Nyukireya mumiririri

Iyo nucleating mumiririri inokodzera isina kukwana makristasi epurasitiki senge polyethylene uye polypropylene. Nekuchinja iko crystallization maitiro eiyo resini, inogona kumhanyisa chiyero chekristalllization, kuwedzera kristaro kuwanda uye kukurudzira miniaturization yekristaro yezviyo saizi, kuti ipfupise kuumba kutenderera uye kugadzirisa kujekesa uye pamusoro Nyowani zvinoshanda zvinowedzerwa zvemuviri uye zvemagetsi. zvivakwa zvakaita sekubwinya, kusimba kwesimba, kuomarara, kupisa kwekukanganisa kwekupisa, kusagadzikana kwekukanganisa, uye kuramba kwekufamba.

Kuwedzera nucleating mumiririri kunogona kuwedzera crystallization kumhanya uye mwero crystallization pamusoro crystalline polymer chigadzirwa, kwete chete anogona kuwedzera kugadzira uye Kuumbwa kumhanya, asiwo kuderedza zvikuru chinoshamisa yechipiri crystallization acho, nokudaro kunatsiridza ndeiya yakaita kugadzikana chigadzirwa .

Iko kukanganisa kweiyo nucleating mumiriri pane chigadzirwa kuita

Iko kuwedzerwa kweiyo nucleating mumiririri kunovandudza iyo crystalline zvivakwa zveiyo polymer zvinhu, iyo inokanganisa iyo yepanyama uye kugadzirisa zvivakwa zveiyo polymer zvinhu.

01 Kufurira pane tensile simba uye kukotama simba

Yekristalline kana semi-crystalline polymers, kuwedzerwa kweiyo nucleating mumiririri kunobatsira kuwedzera kubwinya kwepolymer, uye kazhinji kune simba rekusimbisa, iro rinowedzera kuomarara kwepolymer, iyo yakasimba simba uye iyo inokombama simba, uye modulus , asi Kureba panguva yekuzorora kazhinji kunodzikira.

02 Kuramba kukanganisa simba

Kazhinji kutaura, iyo yakasimba iyo yakasimba kana kukotama kwesimba kwechinhu, iro simba rekukanganisa rinoda kurasikirwa. Nekudaro, kuwedzerwa kweiyo nucleating mumiririri kuchaderedza iyo spherulite saizi yeiyo polymer, kuitira kuti iyo polymer iratidze yakanaka yekukanganisa kuramba. Semuenzaniso, kuwedzera yakakodzera nucleating mumiririri kuPP kana PA mbishi zvigadzirwa zvinogona kuwedzera simba rekukanganisa kwechinhu ne10-30%.

03 Kufuridzira pane optical performance

Tsika dzakajeka dzakajeka dzakadai sePC kana PMMA kazhinji amorphous mapolymers, nepo crystalline kana semi-crystalline ma polima kazhinji ari opaque. Kuwedzeredzwa kwema nucleating agents kunogona kudzora saizi yeiyo polima zviyo uye kuve nehunhu hweiyo microcrystalline chimiro. Inogona kuita kuti chigadzirwa chiratidze hunhu hwe translucent kana hwakanyatsojeka, uye panguva imwechete inogona kuvandudza kumeso kupera kwechigadzirwa.

04 Simba pane polymer kuumbwa kwekugadzirisa mashandiro

Mune iyo polymer kuumbwa maitiro, nekuti iyo polymer inonyungudika ine inokurumidza kutonhora chiyero, uye iyo polymer mamorekuru cheni haina kunyatso kubwinyiswa, inokonzeresa kudzikira uye deformation panguva yekutonhora maitiro, uye isina kukwana yakajekeswa polymer ine hurombo hwenzvimbo kugadzikana. Izvo zvakare zvakareruka kudzikira muhukuru panguva yekuita. Kuwedzera iyo nucleating mumiriri kunogona kumhanyisa iyo crystallization chiyero, kupfupisa nguva yekuumba, kunatsiridza kugadzirwa kwekuita uye kudzikisa degree rekuposita-kudzvinyirira kwechigadzirwa.

