DSC txiav txim siab ntawm PE pipeline oxidation induction sijhawm (OIT)

DSC txiav txim siab ntawm PE pipeline oxidation induction sijhawm (OIT)

Qhia txog luv luv:

Polyethylene (PE) yeeb nkab nrog tshuaj zoo heev, tsis muaj tshuaj lom, nyob rau hauv chav tsev kub resistant mus rau hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, amines, sodium hydroxide, potassium hydroxide thiab lwm yam chemicals. Polyethylene yeeb nkab yog sib hloov thiab hnyav, thiab dav siv nyob rau txhua qhov chaw ntawm lub neej, xws li dej, roj, cua kub thiab lwm yam.

Polyethylene yeeb nkab yog lub thermal oxygen stability ntawm cov yeeb nkab ntawm kev hloov, brittle tsis ua hauj lwm los ntawm ib qho ntawm lub ntsiab lus tseem ceeb uas nws ncaj qha cuam tshuam lub yeeb nkab lub neej thiab kev pab cuam lub neej; Kev qhia txog cov khoom siv ntawm polyethylene lub cev feem ntau yog ntsuas oxidation induction sij hawm (OIT), qhov hu ua oxidation induction sijhawm yog siv cov yeeb nkab chaw (oxygen, nitrogen, chav tsev sov) yuav tsum hloov pauv hloov kom oxygen thiab nitrogen ceev thiab siab thiab txhim kho qhov kub ntawm ambient txog 10 npaug (200 degrees Celsius) raws li ib tug txhais tau tias, Nyob rau hauv cov huab mob, saib ntev npaum li cas nws yuav siv sij hawm rau cov polyethylene mus rau thermal oxidative stability hloov, uas yog, lub sij hawm yuav tsum tau siv cov khoom oxidation ntawm cov khoom polyethylene , lub sij hawm no yog ntsuam xyuas cov khoom ntawm cov khoom thaum lub caij sib dho, cia, siv, thiab siv Qhov qhia tau tias tsim nyog tshaj plaws ntawm thermal degradation. Qhov ntev ntawm oxidation induction sij hawm OIT, ntev dua cov kev pab cuam lub neej ntawm cov yeeb nkab; nyob rau hauv tsis tooj, lub neej kev pab ntawm lub yeeb nkab yog luv.

Npaj ua tiav :

a) Cim: DSC-100 tshav kub-hom sib txawv soj ntsuam calorimeter;

aluminium crucible; photon; riam.

b) Qauv: PE yeeb nkab; oxygen, nitrogen

c) Lub ntsiab ntawm kev ntsuam xyuas: qauv hnyav: 15 ± 5mg

Qauv Pem: Aluminium crucible

cua sov tus nqi: 20 ℃ / min

Ambient khiav: 100 ml / min

Cov Kauj Ruam:

Tus qauv PE tau muab txiav rau hauv li ntawm 0.2mm xuabmoos, muab tso rau hauv ib qho txhuas crucible, lwm coj ib tug npliag aluminium crucible raws li ib tug siv, ob txhiab crucible tau muab tso rau hauv DSC-100 differential scanning calorimeter taws Coj tuav thiab siv tus tuav. Lub ntsuas kub ntawm qhov hnoos qeev yog 200 ℃ nyob rau hauv kev tiv thaiv ntawm huab cua lossis nitrogen cheeb tsam. Thaum ntsuas qhov kub thiab txias siab txog 200 ℃ , qhov chaw tau hloov mus rau qhov chaw oxygen, qhov kev txiav txim siab ntawm tus qauv ntawm qhov kub txog 200 ℃   thaum pib ntawm lub caij nyoog ntawm lub caij nyoog ntawm cov pa oxygen, lub sijhawm no yog lub yeeb nkab ntawm cov kab hlau oxidation.