1. Kwa malo owonera kutentha,polypropylene kutentha kukana ndi apamwamba kuposa polyethylene.Polypropylene kusungunuka kutentha ndi za 40% -50% apamwamba kuposa polyethylene, za 160-170 ℃, kotero mankhwala akhoza chosawilitsidwa pa oposa 100 ℃, popanda mphamvu kunja.Chingwe cha PP 150 ℃ sichimapunduka.Polypropylene imadziwika ndi kachulukidwe kakang'ono, kachulukidwe kake kapamwamba kuposa polyethylene komanso kukhazikika kwapadera.
2. Pakuti amaonera otsika kutentha kukana kusanthula, otsika kutentha kukana wa polypropylene ndi chofooka kuposa polyethylene, 0 ℃ zimakhudza mphamvu ndi theka la 20 ℃, ndi polyethylene Chimaona kutentha zambiri kufika -50 ℃ pansipa;Ndi kuwonjezeka kwa wachibale kulemera maselo, osachepera akhoza kufika -140 ℃.Chifukwa chake,ngati mankhwala ayenera kugwiritsidwa ntchito mu malo otsika kutentha, kapenamomwe ndingathere kusankha polyethylene ngati zopangira.
3. Pakuwona kukana kukalamba, kukana kukalamba kwa polypropylene ndikocheperako kuposa polyethylene.Polypropylene ili ndi mawonekedwe ofanana ndi polyethylene, koma chifukwa ali ndi unyolo wam'mbali wopangidwa ndi methyl, ndizosavuta kukhala oxidized ndi kunyozedwa pansi pa mphamvu ya ULTRAVIOLET kuwala ndi kutentha mphamvu.Mankhwala odziwika kwambiri a polypropylene omwe ndi osavuta kukalamba m'moyo wa tsiku ndi tsiku ndi matumba oluka, omwe ndi osavuta kusweka akakhala padzuwa kwa nthawi yayitali.M'malo mwake, kukana kukalamba kwa polyethylene ndikwapamwamba kuposa polypropylene, koma poyerekeza ndi zida zina, ntchito yake si yabwino kwambiri, chifukwa pali chiwerengero chochepa cha zomangira ziwiri ndi zomangira za ether mu mamolekyu a polyethylene, kukana kwake kwa nyengo sikuli bwino, dzuwa, mvula idzachititsanso kukalamba.
4. Pakuwona kusinthasintha, ngakhale kuti polypropylene ili ndi mphamvu zambiri, kusinthasintha kwake kumakhala kovutirapo, komwe kumakhalanso kopanda mphamvu kukana kuchokera pamalingaliro aukadaulo.

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Nthawi yotumiza: Feb-28-2022