Sui sooupu Nucleating
O le sui soʻosoʻo e talafeagai mo le maeʻa crystalline uga e pei o polyethylene ma polypropylene. E ala i le suia o le crystallization amioga o le resin, e mafai ona faʻatelevaveina le crystallization fua faatatau, faʻateleina le tioata density ma faʻalauteleina le miniaturization o le tioata saito tele, ina ia faapuʻupuʻu le taamilosaga taamilosaga ma faʻaleleia le manino ma luga Fou aoga mea faʻaopoopo mo tino ma masini meatotino pei o gloss, malosi malosi, maʻaʻa, vevela faʻavevesi vevela, aafiaga teteʻe atu, ma tolotolo teteʻe.
Faʻaopopoina se nucleating sooupu mafai faʻateleina le crystallization saosaoa ma tikeri o crystallization o le crystalline polymer oloa, e le gata mafai faʻateleina le gaioiga ma suia saosaoa, ae matua faʻaititia foi le tulaga o le lua crystallization o mea, faʻaleleia atili ai le dimensional tulaga mautu o le oloa .
Le aʻafiaga ole aufaʻatumu ile faʻatinoina o oloa
O le faʻaopopoina o le eletise faʻaola e faʻaleleia ai le maatotasi meatotino o le polymer mea, lea e aʻafia ai le faʻaletino ma gaosi meatotino o le polymer mea.
01 Aafiaga i luga o le malosi malosi ma punou malosi
Mo crystalline poʻo semi-crystalline polymers, o le faʻaopopoina o le nucleating agent e aoga e faʻateleina ai le crystallinity o le polymer, ma e masani ona i ai se faʻamalosiʻaga aoga, e faʻateleina ai le maʻaʻaʻa o le polymer, o le malosi faʻamalosi ma le punou o le malosi, ma le modulus , but The elongation at break masani lava ona faʻaititia.
02 Tetee atu i aafiaga malosi
I se tulaga lautele, o le maualuga o le vevesi poʻo le punou o le mea, o le aʻafiaga malosi ono mou atu. Ae ui i lea, o le faʻaopopoina o le nucleating sooupu o le a faʻaititia ai le spherulite tele o le polymer, ina ia faʻaali ai le polymer lelei lelei teteʻe atu. Mo se faʻataʻitaʻiga, o le faʻaopopoina o se sui soʻoga talafeagai i le PP poʻo le PA, e mafai ona faʻateleina ai le malosiaga o mea i le 10-30%.
03 Aʻafiaga i luga ole vaʻaiga
E masani ona manino polymers manino e pei ole PC poʻo le PMMA e le amorphous polymers, ae o le crystalline poʻo le semi-crystalline polymers e masani ona opaque. O le faʻaopopoina o mea e faʻaola ai meaola e mafai ona faʻaititia ai le tele o fatu o le polymer ma iai uiga o le microcrystalline fausaga. E mafai ona faia le oloa faʻaali atu uiga o le translucent pe atoa manino, ma i le taimi e tasi e mafai ona faʻaleleia le pito i luga maeʻa o le oloa.
04 Aʻafiaga i luga ole polymer teuteuina gaosiga gaioiga
I le polymer molding process, ona o le polymer melt e iai lona saoasaoa vave faʻamaluluina, ma o le polymer molekular chain e leʻi maeʻa maeʻa ona faʻamalamalamaina, e mafua ai le faʻaititia ma le fesuiaiga i le taimi o le faʻamaluluina o gaioiga, ma le le maeʻa maeʻa crystallized polymer e leaga le mautu tulaga. E faigofie foi ona solomuli le tele i le taimi o le gaioiga. Faʻaopopoina se nucleating sooupu mafai ona faʻatelevaveina le crystallization fua faatatau, faʻapuʻupuʻu le taimi suia, faʻaleleia le gaosiga lelei ma faʻaititia le tikeri o le maeʻaina o le oloa.
