Feem ntau, PVC pawg thawj coj saib yuav tawg thaum lub zog cuam tshuam tshaj qhov toughness quab yuam. Qee lub sij hawm, qhov kub thiab txias heev yuav txo qhov longitude thiab toughness, thiab ob peb lub zog ntxiv thiab toughening agents kuj yuav ua rau puas yooj yim. Yog tias qhov ua haujlwm kub siab dhau thiab qis dhau, nws yooj yim rau tawg tsis muaj cov nyhuv plasticizing zoo. Niaj hnub no, cia peb saib cov khoom ntawm cov khoom siv no.
PVC phaj yog ib hom tshuaj phaj. Cov khoom siv yog mos heev, yog li qhov hnyav ntawm PVC cov khoom yog me me thiab nws yooj yim txav. Lub txee ua los ntawm cov khoom siv tshuaj no tsis nqus dej, tsis tuaj yeem nthuav thiab deform zoo li ntoo. Tab sis nws cov ntsiab lus formaldehyde yog siab heev, yog li nws yog cov khoom muaj kuab paug hnyav. Tsis tas li ntawd, cov khoom siv PVC muaj qhov tsis zoo, tsis yooj yim fading thiab kub tsis kam.
1. qhov ceev ntawm ntshiab polychlorinated nitrobenzene yog 1.4g/cm. Qhov ceev ntawm PVC yas qhov chaw uas muaj cov yas yas thiab muab tub lim yog feem ntau 1.15-2 00g/cm.
2. Rig PVC board muaj zoo tensile, dabtsi yog khoov, compression thiab tej yam khoom, thiab yuav siv tau raws li cov khoom siv ib leeg.
3. lub softness, elongation ntawm so thiab txias tsis kam ntawm mos PVC board yuav nce, tab sis lub brittleness, hardness thiab tensile zog yuav txo.
4. PVC muaj cov hluav taws xob rwb thaiv tsev zoo, tuaj yeem siv los ua cov khoom siv hluav taws xob tsawg tsawg, thiab muaj tshuaj lom neeg zoo. Vim qhov tsis zoo thermal stability ntawm PVC, cua sov rau lub sij hawm ntev yuav ua rau decomposition, tso hydrogen chloride gas, thiab discoloration ntawm polychlorinated nitrobenzene. Yog li ntawd, nws daim ntawv thov ntau yog nqaim, thiab daim ntawv thov kub yog feem ntau ntawm 15 ~ 55 degree.
5. PVC pawg thawj coj saib yog PVC, ib yam ntawm cov khoom yas synthesized los ntawm 43 feem pua roj thiab 57 feem pua ntsev. Piv nrog rau lwm yam khoom yas, PVC siv raw cov ntaub ntawv zoo dua thiab txo cov roj noj. Tib lub sijhawm, kev siv hluav taws xob ntawm PVC kev lag luam kev lag luam kuj tsawg heev. Tsis tas li ntawd, cov khoom siv PVC tuaj yeem rov ua dua thiab hloov mus rau lwm yam khoom tshiab los yog incinerated kom tau txais lub zog siv tom qab.
