Sechinhu chinosanganiswa,unsaturated polyester resinyakashandiswa zvakanaka mukugadzira, girazi fiber yakasimbiswa mapurasitiki, dombo rekugadzira, mabasa emaoko, uye mamwe minda. Nekudaro, iyo ruvara rweyero yeunsaturated resins yagara iri dambudziko kune vanogadzira. Maererano nenyanzvi, zvinowanzokonzera yellowing ye unsaturated resins zvinosanganisira zvinotevera:
1. Munguva ye esterification synthesis process ye unsaturated resin, nekuda kwekuchembera kweyero kunokonzerwa nekupisa kwakanyanya, general esterification tembiricha ye unsaturated resin iri 180 ~ 220 ° kana kutokwira, pakupisa uku resin iri nyore kushanduka yero nekuda kwekuchembera kwekushisa, inokanganisa kutaridzika kwezvigadzirwa zve resin.
2. Kutsvuka kunokonzerwa nekuonekwa kwe resin kune ultraviolet rays kunonyanya kukonzerwa nekuvapo kwebenzene rings mu resin (kusanganisira aromatic dibasic acids/anhydrides uye benzene rings inounzwa ne styrene), iyo inogona kunge yakakonzerwa nekupisa kwemafuta emakemikari anonhuhwirira pakupisa kwakanyanya. Kushatisa, kunowanzoitika kune zvemagetsi shanduko, zvichiita kuti resin yero.
3. Mukugadzira resin kugadzirwa, iyo yakasvibirira inoratidzwa kune oxygen nekuda kwekusagadzikana kwekuisa chisimbiso kwechishandiso. Iyo molecular chain ye general unsaturated polyester haina chete ester mapoka, meridian mapoka, uye mapoka eantelope, asiwo mabhandi maviri uye zvindori zvinonhuhwirira. Iyo inosangana nekupisa kweiyo oxidative degradation, uye kuita kuri pachena ndekwekuti ruvara rwe resin rwunoshanduka yero.
4. Kufuridzirwa kwezvinowedzera zvakadai se antioxidants, polymerization inhibitors, kuporesa vamiririri, etc. Amine antioxidants inoshandurwa nyore nyore kuva nitroxide yakasununguka radicals kuti iite ruvara rwechigadzirwa. Inowanzo shandiswa polymerization inhibitors, senge hydroquinone, ndeyeOxidation mumaquinone pamberi pequinones, iyo pachayo ine ruvara, zvichikanganisa ruvara rweresin. Vamwe vagadziri vemishonga yekurapa vachiri kushandisa acyl peroxide-tertiary amine masisitimu uye ketone peroxide simbi sipo masisitimu. Ruvara, nyore-ku-ruvara resin.
Ehezve, pane zvimwe zvikonzero zvinoita kuti resin iite yero. Kazhinji kutaura, kupisa kweokisijeni uye ultraviolet mwaranzi ndizvo zvikonzero zvikuru zvekutsvuka. Saturated dibasic acid (kana acid anhydride) inoshandiswa panzvimbo yekunhuhwirira dibasic acid (kana acid anhydride), kunyangwe inogona kushandiswa mune imwe nhanho, ruvara rweresin inogona kuitwa yakareruka, asi tichifunga nezvezvinhu zvakasiyana senge resin kuita uye mutengo, iyi nzira haina kunaka.
Maererano nenyanzvi, kunze kwekuzadza gasi inert mukugadzira uye kuchengetedza nzira yekudzivirira kusangana neokisijeni zvakanyanya sezvinobvira, imwe nzira inoshanda ndeyekuwedzera antioxidants uye ultraviolet absorbers, iyo inogona kunyatso kudzivirira yellowing yepolyester yakanonoka. Nyanzvi-inokurudzirwa anti-yellowing mhinduro dzeunsaturated resins ndeidzi:
MaAntioxidants asina maamine anosarudzwa, uye ekutanga uye anobatsira antioxidants anoshandiswa musanganiswa. Iwo ekutanga antioxidants anowanzo kuvharirwa phenols, anogona kutora peroxide mahara radicals; iyo anobatsira antioxidants iphosphites, iyo Ichiri kuora hydroperoxide, inogona zvakare chelate simbi ions kudzivirira resin kubva kune oxidative discoloration. Kana iwe uchida kuwedzera kuvandudza kuyero kuramba uye kuramba kwemamiriro ekunze, zvinokurudzirwa kuwedzera UV absorber. Kuwedzera muvharidzi weUV kunogona kunyatso kuvharidzira iyo yellowing phenomenon yezvinhu zvepolymer pasi pechiito che ultraviolet rays, uye kupa chengetedzo yakanakisa kune chigadzirwa, kudzivirira zvinobudirira Kuderedzwa kwegloss, chizvarwa chekutsemuka, mabhubhu, uye delamination inogona kuvandudza zvakanyanya kupikisa kwemamiriro ekunze kwechigadzirwa, uye ine yakanaka synergistic mhedzisiro kana ichishandiswa pamwe chete nema antioxidants. Ehe, kushandiswa kwemaoxidants uye maAbsorbing eUV haagone kugadzirisa dambudziko rekuyero, asi mukati meimwe nhanho, inogona kunyatso kudzivirira oxidative yellowing yezvigadzirwa zvepolyester zvisina unsaturated, kuchengetedza chigadzirwa chewatercolor pachena, uye kuvandudza kunaka kwechigadzirwa. giredhi.
Yeduunsaturated polyester resinsanowanikwa mumhando dzakasiyana-siyana, pamwe neasina-yellowing resin, sezvinotevera:
Isu tinogadzirawofiberglass yakananga roving,fiberglass mats, fiberglass mesh, uyefiberglass yakarukwa roving.
Taura nesu:
Nhamba yefoni: +8602367853804
Email:marketing@frp-cqdj.com
Webhu: www.frp-cqdj.com
Nguva yekutumira: May-10-2022