Mhando dzeiyo nucleating mumiriri

01 α kristall nucleating mumiriri

 Inonyanya kugadzirisa kujekesa, kubwinya kwepasi, kuomarara, kupisa kwekukanganisa kupisa, nezvimwe zvechigadzirwa. Iyo inonzi zvakare yakajeka mumiririri, yekufambisa inosimudzira, uye rigidizer. Kunyanya inosanganisira dibenzyl sorbitol (dbs) uye zvigadzirwa zvayo, zvinonhuwira phosphate ester munyu, zvinotsiviwa benzoates, nezvimwe, kunyanya dbs nucleating yakajeka mumiririri ndiyo inonyanya kushandiswa. Alpha kristal nucleating agents anogona kuganhurwa kuita inorganic, organic uye macromolecule zvinoenderana nemamiriro avo.

02 Inorganic

Inorganic nucleating agents anonyanya kusanganisira talc, calcium oxide, kabhoni nhema, calcium carbonate, mica, inorganic pigments, kaolin uye zvinokonzeresa zvakasara. Aya ndiwo ekutanga asingadhuri uye anoshanda maanomatiki akaumbiridzwa, uye akanyanya kutsvakirwa uye akaisirwa vamiririri venyanzvi ndeye talc, mica, nezvimwe.

03 Zvisikwa

Carboxylic acid simbi munyu: sodiamu succinate, sodium glutarate, sodium caproate, sodium 4-methylvalerate, adipic acid, aluminium adipate, aluminium tert-butyl benzoate (Al-PTB-BA), Aluminium benzoate, potassium benzoate, lithiamu benzoate, sodium cinnamate, sodium β-naphthoate, nezvimwewo Pakati pavo, iyo alkali simbi kana aluminium munyu we benzoic acid, uye iyo aluminium munyu we tert-butyl benzoate ine mhedzisiro uye ine nhoroondo refu yekushandisa, asi kujekesa kwakashata.

Phosphoric acid simbi munyu: Organic phosphates inonyanya kusanganisira phosphate simbi munyu uye yakakosha simbi phosphates uye avo akaomarara. Zvakadai se2,2'-methylene bis (4,6-tert-butylphenol) phosphine aluminium munyu (NA-21). Rudzi urwu rweiyo nucleating mumiririri runoratidzwa nekujeka kujekesa, kuomarara, crystallization kumhanya, nezvimwewo, asi kushomeka kusaoneka.

Sorbitol benzylidene derivative: Iyo ine yakakosha yekuvandudza mhedzisiro pakujeka, kubwinya kwepasi, kuomarara uye zvimwe zvinhu zve thermodynamic zvechigadzirwa, uye inoenderana zvakanaka nePP. Icho chimiro chekujekesa icho chiri kuitika mukudzika kwakadzama. Nyukireya mumiririri. Nemaitiro akanaka uye nemutengo wakaderera, yazova inonyanya kushandisika nucleating mumiririri nemhando dzakasiyana siyana uye kugadzirwa kukuru nekutengesa kumba nekunze. Iko kune kunyanya dibenzylidene sorbitol (DBS), maviri (p-methylbenzylidene) sorbitol (P-M-DBS), maviri (p-chloro-akatsiva benzal) sorbitol (P-Cl-DBS) zvichingodaro.

Nzvimbo yakanyunguduka yakanyunguduka polymer nucleating mumiriri: Parizvino, pane kunyanya polyvinyl cyclohexane, polyethylene pentane, ethylene / acrylate copolymer, nezvimwewo. Ine zvimiro zvakashata zvinosanganisa zvine polyolefin resini uye yakanaka kupararira

β sekristaro nucleating mumiriri:

Chinangwa ndechekutora polypropylene zvigadzirwa zvine yakakwira β kristaro fomu zvemukati. Mukana uyu kugadzirisa kusagadzikana kwechigadzirwa, asi hakuderedze kana kutowedzera tembiricha yekushanduka kwechigadzirwa, kuitira kuti iwo maviri anopesana ezvekushomeka kwekushomeka uye kupisa kwekushomeka kwemhepo kunofungidzirwa.

Imwe mhando ndeye mashoma akasanganiswa mhete inosanganiswa nequasi-planar chimiro.

Imwe yacho inoumbwa neakisijeni, hydroxide uye munyu weimwe dicarboxylic acids uye simbi dzeboka IIA petafura ye periodic. Iyo inogona kugadzirisa chiyero chemakristani akasiyana mafomu mu polymer kugadzirisa PP.