yas txhais

Cov yas no yog tsim los ntawm cov khoom ua tau raws li cov khoom siv, cov polymer los ntawm polyaddition los yog polycondensation polymerization (macromolecules), feem ntau hu ua yas tawv (plastics) los yog (rein), tuaj yeem hloov cov kab sau thiab daim qauv, uas muaj cov khoom siv hluavtaws thiab cov ciaj, , stabilizer, roj nplua nyeem, xim thiab lwm yam khoom siv.

Lub ntsiab tivthaiv plastics yog resin. Lub sij hawm yog thawj daim tawv nqaij los ntawm cov tsiaj thiab cov nroj tsuag lipid thiab nws lub npe, xws li rosin, shellac, rein tsis yog tov nrog ntau yam additives thiab polymer compounds. Lub reinc ​​khwv yees li ntawm 40% mus rau 100% ntawm tag nrho qhov hnyav ntawm cov yas. Qhov yooj yim cov khoom ntawm plastics yog tsuas yog txiav txim siab los ntawm qhov ntawm resins, tab sis additives kuj ua si ib qho tseem ceeb. Qee cov khoom ua los ntawm cov khoom cua, nrog los sis tsis muaj cov khoom ntxiv, xws li lub ntsej muag thiab polystyrene.

Lub npe hu ua yas, qhov tseeb, nws yog ib hom khoom hluavtaws, qhov zoo ib yam li lub ntuj txhuab hauv cov ntoo thuv, los ntawm kev siv cov khoom xyaw synthesis, thiab hu ua yas.

Lub ntsiab feature

Feem ntau ntawm cov yas yog sib, hnav khov, thiab tsis xeb;

Tej yam yuav ua haujlwm zoo;

Nws muaj kev kaj zoo thiab hnav ua haujlwm;

Kev rwb thaiv kom zoo thiab thermal conductivity tsawg;

Nws muaj qhov kev zoo, zoo xim thiab tsawg ua tus nqi;

Feem ntau ntawm cov khoom uas ploj tsis muaj kev kub hnyiab, siab thermal expansion npaum li cas thiab yooj yim combustion;

Nws muaj tsis ruaj ntseg stability thiab yooj yim deformation;

Feem ntau cov plastics muaj kub tsis kam, brittleness ntawm tsawg thiab kub yooj yim;

Qee cov khoom uas yog cov hmoov hauv cov xos.

Plastics tuaj yeem muab cais ua ob hom: thermosetting thiab thermoplastic. Tus qub tsis tuaj yeem hloov kho thiab tom kawg yuav rov qab ua dua. Lub cev muaj zog ntawm thermal plasticity loj, feem ntau yog 50% ~ 500%. Qhov kev quab yuam tsis txawv ntawm qhov txawv ntawm cov nqi elongation.

Qhov sib txawv ntawm cov khoom uas siv los txiav txim siab nws siv rau hauv kev lag luam. Nrog rau kev kawm ntawm technology, qhov kev hloov kho yas tsis tau tso tseg. Hopefully, nyob rau hauv lub neej yav tom ntej, cov plastics yuav siv ntau dua, thiab txawm hloov steel thiab lwm yam ntaub ntawv, thiab yuav tsis pollute qhov chaw.