Propylene narkewa batu: halaye da kaddarorin

Propylene ne thermoplastic polymer na propene. Wannan aka shirya bisa ga fasahar da Polymerization na propylene amfani catalysts na karfe. Don samun wannan abu sigogi kamar irin waɗanda a da samar high yawa polyethylene.

Dangane da abin da irin mai kara kuzari amfani, shi ne zai yiwu a sami wani irin polymer ko garwayayye daga gare ta. Da narkewa batu na propylene - shi ne daya daga cikin muhimman halaye na wannan abu. Yana yana da nau'i na fararen foda ko granules, da girma yawa daga abin da aka canza zuwa 0, 5 g / cm³. The bayyana abu iya canza launin, ko uncolored stabilized.

Bayani dalla-dalla: kwayoyin tsarin

Domin propylene da kwayoyin tsarin ne zuwa kashi da dama jinsunan, daga gare su:

• isotactic.
• ataxic.
• syndiotactic.

Stereoisomers abu da ya bambanta a jiki, inji da kuma sinadaran halaye. Alal misali, atactic propylene yana da nau'i na roba-kamar abu, wanda shi ne halayyar high fluidity. Da narkewa batu na propylene for extrusion a cikin wannan yanayin ne game da 80 ° C, yayin da yawa na iya kai wani matakin na 850 kg / m³.

A diethyl ether da kayan dissolves sosai. By Properties isotactic propylene bambanta daga sama-aka bayyana da kuma yana da babban modulus na elasticity, ta yawa kai 910 kg / m³, yayin da narkewa zafin jiki jeri daga 165 zuwa 170 ° C. A wannan irin propylene ne halin da kyau kwarai da juriya ga sunadarai.

Jiki da kuma inji Properties

A yau shi ne sosai na kowa yin amfani da propylene. Da narkewa batu na wannan abu ne daban-daban daga cikin mutum jinsunan. Popular sau da yawa, shi ne idan aka kwatanta polyethylene, amma propylene ba kamar yadda high yawa, shi ne 0,91 g / cm³. Bugu da ƙari, propylene ne wuya da kuma resistant zuwa abrasion, kuma shi ne resistant zuwa yanayin zafi.

Level shi farawa softening a kusa da 140 ° C, alhãli kuwa da narkewa zafin jiki ya kai 175 ° C. Lalata fatattaka daga cikin kayan da aka ba fallasa. Shi ne barga zuwa oxygen da haske, duk da haka, wannan ýan an rage idan sinadaran cakosoban za a kara a cikin yi na propylene.

A bangarori daban-daban na masana'antu da amfani da yawa iri-propylene yau. Da narkewa batu na wannan abu yana faɗaɗa yanki na aikace-aikace. Elongation a hutu a wani kaso za a iya bambanta daga 200 zuwa 800%. Yawa ƙarfi a tashin hankali daidaita da iyaka na 250 zuwa 350 kgf / cm². Impact ƙarfi da daraja jeri daga 33 zuwa 80 kgf · cm / cm², alhãli kuwa da Brinell taurin ne tsakanin 6 da kuma 6.5 kgf / mm².

Babban sinadaran Properties

Idan ka shirya saya wasu kayayyakin daga propylene, da narkewa batu na littattafai, dole ne ka sani. Game da ta da aka tattauna a cikin labarin. Daga shi za ka iya koyi da sauran sinadaran Properties. Alal misali, abu ne chemically barga a cikin kwayoyin kaushi da kawai dan kadan ta kumbura shi. Idan da yawan zafin jiki yakan zuwa 100 ° C, da aromatic hydrocarbon abu narkar. A wannan yanayin shi ne mai tambaya na toluene da benzene.

Domin dalilin cewa propylene ƙunshi manyan carbon atoms, shi ne resistant zuwa oxygen a ƙarƙashin rinjayar ultraviolet radiation kuma dagagge yanayin zafi. Wannan sa hali ya tsufa kamar yadda idan aka kwatanta da polyethylene. Ƙarƙashin rinjayar m yanayin propylene ba kamar yadda wuya kamar yadda polyethylene, an hõre fatattaka. Shi ne iya sha gwaje-gwaje domin fatattaka ko da a karkashin danniya.

Da narkewa batu na propylene bututu

Popular sau da yawa, na zamani mabukaci amfani propylene narkewa zafin jiki. Bututu yake kula, idan ka shirya gudanar da wani kyautata na dumama tsarin. Lokacin da fallasa zuwa yanayin zafi na 140 ° C, da kayan zama taushi da kuma ta haka ne da shi hasarar da siffar. Ganin cewa idan da yawan zafin jiki ne tãyar da su a matakin na 170 ° C, da narkewa mataki na faruwa. A daidai wannan lokaci shi zai gushe a m da kuma rasa ikon riƙe da siffar da kuma bayani dalla-dalla.

Tsarin dumama a cikin irin wannan zafin jiki matakin ba lasafta, don haka samar da ruwa tsarin a propylene shambura su dace. Yawanci, masana'antun da'awar cewa matsakaicin yiwu zafin jiki na propylene bututu ne 95 ° C. Products iya tsayayya da wani babbar zazzabi matakin, amma a takaice. Idan tsawo da yin amfani da bututu a zazzabi mafi girma daga 100 ° C, su sabis rayuwa za ta rage.

Lokacin da yawan zafin jiki saukad propylene zai bambanta a size. Lokacin da mai tsanani, shi zai fadada da kuma a kan sanyaya - ƙyama. Ƙarƙashin rinjayar high zafin jiki bututu iya fara zuwa sag tsakanin bindings kuma a cikin matsanancin Layer, za ka lura da kumburi.

Nuances amfani propylene shambura

The search ƙila za a yi amfani da articles na propylene. Da narkewa batu na irin wannan bututu iya zama daban-daban. Wannan ya kamata a gani, idan da samfurin kafin ka PN20 iri. A wannan yanayin shi ne wani bututu, da aiki zazzabi wanda shi ne 60 ° C. Amma a lokacin da ta je PN25 samfurin, shi ya nuna cewa shi zai iya yin tsayayya da yanayin zafi har zuwa 95 ° C.

ƙarshe

Tare da lafiya ne hadari a ce cewa izini hatimi propylene hayaki kusa da mahakar. Da narkewa batu na propylene, duk da haka, ba ya nuna cewa bututu kamata ba za a kare. Masana sun bayar da shawarar sayen karfafa kayayyakin, wanda suke kasa da saukin kamuwa zuwa nakasawa a high yanayin zafi. Saboda haka, ya kamata a bututu makaran da kuma kare bugu da žari da wani ciki Layer na aluminum ko fiberglass. Wannan kare bututu daga fadada kuma tsawanta su sabis rayuwa.