Njengezinto ezidityanisiweyo,i-resin ye-polyester engagcwaliyoisetyenzisiwe kakuhle kwiingubo, kwiiplastiki eziqinisiweyo ngefayibha yeglasi, kwiilitye zokwenziwa, kwimisebenzi yezandla, nakwezinye iindawo. Nangona kunjalo, ukuba tyheli kombala weeresini ezingagcwaliyo bekusoloko kuyingxaki kubavelisi. Ngokutsho kweengcali, izizathu eziqhelekileyo zokuba tyheli kweeresini ezingagcwaliyo ziquka oku kulandelayo:
1. Ngexesha lenkqubo yokwenziwa kwe-esterification ye-resin engagcwaliyo, ngenxa yokuguga okushushu okubangelwa kubushushu obuphezulu, ubushushu obuqhelekileyo be-esterification ye-resin engagcwaliyo yi-180 ~ 220 ° nangaphezulu, kolu bushushu i-resin kulula ukuyijika ibe tyheli ngenxa yokuguga okushushu, okuchaphazela ukubonakala kweemveliso ze-resin.
2. Ukutyheli okubangelwa kukuvezwa kwe-resin kwimitha ye-ultraviolet kubangelwa kakhulu bubukho beeringi ze-benzene kwi-resin (kuquka ii-aromatic dibasic acids/anhydrides kunye neeringi ze-benzene eziveliswa yi-styrene), okunokubangelwa yi-thermal oxidation yee-aromatic compounds kumaqondo obushushu aphezulu. Ukubola, kuthambekele ekutshintsheni kwe-elektroniki, okwenza i-resin ibe mthubi.
3. Kwinkqubo yokuveliswa kwe-resin, izinto ezikrwada zichatshazelwa yi-oksijini ngenxa yokusebenza kakubi kokutywina kwesixhobo. Ikhonkco le-molecular ye-polyester engagcwaliyo ngokubanzi ayinazo kuphela amaqela e-ester, amaqela e-meridian, kunye namaqela e-antelope, kodwa ikwanazo neebhondi eziphindwe kabini kunye neeringi ze-aromatic. Idlula kwi-thermal oxidative degradation, kwaye ukusebenza okucacileyo kukuba umbala we-resin ujika ube mthubi.
4. Impembelelo yezongezo ezifana nee-antioxidants, izithinteli ze-polymerization, ii-curing agents, njl. Ii-antioxidants ze-amine ziguqulwa ngokulula zibe yi-nitrooxide free radicals ukuze zifake umbala kwimveliso. Izithinteli ze-polymerization ezisetyenziswa rhoqo, ezifana ne-hydroquinone, yi-Oxidation ibe yi-quinones xa kukho ii-quinones, ezinombala ngokwazo, ngaloo ndlela zichaphazela umbala we-resin. Abanye abavelisi bee-curing agents basasebenzisa iinkqubo ze-acyl peroxide-tertiary amine kunye neenkqubo zesepha zesinyithi ze-ketone peroxide. I-resin enemibala, elula ukuyifaka umbala.
Kakade ke, kukho ezinye izizathu ezibangela ukuba i-resin ibe tyheli. Ngokubanzi, i-oksijini eshushu kunye nemisebe ye-ultraviolet zezona zizathu ziphambili zokuba tyheli. I-asidi ye-dibasic eyomeleleyo (okanye i-asidi anhydride) isetyenziswa endaweni ye-asidi ye-aromatic dibasic (okanye i-asidi anhydride), nangona ingasetyenziswa kwinqanaba elithile, umbala we-resin unokwenziwa ube lula, kodwa xa kujongwa izinto ezahlukeneyo ezifana nokusebenza kwe-resin kunye neendleko, le ndlela ayifanelekanga.
Ngokutsho kweengcali, ukongeza ekuzaliseni igesi engasebenziyo kwinkqubo yokuvelisa nokugcina ukuze kuthintelwe ukudibana neoksijini kangangoko kunokwenzeka, indlela esebenza ngakumbi kukongeza ii-antioxidants kunye nee-ultraviolet absorbers, ezinokuthintela ngempumelelo ukutyheli kwe-polyester elahliweyo. Izisombululo ezicetyiswa ziingcali zokulwa nokutyheli kweeresini ezingagcwaliyo zezi:
Kukhethwa ii-antioxidants ezingenazo ii-amine, kwaye ii-antioxidants eziphambili kunye nezincedisayo zisetyenziswa ngokudibeneyo. Ii-antioxidants eziphambili zihlala zi-phenols ezithintelweyo, ezinokubamba ii-free radicals ze-peroxide; ii-antioxidants ezincedisayo zii-phosphites, ezithi ngelixa zibola i-hydroperoxide, zinokuphinda zikhuphe ii-ion zesinyithi ukuthintela i-resin ekutshintsheni kombala we-oxidative. Ukuba ufuna ukuphucula ngakumbi ukumelana nokutyheli kunye nokumelana nesimo sezulu, kuyacetyiswa ukuba wongeze i-UV absorber. Ukongeza i-UV absorber kunokuthintela ngempumelelo imeko yokutyheli kwezinto ze-polymer phantsi kwesenzo semitha ye-ultraviolet, kwaye kubonelele ngokhuseleko oluhle kwimveliso, kuthintela ngempumelelo ukunciphisa ukukhanya, ukuveliswa kwemifantu, amaqamza, kunye ne-delamination kunokuphucula kakhulu ukumelana nesimo sezulu semveliso, kwaye inesiphumo esihle sokusebenzisana xa isetyenziswa kunye nee-antioxidants. Ewe, ukusetyenziswa kwee-antioxidants kunye nee-UV absorbers akunakusombulula ingxaki yokutyheli, kodwa ngaphakathi koluhlu oluthile, kusenokuthintela ngempumelelo ukutyheli kwe-oxidative kweemveliso ze-polyester ezingagcwaliyo, ukugcina i-watercolor yemveliso ibonakala ngokucacileyo, kunye nokuphucula umgangatho wemveliso.
Zethuiiresini zepolyester ezingagcwaliyoziyafumaneka kwiindidi ngeendidi zeemodeli, kunye neeresini ezingatyheli, ngolu hlobo lulandelayo:
Sikwavelisai-fiberglass ejikelezayo ngqo,iimathi zefiberglass, i-fiberglass mesh, kwayeukuzulazula okulukiweyo kwefayibha.
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Ixesha lokuthumela: Meyi-10-2022
