Moemeli oa nyutlelie

Moemeli oa nucleating o loketse li-plastiki tsa kristale tse sa phethoang joalo ka polyethylene le polypropylene. Ka ho fetola boitšoaro ba crystallization ea lehoakhoa, e ka potlakisa sekhahla sa kristallishene, ea eketsa letsoalo la kristale le ho khothaletsa miniaturization ea boholo ba koro ea kristale, e le ho khutsufatsa potoloho ea ho bōpa le ho ntlafatsa ponaletso le bokaholimo ba lisebelisoa tse ncha tsa ts'ebetso ea 'mele le mochini. thepa e joalo ka sephatsimisi, matla a tensile, ho ba thata, mocheso o sothehileng mocheso, ho hanyetsa tšusumetso le ho hanela ho kenella.

Phaella ka ho re moemeli nucleating ka eketsa lebelo crystallization le tekanyo ea crystallization tsa sehlahisoa bonaletsang polymer sehlahisoa, eseng feela ka eketsa sebetsa le bōpa lebelo, empa hape haholo fokotsa ketsahalo ea crystallization mahareng tsa lintho tse bonahalang tse, ka tsela eo ho ntlafatsa tlhakore botsitso basehlahisoa .

Tšusumetso ea moemeli oa nucleating ts'ebetsong ea sehlahisoa

Ho eketsoa ha moemeli oa nucleating ho ntlafatsa litšobotsi tsa kristale ea thepa ea polima, e amang thepa ea 'mele le ts'ebetso ea thepa ea polima.

Tšusumetso ea matla a matla le ho koala

Bakeng sa lipolisi tse nang le kristale kapa seka-crystalline, ho eketsoa ha moemeli oa nucleating ho molemo ho eketsa khanya ea polima, 'me hangata ho ba le phello e matlafatsang, e eketsang ho tia ha polima, matla a tensile le matla a kobehang, le modulus , empa bolelele nakong ea khefu ka kakaretso boa fokotseha.

Ho hanyetsa matla

Ka kakaretso, ho phahamisa matla kapa ho khumama ha thepa, matla a tšusumetso a atisa ho lahleha. Leha ho le joalo, tlatsetso ea moemeli oa nucleating e tla fokotsa boholo ba polima ea polima, e le hore polima e bonts'a ts'ireletso e ntle. Mohlala, ho eketsa moemeli ea loketseng oa li-nucleating ho thepa ea PP kapa PA ho ka eketsa matla a ts'ebeliso ea thepa ka 10-30%.

Tšusumetso ea ts'ebetso ea optical

Li-polymeri tsa setso tse bonaletsang joalo ka li-PC kapa PMMA hangata ke li-polymer tse amorphous, ha li-polymeri tsa kristale kapa tsa semi-crystalline hangata li sa bonahale. Ho eketsoa ha li-nucleating agents ho ka fokotsa boholo ba lithollo tsa polymer mme ho ba le litšobotsi tsa sebopeho sa microcrystalline. E ka etsa hore sehlahisoa se bontše litšobotsi tsa translucent kapa tse bonaletsang ka ho felletseng, 'me ka nako e ts'oanang se ka ntlafatsa bokaholimo basehlahisoa.

Tšusumetso ho ts'ebetso ea ts'ebetso ea polasetiki

Ka tshebetso polymer bōpa, hobane qhibiliha polymer na le sekhahla ka lebelo tsidifatso, le polymer ketane limolek'hule e sa ka ho feletseng crystallized, e etsa hore shrinkage le deformation nakong tshebetso tsidifatso, le polymer crystallized crystallized na le futsanehile tlhakore botsitso. Ho bonolo hape ho fokotseha ka boholo nakong ea tšebetso. Ho eketsa moemeli oa nucleating ho ka potlakisa sekhahla sa crystallization, ho khutsufatsa nako ea ho betla, ho ntlafatsa ts'ebetso ea tlhahiso le ho fokotsa sekhahla sa ho emisa sehlahisoa kamora sehlahisoa.

