'O kahi helu ho'okahe Polypropylene: nā'ano a me nā mea waiwai

'O Polypropylene he polymer thermoplastic o propene. Keia i hoomakaukauiaʻi e like me ka 'ike loea hou a polymerization o propylene ka hoʻohana catalysts o ka mea hiki ke hooheheeia. E loaa keia mea kiko'î a like me ka poe i i ka hua mai la kiʻekiʻe nuʻa polyethylene.

Ma muli o ka ho'ohana'ia o ka catalyst, hiki ke loa'a kahi'ano polymer a hui pū paha me ia. Ka mahele heheʻe i ka wahi o ka polypropylene - o kekahi o ka mea nui ano o keia mea. Ka mea, i ke ano o ke keʻokeʻo ka pauka a me granules, ka bulk nuʻa ua loli no i hiki i 0, 5 g. / Cm³. 'O nā mea i ho'ākāka'ia e hiki ke ho'opili, ho'opa'a'ia, ai'ole'ia.

Nā'ikepili: ke'ano mole

Wahi a ke'ano mole mole, ua māhele'ia ka polypropylene i loko o nā'ano nui, i waena o lākou:

• Ho'omākaukau;
• Atactic;
• Syndiotactic.

He'oko'a nā stereomomers o nā mea i nā'ano o ke kino, mechanical a me ke kino. 'O kekahi la'ana, he'ano like me ka mea'alapalapa, he'ano me ka waipalapa. Ka mahele heheʻe i ka wahi o ka polypropylene no extrusion ma keia hihia mea ma kahi o 80 ° C, oiai i ka pa apŘ ke kau i ka nui o ka 850 kg / m³.

I loko o ka diethyl ether, ua'olu'olu loa kēia mea. Ma nā'āpana e ho'onui'ia ka polypropylene e like'ole me ka mea i luna a he'ano ki'eki'e kona elasticity, hiki i kona 99 kg / m³ ka nui o ke anuanu,'oiai ke'ano o ka'ene'ena hehe'e mai 165 a 170 ° C. I loko o kēia'ano, he'ano'ano kūpa'a ke'ano o nā polygropylene.

Nā kino a me nā mechanical

I kēia mau lā, ma'alahi ka ho'ohana'ana i ka polypropylene. 'O ka pae ho'ohehe'e o kēia mea'oko'a ke'ano o kekahi'ano. Ho'ohālikelike'ia ia me ka polyethylene, akā,'a'ohe ki'eki'e o ka polypropylene, he 0.91 g / cm³. Eia kekahi, he'oi aku ka pa'akikī o ka polypropylene, ke kū'ē i ka abrasion a pale i ka hopena o nā mahana.

'O ka pi'i'ana o kona ho'oulu'ana e ho'omaka i ka 140 ° C, kahi e pi'i ai kahi paehe'e i 175 ° C. 'A'ole hiki ke'ike'ia nā mea i'ike'ia e Corrosive. He kūpono kēia i ka oxygen a me ka mālamalama, akā, emi kēia'ano ke'ake'a inā ho'okomo'ia nā stabilizers i nā mea hana i ka hana'ana o ka polypropylene.

Ma nā'ano he nui o ka'oihana i kēia lā, ho'ohana'ia nā'ano he nui o ka polypropylene. 'O ka pae ho'ohehe'e o kēia mea e ho'onui ana i ka māhele o ka noi. Hiki ke ho'ohālikelike ka pili'ana i ka ha'alē i ka pakeneka mai ke 200 a 800%. Hua ikaika ma ka hoʻopilikia like me ka palena o ka 250 a hiki i 350 kgf / cm². Hopena ikaika me ka notch papa koa mai ka 33 a hiki i 80 kgf · knm / cm², akā, i ka Brinell paakiki mea ma waena o 6 a me ka 6.5 kgf / mm².

