Ma kēia pukana, hoʻomau mākou i ko mākou ʻike ʻana i ka plastics mai kahi hiʻohiʻona kemika.
Nā waiwai o nā plastics: ʻO nā waiwai o nā plastics e hilinaʻi ʻia ma ke ʻano kemika o nā subunits, pehea e hoʻonohonoho ʻia ai kēlā mau subunits, a pehea e hana ʻia ai.He polymers nā plastic a pau, akā, ʻaʻole nā polymers a pau he plastics.Hoʻokumu ʻia nā polymers plastik me nā kaulahao o nā subunits pili i kapa ʻia nā monomers.Inā hoʻopili ʻia nā monomers like, hoʻokumu ʻia kahi homopolymer.Hoʻopili ʻia nā monomer like ʻole e hana i nā copolymers.Hiki i nā Homopolymers a me nā copolymers ke laina laina a lālā paha.ʻO nā waiwai ʻē aʻe o nā plastics:Hiki iā lākou ke paʻa amorphous, nā paʻa kristal a i ʻole nā mea paʻa semi-crystalline (microcrystals).ʻO nā plastik ka mea maʻamau i nā mea lawe wela a me ka uila.ʻO ka hapa nui he insulators me ka ikaika dielectric kiʻekiʻe.He paʻakikī nā polymers aniani (e laʻa, polystyrene).Eia nō naʻe, hiki ke hoʻohana ʻia nā ʻōpala o kēia mau polymers ma ke ʻano he kiʻiʻoniʻoni (e laʻa me ka polyethylene).Aneane nā plastics a pau e hōʻike ana i ka elongation i ka wā i hoʻoluhi ʻia a ʻaʻole e ola hou ke hoʻomaha ʻia ke kaumaha.Kapa ʻia kēia ʻo "creep".He lōʻihi a hoʻohaʻahaʻa ʻia nā plastik.
ʻO nā mea ʻē aʻe e pili ana i nā plastics: ʻO ka plastic synthetic mua loa ʻo BAKELITE, i hana ʻia e LEO BAEKELAND i ka makahiki 1907. Ua haku pū ʻo ia i ka huaʻōlelo "plastic".'O ka hua'ōlelo "plastic" mai ka hua'ōlelo Helene PLASTIKOS, 'o ia ho'i, hiki ke hana 'ia a ho'ohehe'e 'ia.Ma kahi o hoʻokahi hapakolu o ka plastic i hana ʻia e hoʻohana ʻia e hana i ka ʻeke.Hoʻohana ʻia ke kolu ʻē aʻe no ka ʻaoʻao a me ka paipu.ʻAʻole hiki ke hoʻoheheʻe ʻia ka plastik maʻemaʻe i ka wai a ʻaʻohe mea ʻawaʻawa.Eia nō naʻe, nui nā mea hoʻohui i loko o nā plastics he mea ʻawaʻawa a hiki ke lele i loko o ke kaiapuni.ʻO nā laʻana o nā mea hoʻohui ʻawaʻawa e komo pū me nā phthalates.Hiki i nā polymers non-toxic ke hoʻohaʻahaʻa i nā kemika ke hoʻomehana ʻia.
Ma hope o ka heluhelu ʻana i kēia, ua hoʻonui ʻoe i kou ʻike i ka plastic?
Ka manawa hoʻouna: Sep-17-2022