Ka wehewehe ʻana o ka plastic ma kemika (I)

Aʻo maʻamau mākou e pili ana i nā plastics ma ke ʻano o ka helehelena, ka waihoʻoluʻu, ka ʻāʻī, ka nui, a me nā mea ʻē aʻe.

ʻO ka resin synthetic ka mea nui o ka plastic, a ʻo kāna ʻike i loko o ka plastic he 40% a 100%.Ma muli o ka nui o nā mea a me nā waiwai o nā resins e hoʻoholo pinepine i nā waiwai o nā plastics, manaʻo pinepine ka poʻe i ka resins e like me ka plastics.
ʻO ka plastik kahi pūhui polymer i hana ʻia me ka monomer ma ke ʻano he mea maka a polymerized e ka hoʻohui a i ʻole ka hopena polycondensation.ʻO kona kū'ēʻana i ka deformation he haʻahaʻa, ma waena o ka fiber a me ke kāpili.Hoʻokumu ʻia ia me nā mea hoʻohui e like me nā mea hana a me nā puaʻa.

Ka wehewehe ʻana a me ka hoʻohui ʻana: ʻO ka plastik kekahi polymer organik synthetic a semi-synthetic paha.I nā huaʻōlelo ʻē aʻe, loaʻa mau ke kalapona a me ka hydrogen i ka plastic, ʻoiai aia nā mea ʻē aʻe.ʻOiai hiki ke hana ʻia nā plastics mai kahi kokoke i nā polymer organik, ʻo ka hapa nui o nā plastics ʻoihana i hana ʻia mai nā petrochemical.ʻElua ʻano ʻano plastic thermoplastics a me thermoset polymers.ʻO ka inoa "plastic" pili i ka plasticity, ka hiki ke hoʻololi me ka haki ʻole.ʻO nā polymers i hoʻohana ʻia no ka hana ʻana i nā plastics ʻaneʻane hui pū ʻia me nā mea hoʻohui, me nā kala, plasticizers, stabilizers, fillers, a me nā mea hoʻoikaika.Hoʻopili kēia mau mea hoʻohui i ka haku mele, kemika a me nā waiwai mechanical o nā plastics, a me ke kumukūʻai.
Thermosets and Thermoplastics: Thermoset polymers, i ʻike ʻia hoʻi he thermosets, hoʻōla i ke ʻano mau loa.He amorphous lākou a manaʻoʻiʻo ʻia he paona molekala pau ʻole.ʻO nā Thermoplastics, ma ka ʻaoʻao ʻē aʻe, hiki ke hoʻomehana ʻia a hoʻololi hou ʻia.ʻO kekahi mau thermoplastics he amorphous, aʻo kekahi he ʻāpana crystalline.Loaʻa nā paona molekala ma waena o 20,000 a me 500,000 AMU i nā Thermoplastics.