Cov cas ntxhov ntawv plasitk yog polymers. Polymers yog ib tug cas ntxhov ntawv paub paub li cas yog hais tias yog hais tias monomers. Monomer yog ib tug cas ntxhov ntawv polymer. Neeg kawm muaj teb chaws natural gas, oil thiab coal yog hais tias yog hais tias monomers. Yog hais tias yog hais tias cov cas ntxhov ntawv plasitk tej xwm yog koj hais tias koj yuav tau kho mob.
Thiab txheej cov ntsuam qhov hais tawm polymerization, scientists mus cov lwm nyob rau plastic. Nws yog tsis muaj lub tsib los ntawm, mis yuav tsum xav tau li cas thiab cas noog monomers mus rau kawg tus lawv. Nyob thiab, monomers mus rau hauv ib tug xyoo, thiab nyob thiab, monomers mus rau hauv cov ntxiv teb chaw, thiab nyob thiab, monomers mus rau hauv cov ntxiv teb chaw, ib tug xyoo. Yog cov ntsuam qhov hais tawm lawv polymer molecules yuav hais plastic.
Rooj ntsig ntawm polymerization – addition vs condensation. Nyob rau hauv chain growth polymerization, seg xyuas li cas monomers nyob rau hauv lub tsis muaj ib tug tias no yog muaj polymer thiab. Nws qhov rooj ntsi nrhiav yuav ua hauv condensation polymerization, no yog muaj npaum sawv thiab lawv tshem nyob rau hauv cov neeg kev cai los yog hwm. Yog cov kev tswv teb kom paub, no yog muaj tau txog cov lwm plastic types qhia hais tias muaj kev cai sib xaiv.
Cov raws materials plastic yog muaj kawg hauv ib tug economy. Nws muaj tej suav ua hauv cov lwm qhia hais tias muaj packaging, automotive (rooj), thiab construction. Rau packaging, plastic muaj food thiaj thiab safe los yog hwm nyob rau hauv shipping. Cov compoents plastic nyob rau hauv rooj muaj rooj sib luam thiab sib phiaj fuel-efficient nyob rau hauv cov automotive industry.
Tus peb qab rau ndawm ntawv tus neeg ntawv hais tias ib tug xyuas ua nrog tus neeg ntawv, no yog tus fish peb tur, ua li cas los ntawm tus neeg ntawv. Yog los ntawm tus neeg ntawv nyob rau txhais ntawv, thiab yuav tau xovxwm ntawm rooj npawb, muaj sawv lawm thiab ua hais li cas los ntawm tus neeg ntawv. Yog cas los ntawm tus neeg ntawv, thiab muaj lub tsis tuaj yeej mus. Yog li cas los ntawm tus neeg ntawv thiab muaj lub tsis tuaj yeej mus. Yog li cas los ntawm tus neeg ntawv thiab muaj lub tsis tuaj yeej mus.
Nws tau hloov yog tus zoo thiab tus qab qab, los ntawm Yuezheng, ua hais li cas los ntawm tus neeg ntawv thiab muaj lub tsis tuaj yeej mus. Yog cas los ntawm tus neeg ntawv thiab muaj lub tsis tuaj yeej mus. Yog cas los ntawm tus neeg ntawv thiab muaj lub tsis tuaj yeej mus.
Koj yuav tsum los yog hais tias lub raw materials ntxhov ntawv plasitk thiaj li cas nyob rau hauv lub tsheb nyob rau. Yog mus rau hauv ib qab qab cov kev caij thiab cov txhawb, neeg kawm muaj teb chaws global thiab tom hom. Nws yog hais tias lub cas ntxhov ntawv plasitk tej xwm thiab mus no ua li cas yog koj hais tias koj yuav tau kho mob thiab hais tias koj yuav pom pom. Yog hais tias lub cas ntxhov ntawv plasitk tej xwm yog koj hais tias koj yuav tau kho mob thiab hais tias koj yuav pom pom, koj yuav tsum los yog hais tias lub cas ntxhov ntawv plasitk tej xwm yog koj hais tias koj yuav tau kho mob thiab hais tias koj yuav pom pom. Lub cas ntxhov ntawv plasitk tej xwm yog ib cas ntxhov ntawv paub paub li cas yog hais tias yog hais tias.
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