Polypropylene yas qauv thiab cov khoom

Cov qauv qauv ntawm polypropylene yog: [—CH2—CH—] n , uas yog ib qho linear macromolecule, tab sis cov methyl sab saw ntawm polypropylene muaj peb txoj kev sib txawv, uas ua rau nws muaj qib siab ntawm crystallinity. Vim muaj kev cuam tshuam ntawm methyl sab saw, cov khoom ntawm polypropylene thiab polyethylene plastics txawv, feem ntau nyob rau hauv cov nram qab no yam:

1. Kev ruaj ntseg tshuaj zoo dua li polyethylene

Ntxiv nrog rau fuming nitric acid thiab fuming sulfuric acid, nws muaj kev tiv thaiv zoo rau lwm cov tshuaj corrosion. Hauv chav kuaj, 80 feem pua ​​​​sulfuric acid thiab concentrated hydrochloric acid tuaj yeem ncav cuag 100 degree yam tsis tau rhuav tshem polypropylene.

2. Qhov zoo tshaj plaws kub tsis kam

Nws tuaj yeem siv tau ntev ntawm {{0}} degree ; tab sis qhov cuam tshuam lub zog txo qis qis ntawm qhov kub thiab txias, thiab qhov cuam tshuam lub zog ntawm 0 degree yog ib nrab ntawm qhov ntawd ntawm 20 degree.

3. Cua thiab dej permeability qis dua polyethylene.

4. Rigidity thiab tensile lub zog yog zoo dua li polyethylene.

5. Kev taw qhia ncab

Lub zog nyob rau hauv lub tensile kev taw qhia yog txhim kho, khoov kuj yog zoo, qhov yooj yog nce, thiab khoov ib feem yuav tsis tig dawb tom qab 1 lab lub sij hawm ntawm dabtsi yog khoov.

6. Kev laus ua haujlwm tsis zoo dua li polyethylene

Cov saw ntev ntawm polypropylene muaj methyl tertiary carbon atoms, uas tsis ruaj khov. Thaum siv, nws yog ib qho tsim nyog los tiv thaiv "tooj liab puas" los ntawm kev sib cuag mus ntev nrog tooj liab.