Mefuta ea moemeli oa nucleating

01 α kristale ea nucleating agent

 Haholo-holo e ntlafatsa ponaletso, bokaholimo ba bokaholimo, ho tenyetseha, mocheso o sothehileng mocheso, jj. E boetse e bitsoa moemeli ea pepeneneng, sehokelo sa phetisetso, le rigidizer. Haholo-holo e kenyelletsa dibenzyl sorbitol (dbs) le lihlahisoa tsa eona, monko o monate oa phosphate ester, li-benzoate tse nkeloang sebaka, jj. Mefuta ea alpha e hlahisang li-crystal e ka aroloa ka likaroloana tse sa tsoaneng le tse entsoeng ka manyolo ho latela sebopeho sa eona.

02 E sa tloaelehang

Likokoana-hloko tse sa sebetsanang le li-nucleating haholoholo li kenyelletsa talc, calcium oxide, carbon black, calcium carbonate, mica, pigment e sa tloaelehang, kaolin le masala a sethothetsi. Tsena ke li-nucleating tsa pele tse theko e tlaase le tse sebetsang tse ntlafalitsoeng, mme lihlahlobo tsa nucleating tse batlisisitsoeng le ho sebelisoa haholo ke talc, mica, jj.

03 Ea tlhaho

Letsoai la tšepe ea Carboxylic acid: joalo ka sodium succinate, sodium glutarate, sodium caproate, sodium 4-methylvalerate, adipic acid, aluminium adipate, aluminium tert-butyl benzoate (Al-PTB-BA), Aluminium benzoate, potassium benzoate, lithium benzoate, sodium sinamate, sodium β-naphthoate, jj. Har'a tsona, tšepe ea alkali kapa letsoai la aluminium ea benzoic acid, le letsoai la aluminium la tert-butyl benzoate li na le litlamorao tse ntle ebile li na le nalane e telele ea ts'ebeliso, empa ponaletso e mpe.

Letsoai la tšepe ea phosphoric acid: Li-phosphate tsa manyolo haholo li kenyelletsa matsoai a tšepe ea phosphate le li-phosphates tsa tšepe tsa mantlha le meaho ea tsona. Joalo ka 2,2'-methylene bis (4,6-tert-butylphenol) phosphine aluminium letsoai (NA-21). Mofuta ona oa moemeli oa nucleating o khetholloa ka ponaletso e ntle, ho tiya, lebelo la kristallishene, jj.

Sesebelisoa sa Sorbitol benzylidene: E na le phello e kholo ntlafatsong ea ponaletso, bokaholimo ba bokaholimo, ho tiya le thepa e 'ngoe ea sehlahisoa, mme e sebelisana hantle le PP. Ke mofuta oa ponaletso o seng o ntse o etsoa lipatlisiso tse tebileng. Moemeli oa nyutlelie. Ka ts'ebetso e ntle le theko e tlase, e se e le moemeli oa nucleating ea ntlafalitsoeng ka ho fetesisa ka mefuta e meholohali le tlhahiso le thekiso e kholo ho fetisisa lapeng le kantle ho naha. Haholo-holo ho na le dibenzylidene sorbitol (DBS), tse peli (p-methylbenzylidene) sorbitol (P-M-DBS), tse peli (p-chloro-substituted benzal) sorbitol (P-Cl-DBS) joalo-joalo.

Sebaka se phahameng se qhibilihisang polymer nucleating agent: Hajoale, ho na le polyvinyl cyclohexane, polyethylene pentane, ethylene / acrylate copolymer, jj. E na le litšobotsi tse mpe tsa ho kopanya le li-resin tsa polyolefin le ho senyeha habonolo.

agent kristale nucleating moemeli:

Morero ke ho fumana lihlahisoa tsa polypropylene tse nang le mofuta o phahameng oa kristale. Monyetla ke ho ntlafatsa tšitiso ea sehlahisoa, empa ha e fokotse kapa hona ho eketsa mocheso oa mocheso oa sehlahisoa, e le hore likarolo tse peli tse hanyetsanang tsa ho hanyetsa tšusumetso le ho hanyetsa mocheso li kenngoe hloko.

Mofuta o mong ke mechini e 'maloa e kopantsoeng ea reng.

E 'ngoe e entsoe ka li-oxide, li-hydroxide le matsoai a li-dicarboxylic acid le lirafshoa tsa sehlopha sa IIA sa tafoleng ea nako le nako. E ka fetola karolelano ea mefuta e fapaneng ea kristale ho polymer ho fetola PP.