Muaj kev xav hauv zej zog tias cov yas thiab cov yas yog cov khoom sib txawv, txawv ntawm txhua tus hauv qhov ua tau zoo. Allegedly, cov yas yog muaj zog thiab ntawm cov qauv zoo. Yas yog, raws li cov lus no, qis zoo thiab puas yooj yim. Nov yog lus dab neeg thiab tsis muaj dab tsi ntxiv.
Dab tsi ntawm cov khoom siv yog yas
Yas, tseem hu ua yas, yog cov khoom siv organic raws cov khoom siv hluavtaws lossis cov khoom sib xyaw ua ke, cov uas hu ua cov polymers. Plastics raws li hluavtaws polymers tshwj xeeb tshaj yog siv dav hauv kev tsim khoom.
Lub npe heev ntawm cov khoom siv cuam tshuam hais tias nyob rau hauv lub zog ntawm cua sov thiab siab, nws tuaj yeem coj tus yam ntxwv thiab khaws cia tom qab txias lossis tawv. Qhov tseeb, cov txheej txheem ntawm cov yas nws tus kheej yog qhov kev hloov ntawm ib qho khoom siv los ntawm viscous-flow xeev mus rau cov khoom ruaj khov.
Keeb kwm ntawm cov yas
Keeb kwm ntawm kab mob yas pib thaum xyoo 1855. Nws tau los ntawm lus Askiv metallurgist thiab kws tsim tawm Alexander Parks thiab npe hu ua Parkesin. Ib me ntsis tom qab, nws tau txais lwm lub npe - celluloid.
Kev tsim cov plastics li cov khoom siv tau pib nrog kev siv cov khoom ntuj tsim nrog cov khoom yas zoo - zom cov pos hniav thiab shellac. Ib me ntsis tom qab, kev hloov tshuaj hauv cov khoom siv hauv ntiaj teb tau pib siv - roj hmab, nitrocellulose, collagen thiab galalite. Yog li ntawd, lawv cov khoom lag luam tuaj rau kev siv cov khoom siv hluavtaws tag nrho - bakelite, epoxy resin, polyvinyl chloride thiab polyethylene.
Tau ntev, parkesin yog cov cim ntawm thawj lub ntsej muag yas thiab yog tsim los ntawm cellulose kho nrog nitric acid thiab cov kuab tshuaj. Nyob rau lub sijhawm thib ob ntawm xyoo pua puv 19, nws tau feem ntau hu ua kaus ntxhw dag.
Xyoo 1866, Alexander Chaw Ua Si nws tus kheej lub tuam txhab, uas tau koom nrog kev tsim loj ntawm chaw nres tsheb. Tab sis ob xyoos tom qab, nws tau poob nyiaj, raws li chaw nres tsheb tau sim txiav tus nqi ntau lawm, thiab qhov no tau cuam tshuam rau qhov tsis zoo ntawm cov khoom kawg.
Parkesin cov neeg ua tiav yog xylonite, tsim los ntawm Daniel Mus Ua Si, tus qub neeg ua haujlwm hauv Parks, thiab celluloid, uas yog John Wesley Hyatt.
Lub hauv paus ntawm delusion
Yas thiab yas yog tib cov khoom siv. Thiab qhov sib txawv ntawm lawv los tsuas yog los ntawm qhov pom ntawm cov lus Lavxias. "Yas" yog cov npe luv rau yas, tab sis vim yog qhov tshwj xeeb ntawm kev tshaj tawm kev tshaj tawm ntawm cov lus no, cov neeg siv khoom lag luam tau tuaj koom nws cov khoom zoo thiab muaj kev ntseeg tau. Ntxiv mus, ua tsaug rau kev tshaj tawm cov khoom lag luam, cov lus pom tau tsim tias cov khoom lag luam yas raug tsim tshwj xeeb hauv Nyiv Yas, ntawm qhov tod tes, pib raug suav hais tias yog kev nkag tsis yooj yim, tsis yooj yim, nkig thiab txawm tias muaj teeb meem khoom yog tias nws tsim nyob hauv Suav teb lossis thib peb hauv ntiaj teb.
Txoj hauv kev tshaj tawm cov lus qhia txog cov yas cuam tshuam tsuas yog kev pom los ntawm cov neeg siv khoom - zoo lossis tsis zoo - tab sis tsis yog qhov zoo ntawm cov khoom siv no.