Nā'ano kinikino kumu

Inā'oe e ho'olālā e kū'ai i nā huahana mai ka polypropylene, e'ike'oe i ka pae ho'ohehe'e o kēia mea. No ka mea e kūkākūkā'ia ana ma ka puke. Mai laila mai e hiki ai iā'oe ke a'o a me nā mea'oko'a. Eia kekahi la'ana, he pale pa'apa'a ka mea, a ma loko o nā mea ho'omehana honua, he paku wale nō ia. Inā pi'i ka mahana i 100 ° C, a laila, e ho'opau'ia ka mea i loko o nā hydrocarbons aromatic. I kēia manawa, ke kama'ilio nei mākou no'ekoluene a benzene.

No ke kumu o ka polypropylene i loko o nā carbon carbon tertiary, he kū'ono ia i nā hopena o ka oxygen i ka wā e'ike'ia ai i ka radiation ultraviolet a me nā mahana wela. 'O kēia ke kumu o ka ne'e'ana i ka'elemakule ma ka ho'ohālikelike'ana i ka polyethylene. Ma lalo o ka mana o ka media mediapropylene e like me ka ikaika o polyethylene, ua haki. Hiki iā ia ke hō'oia i nā mea hō'oia pilikia.

'O ka mahana ma'amau o nā polpropylene pipes

'O ka pinepine o ka mea kū'ai i kēia manawa he mea makemake i ka māmā o ka polypropylene. Hiki ke ho'ohana'ia kēia mau pono inā ho'oholo'oe e ho'onohonoho i ka pūnaehana ho'olālā. Ke hō'ike'ia i kahi mahana o 140 ° C, e ma'alahi ka mea, a nalowale kona'ano. 'Oiai inā pi'i ka mahana i kahi kaha o 170 ° C, a laila e hele mai ka pae ho'ohehe'e. I ka manawa like, e pau ana ka pa'apa'a a nalowale ka hiki ke mālama i kona'ano'ike a me kona'ano.

'A'ole e helu'ia nā'ōnaehana ho'olālā ma kēia'ano wela, no laila, ua kūpono nā paipu polypropylene i ka hā'awi'ana i ka wai i ka'ōnaehana. 'O ka mea ma'amau,'o nā mea hana hana e hō'ike e hiki ke ki'eki'e o ka mahana kūpono o nā polypropylene pipes i 95 ° C. Hiki i nā mea ke pale i kahi ki'eki'e wela ki'eki'e, akā no ka manawa pōkole. Inā ho'ohana'ia nā paipa no kahi lō'ihi i ka mahana o ka'oi aku o 100 ° C, e emi ana ke ola o kā lākou paipu.

Ke pi'i ka mahana, e loli ka polypropylene i ka nui. Ke ho'onā'ia, e ho'onui'ia, ai ka wā e malo'o ai, e kūlapa. Ma lalo o ka ho'onāukiuki'ana o nā mahana wela, hiki ke ho'omaka nā paipa e ho'ohui i waena o nā mea i ho'opa'a'ia, a ma ka papa waho e'ike'oe i kahi ho'oulu.

Nuances o ka ho'ohana'ana i nā paipu polypropylene

Hiki iā'oe ke ho'ohana i nā huahana i hana'ia no ka polypropylene. Hiki ke'oko'a ka mahana ho'ohehe'e o ia mau paipu. Pono e no'ono'o pono kēia inā loa'a iā'oe nā huahana PN20 i mua ou. I kēia manawa, ke kama'ilio nei mākou i kahi paipaona e hiki ai ke ki'eki'e o ka mahana i 60 ° C. Akā inā e kama'ilio ana mākou no ka huahana PN25, laila e hō'ike ana kēia e hiki iā ia ke pale i ke anawela a 95 ° C.

Ka Hopena

Me ka maopopo e hiki ke'ōlelo'ia ua ho'okomo'ia ka polypropylene e pili kokoke ana i nā huehi ahi. 'O ka pae ho'ohehe'e o polypropylene, akā,'a'ole ia e hō'ike i ka pono'ole o nā paipu. Kūpono nā kaukau i ka kū'ai'ana i nā huahana i ho'ohui hou'ia, kahi i emi'ole i ka ho'ololi'ana i ka'ike'ana i nā mahana wela. No laila, pono e pale pono'ia nā pēpili ma ka ho'onani'ana a loa'a i loko o ka pepa ulana i loko a me ka papa alumina. Mālama kēia i nā paipu mai ka ho'onui'ana a ho'onui i ko lākou ola.