Te whakamahinga o ngā piripiri kapia epoxy

Piripiri kapia epoxy(e kiia nei ko te piripiri epoxy, te piripiri epoxy rānei) i puta mai i te tau 1950 pea, neke atu i te 50 tau noa iho. Engari i waenganui o te rautau 20, he maha ngā ariā piripiri, tae atu ki te matū piripiri, te rheology piripiri me te tikanga pakaru piripiri me ētahi atu mahi rangahau taketake kua ahu whakamua, kia tere ai te ahunga whakamua o ngā āhuatanga piripiri, ngā momo me ngā tono. Kei te puta tonu te kapia epoxy me tana pūnaha whakaora me tana mahi ahurei, tino pai me te kapia epoxy hou, te kaihoko whakaora hou me ngā tāpiringa, kua noho hei akomanga piripiri nui me te mahi tino pai, he maha ngā momo, he whānui te urutau.
Haunga ngā kirihou kore-porowhita pēnei i te polyolefin, kāore i te pai te piri o te kapia epoxy, ā, he maha ngā momo rauemi whakarewa pēnei i te konumohe, te maitai, te rino, te parahi: he pai ngā āhuatanga piri o ngā rauemi kore-whakarewa pēnei i te karāhe, te rakau, te raima, me ētahi atu: tae atu ki ngā kirihou whakamahana pēnei i te phenolics, aminos, te polyester kore-mākū, me ētahi atu, nō reira he piripiri whānui e mōhiotia ana ko. He piripiri hanganga te piripiri epoxy mō ngā tono kapia epoxy taumaha.
Te whakarōpūtanga mā ngā āhuatanga whakaora
Piripiri whakamaroke makariri (kāore he piripiri whakamaroke wera). Kua wehea hoki ki:

He piripiri whakamaroke pāmahana iti, he pāmahana whakamaroke <15 ℃;
Piripiri whakamaroke i te pāmahana rūma, pāmahana whakamaroke 15-40 ℃.
Piripiri whakamaroke wera. Ka taea te wehewehe anō kia:
He piripiri whakamaroke pāmahana waenga, he pāmahana whakamaroke tata ki te 80-120 ℃;
He piripiri whakamaroke pāmahana teitei, he pāmahana whakamaroke > 150 ℃.
Ko ētahi atu huarahi hei whakamaroke i te piripiri, pērā i te piripiri whakamaroke māmā, te piripiri whakamaroke mata mākū me te wai, te piripiri whakamaroke huna.

Ko ngā painga o ngā piripiri epoxy e whai ake nei i runga i ētahi atu momo piripiri:

Kapia epoxyKei roto i tēnei rauemi he momo rōpū porowhita me te rōpū epoxy tino hohe, nō reira he kaha te piri ki ngā momo rauemi porowhita pērā i te konganuku, te karāhe, te sima, te rakau, te kirihou, me ētahi atu, inā koa ko ērā he nui te mahi o te mata, ā, i te wa ano he tino nui te kaha piri o te rauemi epoxy kua rongoatia, nō reira he tino teitei tōna kaha piri.
Kāore rawa he matū iti-ngota e puta mai ana i te wā e whakamaroketia ana te kapia epoxy. He iti te whakahekenga o te rōrahi o te paparanga piri, tata ki te 1% ki te 2%, koinei tētahi o ngā momo he iti rawa te whakahekenga whakamaroketia i roto i ngā kapia thermosetting. I muri i te tāpiri i te whakakī ka taea te whakaiti ki raro iho i te 0.2%. He tino iti hoki te tauwehenga whānui o te rauemi epoxy kua whakamaroketia. Nō reira, he iti te ahotea o roto, ā, he iti noa te pānga ki te kaha o te piri. Hei tāpiri, he iti te toronga o te rauemi epoxy kua whakamaroketia, nō reira he pai te pumau o te āhua o te paparanga piri.
He maha ngā momo kapia epoxy, ngā matū whakaora me ngā mea whakarerekē, ka taea te hanga me te pūkenga kia pai ai te tukatuka i te piripiri me te ngāwari o te tukatuka (pēnei i te whakaora tere, te whakaora i te pāmahana rūma, te whakaora i te pāmahana iti, te whakaora i te wai, te matotoru iti, te matotoru teitei, me ētahi atu), me te whakamahi i te mahi e hiahiatia ana (pēnei i te ātete ki te pāmahana teitei, te pāmahana iti, te kaha teitei, te ngāwari teitei, te ātete ki te koroheketanga, te kawe hiko, te kawe aukume, te kawe wera, me ētahi atu).
He pai te hototahitanga me te tauhohenga o ngā momo matū waro (monomer, resin, rapa) me ngā matū kore-waro (pēnei i ngā whakakī, me ētahi atu), he ngāwari ki te copolymerization, te hononga whakawhiti, te whakaranu, te whakakī me ētahi atu whakarerekētanga hei whakapai ake i te mahi a te paparanga piripiri.
He ātete pai ki te waikura me ngā āhuatanga hiko-kore. He ātete ki te waikawa, te kawakore, te tote, ngā whakarewa me ētahi atu mea waikura. Ko te ātete rōrahi he 1013-1016Ω-cm, ko te kaha hiko-kore he 16-35kV/mm.
He maha ngā takenga mai o ngā kapia epoxy whānui, ngā kaihoko whakaora me ngā tāpiringa, he nui te hanga, he ngāwari ki te hanga, ka taea te whakamahi i te pehanga whakapā, ā, ka taea te whakamahi i runga i te tauine nui.

Me pēhea te whiriwhirikapia epoxy

I te wā e whiriwhiri ana i te kapia epoxy, he maha ngā āhuatanga hei whakaaroaro, tae atu ki:

Whakamahinga: Ka taea te whakamahi i te epoxy mō ngā mahi whānui, mō ngā mahi ahumahi rānei?
Te roa o te wā e whakamahia ai te epoxy i mua i te whakamaroke?
Te Wā Whakamaroke: Kia pēhea te roa ka whakamaroke te hua, ka whakamaroke katoa mā te whakamahi i te epoxy?
Mahana: I tēhea pāmahana ka mahi te wāhanga? Mena e hiahiatia ana te āhuatanga, kua whakamatautauria te epoxy kua tīpakohia mō ngā pāmahana tino teitei?

Ngā Āhuatanga: