Monga composite material,unsaturated polyester utomoniwakhala akugwiritsidwa ntchito bwino zokutira, mapulasitiki opangidwa ndi galasi fiber, miyala yokumba, ntchito zamanja, ndi zina. Komabe, mtundu wachikasu wa unsaturated resins wakhala vuto kwa opanga. Malinga ndi akatswiri, zomwe zimayambitsa chikasu cha unsaturated resins ndi izi:
1. Panthawi ya esterification kaphatikizidwe ka unsaturated resin, chifukwa cha kutentha kwa kutentha kwa chikasu chifukwa cha kutentha kwakukulu, kutentha kwa esterification kwa unsaturated resin ndi 180 ~ 220 ° kapena kupitirira apo, pa kutentha uku utomoni ndi wosavuta kutembenukira chikasu chifukwa cha ukalamba wotentha, zomwe zimakhudza maonekedwe a unsaturated resin.
2. Kutentha kwachikasu komwe kumabwera chifukwa cha kuyanika kwa utomoni ku kuwala kwa ultraviolet kumayamba makamaka chifukwa cha kupezeka kwa mphete za benzene mu utomoni (kuphatikizapo zonunkhira za dibasic acid / anhydrides ndi mphete za benzene zomwe zimayambitsidwa ndi styrene), zomwe zingakhale chifukwa cha kutentha kwa okosijeni kwa mankhwala onunkhira pa kutentha kwakukulu. Kuwonongeka, kumakonda kusintha kwamagetsi, kupanga utomoni wachikasu.
3. Popanga utomoni, zopangira zimawululidwa ndi okosijeni chifukwa cha kusasindikiza bwino kwa chipangizocho. Ma molekyulu a polyester wamba wa unsaturated samangokhala ndi magulu a ester, magulu a meridian, ndi magulu a antelope, komanso zomangira ziwiri ndi mphete zonunkhira. Imawonongeka ndi kutentha kwa oxidative, ndipo zowonekeratu ndikuti mtundu wa utomoni umasanduka wachikasu.
4. Chikoka cha zowonjezera monga antioxidants, polymerization inhibitors, machiritso othandizira, etc. Amine antioxidants amasinthidwa mosavuta kukhala nitroxide free radicals kuti apange utoto wa mankhwala. Ma polymerization inhibitors omwe amagwiritsidwa ntchito kwambiri, monga hydroquinone, ndi Oxidation kukhala quinones pamaso pa quinones, omwe ali ndi mtundu, motero amakhudza mtundu wa utomoni. Ena opanga machiritso amagwiritsabe ntchito makina a acyl peroxide-tertiary amine ndi makina a sopo azitsulo a ketone peroxide. Utoto wamitundu, wosavuta kutulutsa.
Inde, pali zifukwa zina zomwe zimapangitsa kuti utomoni ukhale wachikasu. Nthawi zambiri, mpweya wotentha ndi kuwala kwa ultraviolet ndizomwe zimayambitsa chikasu. Saturated dibasic acid (kapena acid anhydride) amagwiritsidwa ntchito m'malo mwa onunkhira dibasic acid (kapena asidi anhydride), ngakhale angagwiritsidwe ntchito pamlingo wakutiwakuti, mtundu wa utomoni ukhoza kukhala wopepuka, koma poganizira zinthu zosiyanasiyana monga utomoni ntchito ndi mtengo, njira imeneyi si yabwino.
Malinga ndi akatswiri, kuwonjezera pa kudzaza mpweya wa inert mu kupanga ndi kusunga ndondomeko kuti muteteze kukhudzana ndi okosijeni momwe mungathere, njira yowonjezereka ndiyo kuwonjezera ma antioxidants ndi ma ultraviolet absorbers, omwe amatha kuteteza chikasu cha polyester yochedwa. Njira zothana ndi chikasu zomwe akatswiri amalangizidwa ndi unsaturated resins ndi:
Ma Antioxidants omwe alibe ma amine amasankhidwa, ndipo ma antioxidants oyambirira ndi othandizira amagwiritsidwa ntchito pamodzi. Ma antioxidants oyambirira nthawi zambiri amalepheretsa ma phenols, omwe amatha kugwira peroxides free radicals; ma antioxidants owonjezera ndi ma phosphites, omwe Ngakhale akuwola hydroperoxide, amathanso kunyenga ma ayoni achitsulo kuti ateteze utomoni kuti usawonongeke. Ngati mukufuna kupititsa patsogolo kukana kwachikasu ndi kukana kwa nyengo, ndi bwino kuwonjezera chowumitsira UV. Kuonjezera chotsitsa cha UV kungathe kulepheretsa chikasu cha zipangizo za polima pansi pa cheza cha ultraviolet, ndikupereka chitetezo chabwino kwambiri kwa mankhwala, kuteteza bwino Kuchepetsa gloss, kubadwa kwa ming'alu, thovu, ndi delamination kungathandize kwambiri kukana kwa nyengo ya mankhwala, ndipo imakhala ndi zotsatira zabwino za synergistic zikagwiritsidwa ntchito pamodzi ndi antioxidants. Zachidziwikire, kugwiritsa ntchito ma antioxidants ndi ma UV absorbers sikungathetse vuto la chikasu, koma mkati mwamtundu wina, kumatha kuteteza chikasu cha okosijeni cha zinthu za polyester, kusunga mtundu wamadzi wamadzi wowonekera, ndikuwongolera mtundu wazinthu. kalasi.
Zathuunsaturated polyester utomoniamapezeka m'mitundu yosiyanasiyana, komanso ma resin opanda chikasu, motere:
Timapangansofiberglass Direct roving,magalasi a fiberglass, fiberglass mauna, ndimagalasi opangidwa ndi fiberglass.
Lumikizanani nafe:
Nambala yafoni: +8602367853804
Email:marketing@frp-cqdj.com
Webusayiti: www.frp-cqdj.com
Nthawi yotumiza: May-10-2022
