Dab tsi yog qhov nta ntawm cov khoom PP?
- Mar 01, 2018 -

Dab tsi yog qhov nta ntawm cov khoom PP?


Cov khoom hauv lub cev:

Polypropylene yog non-toxic, ntxhiab, ntxhiab tsw thiab crystalline heev polymer. Nws ntom xwb 0. 90--, "0. 91g / rm". Nws yog ib qho ntawm lub teeb pom kev ntau yam ntawm tag nrho cov khoom yas. Nws yog qhov ruaj khov rau dej, thiab dej haus dej hauv cov dej tsuas yog 0. O1%, thiab qhov hnyav ntawm molecular yog kwv yees li 8 nyob rau hauv case ntawm 150 txhiab. Zoo molding, tab sis vim yog qhov loj shrinkage (1% ~ 2.5%). Tuab cov khoom siv phab ntsa yog ib qho yooj yim rau txoj cai, rau qee qhov kev txiav txim siab 22 qhov khoom siv:

Tshaj siab dua yog qhov nyuaj rau kev ua raws li cov cai. Lub gloss ntawm qhov saum npoo ntawm cov khoom yog zoo thiab nws yog ib qho yooj yim xim.

Lub crystallinity ntawm polypropylene yog siab thiab cov qauv yog tsis tu ncua, yog li nws muaj zoo mechanical zog. Qhov tseem ceeb ntawm cov khoom siv hluav taws xob ntawm polypropylene yog siab tshaj qhov ntawm polyethylene, tab sis nws tseem belongs rau ib tug ntau yam nyob rau hauv cov ntaub ntawv yas, thiab nws lub zog tensile muaj peev xwm ncav cuag 30 MPa los yog me ntsis siab dua. Yogotactic polypropylene muaj zog dua tensile zog

Muaj zog, tab sis nrog kev nce ntawm lub isotactic index, qhov ua tau zoo ntawm cov khoom poob, tab sis nws poob rau ib qho nqi thiab tsis hloov lawm.

Kub thiab loading tus nqi muaj ib tug zoo cawv rau lub toughness ntawm polypropylene. Thaum lub ntsuas kub siab tshaj qhov ntsuas ntawm vitrification, qhov cuam tshuam tsis zoo no puas zuaj pob, thiab qhov kub yog qhov tawg ntawm qhov kub ntawm vitrification, thiab qhov ua rau lub zog txo qis heev. Kev nce tus nqi nce tau tuaj yeem ua rau qhov hloov ntawm qhov kev rhuav tshem ntawm pob zeb tawg kom txhav tawg. Polypropylene muaj kev nplua zoo heev, thiab nws cov khoom yuav raug nplua 106 zaus ntawm qhov kub tsis muaj kev puas tsuaj.

Tab sis nyob rau hauv chav tsev kub thiab tsawg kub, feem zog lub zog yog pluag vim nws high molecular qauv. Qhov feem ntau cov kev ua tau zoo ntawm polypropylene yog qhov tsis kam rau bending nkees, feem ntau hu ua 100% nplaum.


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