Ebe mgbaze polypropylene: àgwà na ihe onwunwe

Polypropylene bụ polymer nke na-ekpo ọkụ. Nke a na-akwadebe dị ka technology nke polymerization nke propylene eji akpali nke metal. Iji nweta ihe a kwa yiri ndị na nke na-emepụta elu njupụta polyethylene.

Na-adabere na nke a na-eme mkpọtụ, ọ ga-ekwe omume nweta ụdị polymer ma ọ bụ ngwakọta ya. The agbaze n'ókè nke polypropylene - bụ otu n'ime ihe ndị dị mkpa e ji mara nke a ihe onwunwe. Ọ nwere ụdị ọcha ntụ ntụ ma ọ bụ nsogbu dị iche iche, nnukwu njupụta nke na-gbanwere 0, 5 g / cm³. Ihe a kọwara nwere ike ịcha acha, mechie ma ọ bụ na-adịghị ọcha.

Nkà na ụzụ: usoro ngwugwu

Dika onodi ogwu di iche iche, a na-ekewa polypropylene n'ime otutu ihe di iche, n'etiti ha:

• Isotactic;
• Atactic;
• Syndiotactic.

Stereoisomers nke ihe dị iche iche na ọdịdị anụ ahụ, nke ọrụ na nke kemịkal. Dịka ọmụmaatụ, polypropylene ngwa ngwa nwere ọdịdị nke ihe rubbery, nke a na-eji mmiri dị elu. The agbaze n'ókè nke polypropylene maka extrusion na nke a bụ banyere 80 ° C, mgbe njupụta nwere ike iru a larịị nke 850 kg / m³.

Na diethyl ether, ihe a na-akwusi nke ọma. Site na njirimara na-eme ka polypropylene dị iche na nke dị n'elu ma nwee nnukwu usoro nke elasticity, njupụta ya ruru 910 kg / m³, ebe okpomọkụ na-agbaze dịgasị iche site na 165 ruo 170 Celsius. Na ụdị dịgasị iche iche, a na-akọwa polypropylene site na nkwụsi ike na-eguzogide chemical reagents.

Njirimara anụ ahụ na ngwaọrụ

Taa, eji polypropylene eme ihe. Ihe na-agbaze nke ihe a dị iche na ụdị ụfọdụ. A na-ejikarị ya tụnyere polyethylene, ma polypropylene anaghị enwe oke dị elu, ọ bụ 0,91 g / cm³. Tụkwasị na nke ahụ, polypropylene dị ike, na-eguzogide ọgwụ na abrasion ma na-anabata nsogbu nke okpomọkụ.

Ọdịdị nke ịmalite ịmalite na-amalite na 140 Celsius C, mgbe ebe mgbaze ahụ ruru 175 Celsius. Enweghi ike igosi ihe na-adighi nma. Ọ na-eguzogide ọgwụ oxygen na ìhè, ma a na-ebelata uche a ma ọ bụrụ na agbakwunye ndị na-edozi ihe na ihe ndị dị na mmepụta nke polypropylene.

N'ọtụtụ ebe ụlọ ọrụ taa, a na-eji ọtụtụ ụdị polypropylene. Ebe mgbaze nke ihe a na-agbasawanye ngwa ngwa. Elongation dị na nkwụsịtụ na pasent nwere ike ịdị iche na 200 ruo 800%. Ekwenyere ike na erughị ala hà ịgba nke 250 na 350 kgf / cm². Mmetụta ike na notch àmà site 33 ruo 80 kgf · cm / cm², ebe Brinell ekweghị ekwe bụ n'etiti 6 na 6.5 kgf / mm².

Njirimara ihe eji eme ihe

Ọ bụrụ na ị na-eme atụmatụ ịzụta ngwaahịa ọ bụla si na polypropylene, ị ga-ama ọkwa ebe na-agbaze nke ihe a. A na-atụle ya na isiokwu ahụ. Site na ya ị nwere ike ịmụta na ngwaahịa ndị ọzọ. Dịka ọmụmaatụ, ihe ndị ahụ na-edozi nke ọma, na ihe ndị na-emepụta ihe na-eme ka ọ dị ntakịrị. Ọ bụrụ na ọnọdụ okpomọkụ na-adaba ruo 100 Celsius, mgbe ahụ, na aromatic hydrocarbons ihe onwunwe ga-agbari. N'okwu a, anyị na-ekwu maka atọene na benzene.

