dzimwe nguva hazvidhure-. Kusarudzwa kwemutengo-unoshanda antioxidants kunoda kutarisisa kwakadzama kwechimiro chemolecular resin yepurasitiki, maitiro epolymerization, kugadzirisa mamiriro uye kushandiswa kwechigadzirwa.
Panguva yekugadzira nekutumira-kugadziridzwa kwematomu epurasitiki, pamwe nekugadzirisa nekushandiswa kwezvigadzirwa zvepurasitiki, nekuda kwezvinhu zvakaita sekupisa neokisijeni, mapolymer epurasitiki anozoderedzwa kusvika pamadhigirii akasiyana, izvo zvinokanganisa zvakananga chimiro chemuviri, magadzirirwo emagetsi, uye kutaridzika kweresin uye zvigadzirwa. Negative effects paruvara, kushanda, nezvimwewo. Kushandisa ma antioxidants ndiyo imwe yenzira dzinoshanda dzekunonotsa kuparara kana kuchembera kwe thermo-oxidative of resin and products. Iyo yakasiyana-siyana yekushandisa uye huwandu hwekuwedzera hwema antioxidants anonyanya kutsanangurwa neiyo molecular chimiro chepurasitiki resin, polymerization maitiro, kugadzirisa mamiriro uye kushandiswa kwechigadzirwa.
1. Mabasa nemhando dze antioxidants
Nekuda kweakasiyana mamorekuru zvimiro zvemapurasitiki resin, kana iwo akafanana mamorekuru chimiro nekuda kweakasiyana mapolymerization maitiro, maitiro ekugadzirisa, kushandiswa nharaunda uye mamiriro, iyo yekupisa oxidation reaction yekumhanya uye yekupisa oxidation kuramba kwepurasitiki resins zvakasiyana zvakanyanya.
MaAntioxidants anowedzerwa kune epurasitiki resins kunyatso kuvharira kana kuderedza kupisa kwemafuta oxidation reaction rate yeplastiki macromolecules, kunonoka kupisa uye okisijeni kushatisa maitiro epurasitiki resin, zvakanyanya kunatsiridza kupisa kwekupisa kwemapurasitiki resins, kurebesa hupenyu hwebasa rezvigadzirwa zvepurasitiki, uye kugadzirisa mashandisirwo ezvigadzirwa zvepurasitiki. anokosha epurasitiki additives.
Antioxidants ndiyo inonyanya kushandiswa kuwedzera mumapurasitiki. Chekutanga, ma antioxidants anoshandiswa mumatanho akasiyana epurasitiki polymerization, granulation, kuchengetedza, kugadzirisa, kushandisa, uye kudzokorodza. Chechipiri, pakati pemhando dzakasiyana dzemidziyo yepurasitiki ine akasiyana mamorekuru maumbirwo akaonekwa munyika nhasi, senge polyethylene, polypropylene, styrene polymers, engineering mapurasitiki, akakosha mapurasitiki uye zvimwe zvinhu, marudzi mazhinji emidziyo yepurasitiki inoshandisa antioxidants ndeye.
Anowanzo shandiswa epurasitiki maoxidants anowanzo kupatsanurwa muzvikamu zvishanu zvinoenderana nemamorekuru chimiro uye mashandiro echiito: akavharirwa phenols, phosphites, thios, macomposites uye akavharirwa amines (HALS).
Hindered phenol antioxidants ndiwo maoxidants emidziyo yepurasitiki, uye basa rawo guru nderekuita neoxidative radicals R‧ uye ROO‧ inogadzirwa neoxidation mumidziyo yepurasitiki kukanganisa kukura kwemaketani anoshanda. Yakavharidzirwa phenol antioxidants yakakamurwa kuita monophenol, bisphenol, polyphenol, nitrogen heterocyclic polyphenol uye mamwe marudzi zvinoenderana nechimiro chemolecular.
Phosphite antioxidants uye sulfur{{0}ine ma antioxidants ese ari maviri anobatsira antioxidants. Nzira huru yekuita ndeyekuora mahydroperoxides ari mupurasitiki kuita mamorekuru-ekuita. Kugadzirwa kwemumba uye kushandiswa kwephosphite antioxidants kunoda kusvika makumi matatu muzana yehuwandu hwekugadzirwa kwepamba uye kushandiswa kwema antioxidants. Sulfur-ine antioxidants inogadzirwa kuChina inogona kupatsanurwa muzvikamu zvitatu zvinoenderana nechimiro chemolecular: thioester antioxidants, thiobisphenol antioxidants uye thioether phenols.
Mhando dzakasiyana dzekutanga uye dzechipiri maoxidants, kana iwo mhando imwechete yema antioxidants ane akasiyana mamorekuru zvimiro, ane akasiyana mabasa uye mashandisiro ekushandisa, imwe neimwe iine simba rayo uye kushaya simba.
