amakuru

Nk'ibikoresho bivanze,resin ya polyester idasembuyebyakoreshejwe cyane mu gusiga, gukoresha pulasitiki ikoresha fibre y'ikirahure, amabuye y'ubukorikori, ubukorikori, n'ibindi bikorwa. Ariko, ibara ry'umuhondo ry'amaresini adafite amavuta ryagiye ribera ikibazo abakora. Nk'uko abahanga babivuga, impamvu zisanzwe zitera amaresini adafite amavuta guhinduka umuhondo zirimo izi zikurikira:

1. Mu gihe cyo gukora esterification ya resin idafite amazi, bitewe no gusaza kw'ubushyuhe bitewe n'ubushyuhe bwinshi, ubushyuhe rusange bwa esterification ya resin idafite amazi ni 180 ~ 220 ° cyangwa hejuru yayo, kuri ubu bushyuhe resin yoroshye guhinduka umuhondo bitewe no gusaza kw'ubushyuhe, bigira ingaruka ku isura y'ibicuruzwa bya resin.

2. Umuhondo uterwa no kwinjizwa kwa resin ku mirasire ya ultraviolet ahanini uterwa no kuba hari impeta za benzene muri resin (harimo aside dibasic/anhydride aromatic na benzene rings ziterwa na styrene), bishobora guterwa n'ubushyuhe bw'ibinyabutabire bya aromatic ku bushyuhe bwinshi. Kwangirika, bikunze kubaho impinduka z'ikoranabuhanga, bigatuma resin iba umuhondo.

3. Mu gihe cyo gukora resin, ibikoresho fatizo bihura na ogisijeni bitewe n'imikorere mibi yo kuziba kw'igikoresho. Uruhererekane rwa molekile rwa polyester idafite amazi rugizwe n'amatsinda ya ester gusa, amatsinda ya meridian, n'amatsinda y'impala, ahubwo rugizwe n'imigozi ibiri n'impeta zihumura neza. Irangirika cyane, kandi imikorere igaragara ni uko ibara rya resin rihinduka umuhondo.

4. Ingaruka z'inyongeramusaruro nka antioxydants, polymerization inhibitors, creative agents, nibindi. Antioxydants za amine zoroshye guhinduramo nitrooxide free radicals kugira ngo zigire ibara ry'umusaruro. Izikoreshwa cyane mu gupima polymerization, nka hydroquinone, ni Oxidation muri quinones iyo hari quinones, nazo ubwazo zifite ibara, bityo zigira ingaruka ku ibara rya resin. Bamwe mu bakora creative agents baracyakoresha acyl peroxide-tertiary amine systems na ketone peroxide metal sabune systems. Resin ifite ibara kandi yoroshye gukoresha.

Birumvikana ko hari izindi mpamvu zituma resin ihinduka umuhondo. Muri rusange, ogisijeni ishyushye n'imirasire ya ultraviolet ni byo bintu by'ingenzi bituma ibara ry'umuhondo rihinduka. Aside dibasic yuzuye (cyangwa aside anhydride) ikoreshwa aho gukoresha aside dibasic aromatic (cyangwa aside anhydride), nubwo ishobora gukoreshwa ku rugero runaka, ibara rya resin rishobora koroha, ariko ukurikije ibintu bitandukanye nko gukora resin n'igiciro cyayo, ubu buryo si bwiza.

Nk’uko abahanga babivuga, uretse kuzuza umwuka udafite isuku mu gikorwa cyo gukora no kubika kugira ngo wirinde ko umwuka wa ogisijeni uhura na wo uko bishoboka kose, uburyo bwiza ni ugushyiramo antioxydants na ultraviolet absorbers, bishobora gukumira neza ko polyester idakora neza. Uburyo bw’inzobere bwo kurwanya umuhondo ku ma resin adafite isuku ni ubu:

Antioxydants zidafite amine ziratoranywa, kandi antioxydants z’ibanze n’iz’inyongera zikoreshwa hamwe. Antioxydants z’ibanze akenshi ni fenols zibangamiwe, zishobora gufata peroxide free radicals; antioxydants z’inyongera ni fosfite, iyo iyo iboza hydroperoxide, ishobora kandi gukurura iyoni z’icyuma kugira ngo irinde resin guhinduka oxidative. Niba ushaka kurushaho kunoza ubudahangarwa bw’umuhondo no guhangana n’ikirere, ni byiza kongeramo icyuma gifata UV. Kongeramo icyuma gifata UV bishobora kubuza neza ikintu cy’umuhondo cy’ibikoresho bya polymer bitewe n’imirasire ya ultraviolet, kandi bigatanga uburinzi bwiza ku gicuruzwa, bikarinda kugabanuka k’umuhondo, kubyara uduce duto, uduce duto, no gucikamo ibice bishobora kunoza cyane ubudahangarwa bw’ikirere bw’igicuruzwa, kandi bigira ingaruka nziza zo guhuza iyo bikoreshejwe hamwe na antioxydants. Birumvikana ko gukoresha antioxydants na UV absorbers bitashobora gukemura ikibazo cy’umuhondo, ariko mu rugero runaka, bishobora gukumira neza ubudahangarwa bw’ibicuruzwa bya polyester bidafite oxidative, bigatuma amazi y’igicuruzwa ahora abonerana, kandi bikanoza ubwiza bw’igicuruzwa.

Ibyacuresins za polyester zitarimo ibintu byinshiziboneka mu bwoko butandukanye, ndetse no mu mavuta adahinduka umuhondo, nk'uko bikurikira:

Nanone dukoraurujya n'uruza rw'ibirahuri bya fiberglass,imitako ya fiberglass, urushundura rwa fiberglass, naurujya n'uruza rw'ibirahuri biboshye.

Twandikire:

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