Niaj hnub no, kuv yuav muab ib qho kev qhia luv luv rau koj txog keeb kwm ntawm plastics.

Thawj cov khoom siv hluavtaws ua tiav hauv tib neeg keeb kwm yog phenolic resin ua los ntawm American Baekeland nrog phenol thiab formaldehyde hauv xyoo 1909, tseem hu ua Baekeland yas.Phenolic resins yog tsim los ntawm condensation cov tshuaj tiv thaiv ntawm phenols thiab aldehydes, thiab koom rau thermosetting plastics.Cov txheej txheem kev npaj tau muab faib ua ob kauj ruam: thawj kauj ruam: thawj zaug polymerize rau hauv ib qho kev sib xyaw nrog cov qib qis ntawm polymerization;Cov kauj ruam thib ob: siv kev kho kub kub los hloov nws mus rau hauv cov khoom siv polymer nrog qib siab ntawm polymerization.
Tom qab ntau tshaj li ib puas xyoo ntawm txoj kev loj hlob, cov khoom yas tam sim no nyob txhua qhov chaw thiab txuas ntxiv loj hlob ntawm qhov txaus ntshai.Pure resin tej zaum yuav tsis muaj xim thiab pob tshab los yog dawb nyob rau hauv tsos, yog li ntawd cov khoom tsis pom tseeb thiab txaus nyiam nta.Yog li ntawd, muab cov khoom yas ci xim tau dhau los ua lub luag haujlwm uas tsis tuaj yeem zam ntawm kev lag luam plastics.Vim li cas cov yas tau tsim sai sai hauv tsuas yog 100 xyoo?Feem ntau vim nws muaj qhov zoo hauv qab no:

1. Cov yas tuaj yeem ua rau ntawm qhov loj.(Los ntawmyas pwm)

2. Cov txheeb ze ntawm cov yas yog lub teeb thiab lub zog yog siab.

3. Yas muaj corrosion kuj.

4. Yas muaj qhov zoo rwb thaiv tsev thiab rwb thaiv tsev kub.

Muaj ntau hom yas.Dab tsi yog qhov tseem ceeb ntawm cov thermoplastics?

1. Polyvinyl chloride (PVC) yog ib qho tseem ceeb ntawm cov khoom siv yas.Ntawm lub ntiaj teb sab saum toj tsib plastics, nws lub peev xwm ntau lawm yog thib ob tsuas yog polyethylene.PVC muaj zoo hardness thiab corrosion kuj, tab sis tsis muaj elasticity, thiab nws cov monomer yog lom.

2. Polyolefin (PO), feem ntau yog polyethylene (PE) thiab polypropylene (PP).Ntawm lawv, PE yog ib qho ntawm cov khoom siv yas loj tshaj plaws.PP muaj qhov sib txheeb tsawg, tsis muaj tshuaj lom, tsis muaj ntxhiab thiab muaj cua sov zoo.Nws tuaj yeem siv tau ntev ntawm qhov kub ntawm li 110 degrees Celsius.Pebdiav yasyog ua los ntawm cov zaub mov qib PP.

3. Styrene resins, suav nrog polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS) thiab polymethyl methacrylate (PMMA).

4. Polyamide, polycarbonate, polyethylene terephthalate, polyoxymethylene (POM).Hom yas no tuaj yeem siv los ua cov khoom siv, tseem hu ua cov khoom siv engineering.

Kev tshawb pom thiab siv cov yas tau raug sau tseg hauv keeb kwm annals, thiab nws yog qhov thib ob tseem ceeb invention uas cuam tshuam rau noob neej nyob rau hauv lub xyoo pua 20th.Yas yog qhov txuj ci tseem ceeb hauv ntiaj teb!Niaj hnub no, peb tuaj yeem hais yam tsis muaj exaggeration: "Peb lub neej tsis tuaj yeem sib cais los ntawm yas"!