Iyo composite antioxidant inoumbwa maviri kana anopfuura antioxidants emhando dzakasiyana kana akasiyana emhando imwe chete. Inogona kudzidza kubva kune mumwe nemumwe mune zvepurasitiki zvinhu uye kuratidza synergistic mhedzisiro. Thermo-oxidative aging effect. Synergistic effect inoreva kuti kana maviri kana anopfuura ekuwedzera akashandiswa pamwe chete, mhedzisiro yekushandiswa yakakura kupfuura huwandu hwemhedzisiro yechimwe nechimwe chinowedzera chinoshandiswa chega, ndiko kuti, 1+1﹥2.
Yakavharirwa amine stabilizers ikirasi yeorganic amine komisheni ine steric hindrance athari, ine ina synergistic kudzikamisa mabasa ekuora hydroperoxide, kudzima nyika inonakidza okisijeni, kutora mahara radicals, uye kudzokorodza pachayo. Zvikanzi mamolecular uremu akavhariswa maamine anoshanda zvakanyanya uye akareba{1}}anogara ari maoxidants, pamwe chete nemwenje inodzikamisa chiedza. Mazhinji emaminetsi akavharidzirwa anobva pa2,2,6,6-tetramethyl-4-piperidinyl boka.
2. Kusarudzwa kweplastiki antioxidants
Kupisa kwakaringana kunofanirwa kupihwa panguva yekumisikidzwa kwemarara epurasitiki, post-kugadziriswa kana kugadzira zvigadzirwa zvepurasitiki. Kupisa ndicho chimwe chezvikonzero zvikuru zvekuora resin. Kushandiswa kwema antioxidants mu resin polymerization kana post-kugadziriswa kwave kuonekwa zvishoma nezvishoma neindasitiri.
Kushatiswa kwePVC resin kunoperekedzwa neyese maitiro e resin polymerization. Kazhinji, anodzivirira phenol antioxidants akaita se246, 1076, 245, phosphite antioxidants akaita sePKY-618, uye fatty acid zinc, epoxidized soya bean oil, JC{10}}ZH21, zvichingodaro. gadzira hurongwa hwakagadzikana. Pakati pazvo, JC-ZH21 imhando itsva yenitrogen heterocyclic komboni ine mwero wakaderera wekuwedzera, unogona kutora mahara radicals, ine yakanaka kudzikamisa mhedzisiro uye isingadhuri.
Iyo polymerization maitiro eABS, SBS, PS, POM uye mamwe maresin ese anoshandisa antioxidants kana akasanganiswa ekudzikamisa masisitimu, senge thioester antioxidants DLTP, DSTP, phosphite ester antioxidants PKY-136, nezvimwe.
Methyl methacrylate PMMA (inowanzo zivikanwa se plexiglass) ine hunhu hwekugadzikana kwemakemikari, kuita kwakanaka kwekugadzirisa uye yakanakisa optical zvivakwa. Muchikamu chekupedzisira chePMMA synthesis, kurapa kwekushisa kwepamusoro kunowanzoitwa kubvisa zvinhu zvinoputika mu resin. Kana tembiricha iri munzvimbo yepamusoro-yekurapa tembiricha yasvika 220 dhigirii kana kupfuura, mapoka ekupedzisira eunsaturated PMMA molecular cheni akaumbwa nekusaenzana kwemaketani radicals anotanga kudambura zvisungo, PMMA polymer inotanga kuderera, michina yemagetsi uye kujeka kuderera, uye ruvara rweresin inodzikira.
Kuwedzera antioxidants mu post{{0}nzira yekurapa yePMMA inogona kunyatsonatsa thermo-oxidative kugadzikana kwePMMA. Basa rema antioxidants nderekuwedzera tembiricha yekuora kwekutanga uye tembiricha yepamusoro yekuora mwero wePMMA. Yakavharidzirwa phenolic antioxidants inogona panguva imwe chete kuwedzera tembiricha yekuora kwekutanga uye yakanyanya kuparara tembiricha yePMMA. Phosphite antioxidants inogona kungowedzera kupisa kwekutanga kwekuparara kwePMMA, asi haigone kuwedzera tembiricha yepamusoro yekuparara kwePMMA.
Ultra{{0}yakakwirira molecular weight polyethylene faibha (inozivikanwawo sehigh-performance polyethylene fiber, UHMWPE) ine maitiro ekusimba kukuru, high modulus, low specific gravity, kusimba kwechiedza uye kusapfeka zvakanyanya, pamwe nekuramba mvura, kusanaya kwemwando, kusapinda mumvura yegungwa uye huturu. Kusaneta uye kurarama kwenguva refu kunoita kuti ive yekutengeserana yepamusoro-fiber ine simba repamusoro-soro pasi rose.