Ituaiga o nucleating sooupu
01 α tioata faʻatumuina sui sooupu
E mafuli faʻaleleia atili le transparency, luga gloss, maʻaʻa, vevela faʻaseseina vevela, ma isi o le oloa. E faʻaigoa foʻi o le sui malamalama, o le transmittance enhancer, ma le rigidizer. Faʻapitoa aofia ai dibenzyl sorbitol (dbs) ma ona faʻatupuina, masima fosimasi ester masima, sui benzoates, ma isi, aemaise lava dbs nucleating manino sui sooupu o le sili ona masani talosaga. E mafai ona vaevaeina le aufaʻatinoina o le Alpha crystal i le inorganic, organic ma macromolecules e tusa ma a latou fausaga.
02 Faʻavae
O vailaʻau e le faʻaopoopoina i totonu e masani lava ona aofia ai talc, calcium oxide, carbon black, calcium carbonate, mica, inorganic pigments, kaolin ma catalyst residues. Nei o le muamua taugofie ma aoga faʻatinoina soʻoga sooupu atiina ae, ma sili ona suesueina ma faaaogaina nucleating sooupu o talc, mica, ma isi.
03 Faʻatulagaina
Masima uamea o Carboxylic acid: e pei o le sodium succinate, sodium glutarate, sodium caproate, sodium 4-methylvalerate, adipic acid, alumini adipate, alumini tert-butyl benzoate (Al-PTB-BA), Alumini benzoate, potassium benzoate, lithium benzoate, sodium cinnamate, sodium β-naphthoate, ma isi. I totonu ia i latou, o le alkali metal poʻo le aluminium salt o le benzoic acid, ma le masima alumini o le tert-butyl benzoate e sili atu ona aoga ma e umi se taimi e faʻaaoga ai, ae o le manino e leaga.
Masima uʻamea o le phosphoric acid: O fualaʻau e masani ona aofia ai masima uʻamea phosphate ma faʻavae uʻamea phosphates ma o latou laʻasaga. E pei o 2,2'-methylene bis (4,6-tert-butylphenol) phosphine alumini masima (NA-21). O lenei ituaiga o soʻotaga mea e faʻaalia e ala i le manino lelei, maʻaʻa, vave tioata, ma isi, ae leaga le faʻasalalauina.
Sorbitol benzylidene afua mai i ai: E i ai se taua tele aafiaga i luga o le manino, luga gloss, maʻaʻa ma isi thermodynamic meatotino o le oloa, ma ei ai lelei fetaui ma PP. O se ituaiga o transparency lea o loʻo faʻagasolo nei suʻesuʻega loloto. Sui sooupu faanatinati. Faʻatasi ai ma le lelei faʻatinoga ma tau maualalo, ua avea ma sili ona malosi atiina ae nucleating sooupu ma le tele tele ituaiga ma le tele o gaosiga ma faʻatau i le fale ma fafo. E tele lava dibenzylidene sorbitol (DBS), lua (p-methylbenzylidene) sorbitol (P-M-DBS), lua (p-chloro-substitutes benzal) sorbitol (P-Cl-DBS) ma isi.
Maualuga melting point polymer nucleating agent: I le taimi nei, e tele lava i ai polyvinyl cyclohexane, polyethylene pentane, ethylene / acrylate copolymer, ma isi E i ai le lelei palu meatotino ma polyolefin resins ma lelei faʻasalalauina.
β tioata nucleating sooupu:
O le faʻamoemoe o le mauaina o oloa polypropylene ma maualuga β tioata foliga fomu. O le lelei o le faʻaleleia atili o le aafiaga teteʻe atu o le oloa, ae le faʻaititia pe faʻateleina foi le vevela deformation vevela o le oloa, ina ia avea le lua feteʻenaʻi itu o le teteʻeina o aʻafiaga ma le teteʻeina o le vevela o loʻo mafaufauina.
Tasi ituaiga o ni fusi mama fusia faʻatasi ma quasi-planar fausaga.
O leisi e aofia ai oxides, hydroxides ma masima o nisi dicarboxylic acid ma metala o le kulupu IIA o le taimi masani laulau. E mafai ona fesuiaʻi le fua faʻatatau o eseese tioata fomu i le polymer e faʻafesuiaʻi PP.
