Kupu Whakataki

Ko ngā antioxidants (ngā mea whakaū wera rānei) he tāpiringa e whakamahia ana hei aukati, hei whakaroa rānei i te pirau o ngā polymers nā te hāora, te ozone rānei i te āhuarangi. Koinei ngā tāpiringa e whakamahia whānuitia ana i roto i ngā rauemi polymers. Ka pirau te waikura wera o ngā paninga i muri i te tunua ki ngā pāmahana teitei, i te whakaatu rānei ki te rā. Ko ngā āhuatanga pēnei i te koroheketanga me te kōwhai ka tino pā ki te āhua me te mahi o te hua. Hei ārai, hei whakaiti rānei i te putanga mai o tēnei ia, ka tāpirihia ngā antioxidants.

Ko te pakarutanga o te waikura wera o ngā pūmua te take matua o te tauhohenga rauropi kore utu momo mekameka i tīmatahia e ngā rauropi kore utu i hangaia e ngā waiparawaihā ina werahia. Ka taea te aukati i te pakarutanga waikura wera o ngā pūmua mā te hopu rauropi kore utu me te pirau waiparawaihā, e whakaaturia ana i te pikitia i raro nei. I roto i ēnei, ka taea e ngā antioxidants te aukati i te waikura i runga ake nei, nō reira e whakamahia whānuitia ana.

Ngā momo antioxidants

Ngā antioxidantska taea te wehewehe kia toru ngā wāhanga e ai ki ā rātou mahi (arā, ko tā rātou wawaotanga ki te tukanga matū waikura-ā-roto):

ngā antioxidants whakamutunga mekameka: ka hopu, ka tango rānei i ngā rauropi kore utu i hangaia e te auto-oxidation polymer;

ngā antioxidants pirau waiperoxide: ko te nuinga o ēnei ka whakatairanga i te pirau kore-raruraru o ngā waiperoxide i roto i ngā polymers;

ngā antioxidants e whakakore ana i te katote whakarewa: ka taea e rātou te hanga chelates pumau me ngā katote whakarewa kino, ā, ka whakakore i te pānga whakaterenga o ngā katote whakarewa ki te tukanga waikura-aunoa o ngā polymers.

I roto i ngā momo antioxidants e toru, ko ngā antioxidants whakamutu mekameka e kiia ana ko ngā antioxidants tuatahi, ko ngā phenols aukati te nuinga me ngā amines kakara tuarua; ko ngā momo e rua e kiia ana ko ngā antioxidants āwhina, tae atu ki ngā phosphites me ngā tote konganuku dithiocarbamate. Hei whiwhi i tētahi paninga pumau e tutuki ai ngā whakaritenga tono, ka whiriwhiria he huinga o ngā antioxidants maha.

Te whakamahinga o ngā antioxidants i roto i ngā paninga

1. Whakamahia i roto i te alkyd, te polyester, te polyester kāore i te mākū
I roto i ngā wāhanga kei roto i te hinu o te alkyd, he rerekē ngā hononga takirua. Ka ngāwari te waikura i ngā hononga takirua kotahi, ngā hononga takirua maha, me ngā hononga takirua honohono hei hanga i ngā peroxide i ngā pāmahana teitei, ka pouri ake te tae, engari ka taea e ngā antioxidants te wawahi i ngā hydroperoxide hei whakamārama i te tae.

2. Whakamahia i roto i te hanganga o te kaihoko whakaora PU
Ko te tikanga, ko te matū whakaora PU e pā ana ki te prepolymer o te trimethylolpropane (TMP) me te toluene diisocyanate (TDI). Ina pāngia te kapia e te wera me te mārama i te wā e hangaia ana, ka pakaru te urethane hei amines me te olefins, ā, ka whati te mekameka. Mēnā he kakara te amine, ka waikurahia hei quinone chromophore.

3. Te whakamahinga i roto i ngā paninga paura whakamahana
He matū ārai mate whakauru o ngā matū ārai mate phosphite me ngā matū ārai mate phenolic tino whai hua, he pai mō te tiaki i ngā paninga paura mai i te pirau waikura wera i te wā e tukatuka ana, e whakamaroke ana, e wera rawa ana me ētahi atu tukanga. Kei roto i ngā tono ko te polyester epoxy, te isocyanate aukati TGIC, ngā whakakapinga TGIC, ngā matū epoxy raina me ngā kapia kiriaku thermosetting.

He maha ngā momo rauemi e tukuna ana e Nanjing Reborn New Materialsngā antioxidantsmō ngā ahumahi kirihou, paninga, rapa.

I te auahatanga me te ahunga whakamua o te umanga paninga, ka kitea te hiranga o ngā antioxidants mō ngā paninga, ā, ka whānui ake te wāhi mō te whanaketanga. I te heke mai, ka whanake ngā antioxidants i te huarahi o te papatipu ngota whanaunga teitei, te maha o ngā mahi, te whai huatanga teitei, te hou, te hiato, te arotau me te tiaki taiao matomato. Me mahi rangahau hōhonu ngā kaimahi mai i ngā āhuatanga tikanga me te tono kia whakapai tonu i a rātou, kia rangahau hōhonu hoki mō ngā āhuatanga hanganga o ngā antioxidants, me te whakawhanake anō i ngā antioxidants hou me te whai hua i runga i tēnei, ka whai pānga nui ki te tukatuka me te tono o te umanga paninga. Ka nui haere te kaha o ngā antioxidants mō ngā paninga, ā, ka hua mai he painga ōhanga me te hangarau pai rawa atu.