Tembiricha yekugadzirwa kweultra-yakakwirira molecular weight polyethylene fiber ingangoita 190℃, iyo isingaonekwe setembiricha yakanyanya. Nekudaro, nekuda kweiyo yakakwira yakanyunguduka viscosity, nguva yekugara mu extruder inenge maminitsi gumi, uye nguva yekupisa yakareba. Kana mabhizinesi epamba akashandisa zvakajairika maantioxidant masisitimu ekugadzira, kushatisa kwekupisa kweresin kwakanyanya, huremu hwemamorekuru hunodzikiswa kubva pamamirioni mana kuenda pasi pemamiriyoni matatu, uye simba resiririka rakaderera ne15-20% pane iro resirika inotengeswa kunze kwenyika, uye chitarisiko chakatsvuka. Mushure mekushandisa yakakosha antioxidant JC-211B system, huremu hwemamorekuru haudzike zvakanyanya, simba resiririka rinosvika pamwero wesirika inotengeswa kunze kwenyika, uye kutaridzika kwakachena uye kupenya.
Polypropylene processing, kunyanya kugadzirwa kwepolypropylene filaments, inoda zvakanyanya kuomarara extrusion maitiro, uye tembiricha yekugadziridza yakakwira kupfuura 200 degree. Polypropylene inopisa-mabhegi esimende, mabhegi easphalt, nezvimwewo zvinoda kushandiswa kwenguva yakati tembiricha ingangoita 60 degrees; tembiricha yepamusoro yemabhegi epurasitiki akarukwa anoshandiswa mumhepo yakavhurika muzhizha anogona kusvika 70℃pasi pezuva. Hongrun pigment: 3132 tsvuku tsvuku tsvuku, chiedza chinokurumidza tsvuku BBN, chiedza chinokurumidza kupenya BBC, goridhe chiedza chitsvuku C, chiedza chinokurumidza kupenya 2BP, Lisol magenta 4BP, Lisol Baohong BK, zvachose tsvuku F3RK, tsvuku tsvuku yekusingaperi F5RK, Pigment Red 122, Pigment Red 254, Organic Organic Yellow Perfazi, Organic Organic Yellow Tarfazi Yellow 2G, Permanent Yellow HR, Pigment Yellow 81, Pigment Yellow 110, Pigment Yellow 139, Pigment Yellow 151, Pigment Yellow 180, Permanent Orange G, Pigment Orange 64, Phthalocyanine Blue BGS, Phthalocyanine Yellow , Permanent Piglet 1 Green Violet RL organic pigments. Pakugadzirisa mabhegi epurasitiki epolypropylene akarukwa uye zvinodiwa pakupisa-kusingachinji kushandiswa, kushanda kwepamusoro-uye yakakosha composite antioxidant JC-1225 inogona kupa kugadzirisa kwakanaka uye kushandiswa kugadzikana. Tafura 1 inoratidza shanduko ye melt index ye polypropylene ine akasiyana antioxidants. Mhedzisiro ye antioxidant JC-1225 iri nani pane iyo ye general antioxidant 225.
Kuwedzera masterbatch kune resin kugadzira marudzi ese ezvigadzirwa zvepurasitiki yanga iri nzira inowanzoshandiswa muindasitiri yekugadzira mapurasitiki. Kune zvigadzirwa zvinogadziriswa uye zvinogadzirwa nekuwedzera masterbatches, iyo inotakura resin inoshandiswa mukugadzira masterbatches inozosangana nekupisa kwekupisa uye kusvibiswa kwemagetsi zvakare kana resin inotakura ichipisa zvakare panguva yekugadzira zvigadzirwa zvepurasitiki, izvo zvinokonzeresa uye nekukasira kushandiswa kwechigadzirwa. kupisa, oxygen, uye photoaging. Naizvozvo, kunyangwe iyo chikamu cheanotakura resin mu masterbatch muzvigadzirwa zvepurasitiki haina kukura, dambudziko rekukurumidzira kuchembera kunokonzerwa neyechipiri kana yakawanda kupisa, uye pesvedzero pakukura kwekuita kwezvigadzirwa zvepurasitiki, inofanirwa kukonzera iyo masterbatch Kutarisisa kwemabhizinesi ekugadzira uye mabhizinesi ekugadzirisa zvigadzirwa.
Mumamiriro ezvinhu akajairwa, kune vanogadzira masterbatch uye mabhizinesi anoshandisa zvimwe zvechipiri zvinhu kana zvinhu zvakadzokororwa kugadzira zvigadzirwa zvepurasitiki, musanganiswa wakavharirwa phenolic uye phosphite antioxidants unofanirwa kushandiswa kudzikamisa sisitimu panguva yekugadzirisa.
