Monga zinthu zophatikizika,utomoni wa polyester wosakhutayagwiritsidwa ntchito bwino popaka utoto, mapulasitiki olimbikitsidwa ndi ulusi wagalasi, miyala yopangira, ntchito zamanja, ndi zina. Komabe, chikasu cha utoto wa unsaturated resin chakhala vuto kwa opanga. Malinga ndi akatswiri, zomwe zimayambitsa chikasu cha unsaturated resin ndi izi:
1. Pa nthawi yopangira esterification ya utomoni wosakhuta, chifukwa cha kutentha kwachikasu komwe kumachitika chifukwa cha kutentha kwambiri, kutentha kwa utomoni wosakhuta ndi 180 ~ 220 ° kapena kupitirira apo, kutentha kumeneku utomoni umakhala wosavuta kusandulika wachikasu chifukwa cha kutentha kwa kutentha, zomwe zimakhudza mawonekedwe a zinthu za utomoni.
2. Kuwoneka kwachikasu komwe kumachitika chifukwa cha kuwonekera kwa utomoni ku kuwala kwa ultraviolet kumachitika makamaka chifukwa cha kukhalapo kwa mphete za benzene mu utomoni (kuphatikizapo aromatic dibasic acids/anhydride ndi mphete za benzene zomwe zimayambitsidwa ndi styrene), zomwe zitha kukhala chifukwa cha kutentha kwa mankhwala a aromatic kutentha kwambiri. Kuwonongeka, kumatha kusintha kwamagetsi, zomwe zimapangitsa utomoni kukhala wachikasu.
3. Pakupanga utomoni, zinthu zopangira zimakhudzidwa ndi mpweya chifukwa cha kusagwira bwino ntchito kwa chipangizocho. Unyolo wa mamolekyu wa polyester wosakwanira suli ndi magulu a ester okha, magulu a meridian, ndi magulu a antelope, komanso ma bond awiri ndi mphete zonunkhira. Zimawonongeka ndi kutentha kwa okosijeni, ndipo magwiridwe antchito owonekera ndi akuti mtundu wa utomoni umasintha kukhala wachikasu.
4. Mphamvu ya zowonjezera monga ma antioxidants, zoletsa polymerization, zochiritsa, ndi zina zotero. Ma antioxidants a amine amasinthidwa mosavuta kukhala ma nitrooxide free radicals kuti asinthe mtundu wa chinthucho. Zoletsa polymerization zomwe zimagwiritsidwa ntchito kwambiri, monga hydroquinone, ndi Oxidation kukhala ma quinones pamaso pa ma quinone, omwe nawonso ali ndi mtundu, motero zimakhudza mtundu wa utomoni. Opanga ena opanga zochiritsa amagwiritsabe ntchito machitidwe a acyl peroxide-tertiary amine ndi machitidwe a sopo achitsulo a ketone peroxide. Utomoni wosavuta kusiyanitsa utoto.
Inde, pali zifukwa zina zomwe zimapangitsa kuti utomoni ukhale wachikasu. Kawirikawiri, mpweya wotentha ndi kuwala kwa ultraviolet ndiye zifukwa zazikulu zomwe zimapangitsa kuti utomoni ukhale wachikasu. Dibasic acid yokhuta (kapena acid anhydride) imagwiritsidwa ntchito m'malo mwa aromatic dibasic acid (kapena acid anhydride), ngakhale kuti ingagwiritsidwe ntchito pamlingo winawake, mtundu wa utomoni ukhoza kukhala wopepuka, koma poganizira zinthu zosiyanasiyana monga magwiridwe antchito a utomoni ndi mtengo wake, njira iyi si yabwino.
Malinga ndi akatswiri, kuwonjezera pa kudzaza mpweya wosagwira ntchito popanga ndi kusunga kuti mpweya usakhudze momwe mungathere, njira yothandiza kwambiri ndiyo kuwonjezera ma antioxidants ndi ma ultraviolet absorbers, zomwe zingalepheretse bwino chikasu cha polyester yochedwa. Mayankho otsutsana ndi chikasu omwe amalimbikitsidwa ndi akatswiri a ma resin osakhutitsidwa ndi awa:
Ma antioxidants omwe alibe ma amine amasankhidwa, ndipo ma antioxidants oyamba ndi othandizira amagwiritsidwa ntchito pamodzi. Ma antioxidants oyamba nthawi zambiri amakhala ma phenols oletsedwa, omwe amatha kugwira ma free radicals a peroxide; ma antioxidants othandizira ndi ma phosphites, omwe Pamene akuwononga hydroperoxide, amathanso kuwononga ma ayoni achitsulo kuti ateteze utomoni kuti usasinthe mtundu. Ngati mukufuna kupititsa patsogolo kukana kwachikasu ndi kukana kwa nyengo, tikukulimbikitsani kuwonjezera choletsa UV. Kuwonjezera choletsa UV kungalepheretse bwino chikasu cha zinthu za polymer pansi pa mphamvu ya ultraviolet rays, ndikupereka chitetezo chabwino kwambiri ku chinthucho, kuteteza bwino kuchepetsa kunyezimira, kupanga ming'alu, thovu, ndi delamination kumatha kusintha kwambiri kukana kwa nyengo kwa chinthucho, ndipo kumakhala ndi mphamvu yabwino yogwirizana ikagwiritsidwa ntchito limodzi ndi ma antioxidants. Zachidziwikire, kugwiritsa ntchito ma antioxidants ndi ma UV absorber sikungathe kuthetsa vuto la chikasu, koma mkati mwa mtundu wina, kumathabe kuletsa chikasu cha okosijeni cha zinthu za polyester zosakhuta, kusunga madzi a chinthucho kukhala owonekera, ndikukweza mtundu wa chinthucho.
Zathuunsaturated polyester resinsZilipo m'mitundu yosiyanasiyana, komanso ma resini osachita chikasu, motere:
Timapangansofiberglass direct roving,mphasa za fiberglass, maukonde a fiberglass, ndinsalu yoluka ya fiberglass.
Lumikizanani nafe:
Nambala ya foni: +8602367853804
Email:marketing@frp-cqdj.com
Webusaiti: www.frp-cqdj.com
Nthawi yotumizira: Meyi-10-2022