N'ihi na polypropylene nwere carbon carbon tertiary, ọ na-eguzogide ọgwụ na mmetụta nke ikuku oxygen mgbe kpughere radiation radiation na okpomọkụ dị elu. Nke a na-ebute ịka nká ma e jiri ya tụnyere polyethylene. N'okpuru nduzi nke mgbasa ozi ike nke polypropylene adịghị ike dịka polyethylene, gbawara. Ọ na-enwe ike ịnweta ule na-ama jijiji.

Mmiri na-ekpo ọkụ nke pipụ polypropylene

Ugboro ugboro, onye na-azụ ahịa n'oge a nwere mmasị na ebe mgbaze nke polypropylene. Ngwaọrụ a na-emetụta ma ọ bụrụ na ị na-eme atụmatụ ịhazi usoro kpo oku. Mgbe a na-ekpughe ya na okpomọkụ nke 140 ° C, ihe ahụ na-adị nro, ọ ga-efunahụ ya. Ọ bụrụ na okpomọkụ na-ebili na akara nke 170 ° C, mgbe ahụ, agbaze agba ga-abịa. N'otu oge ahụ, ọ ga-akwụsị ịdigide siri ike, ọ ga-atụfukwa ikike nke ịnọgide na-enwe njirimara na njirimara ya.

A naghị atụkọta usoro mkpuchi na ọkwa okpomọkụ a, ya mere, pipụ polypropylene dị mma maka inye mmiri na usoro. Dịka, ndị na-emepụta ihe na-ekwu na oke kachasị elu nke ikuku polypropylene bụ 95 ° C. Ngwaahịa nwere ike iguzogide ọkwa dị elu karị, ma ruo obere oge. Ọ bụrụ na a na-eji pipụ mee ogologo oge na okpomọkụ nke karịa 100 Celsius, ndụ nke pipụ ha ga-ebelata.

Mgbe okpomọkụ na-ada, polypropylene ga-agbanwe na nha. Mgbe iwe dị ọkụ, ọ ga-abawanye, ma mgbe mma, ọ ga-eme nkwekọrịta. N'okpuru mmetụta nke okpomọkụ, pipụ nwere ike ịmalite ịbanye n'etiti ihe mgbakwunye ahụ, na na akwa mpụga ị ga-ahụ ọkwa.

Nuances nke iji polypropylene ọkpọkọ

I nwekwara ike iji ngwaahịa nke polypropylene. Mmiri na-agbaze nke ụdị ọkpọkọ ahụ nwere ike dị iche. A ghaghị iburu nke a n'uche ma ọ bụrụ na ịnwe ngwaahịa PN20 n'ihu gị. N'okwu a, anyị na-ekwu banyere otu ọkpọkọ nke okpomọkụ nke ọrụ na-eru 60 Celsius. Mana ọ bụrụ na anyị na-ekwu maka ngwaahịa PN25, nke a na-egosi na ọ ga-enwe ike idigide okpomọkụ ruo 95 Celsius.

Mmechi

O doro anya na enwere ike ikwu na a na-etinye polypropylene na nso nnye anwụrụ. Otú ọ dị, ebe mgbaze nke polypropylene, adịghị egosi na a gaghị echekwa pipụ. Ndị ọkachamara na-atụ aro ịzụ ngwaahịa, bụ nke na-adighi adighi ike na nrụrụ mgbe a na-ekpughe ya na okpomọkụ. Ya mere, a ga - echekwa ọkpọ ndị ọzọ site na mkpuchi ma nwee fiberglass ma ọ bụ oyi akwa oyi. Nke a ga-egbochi pipụ si gbasaa ma gbasaa ndụ ha.