Polyurethane elastomers e aofia i le poloka polymers, o lona uiga, o le polyurethane macromolecules e aofia ai "vaega vaivai" ma "vaega faigata" ma fausia ai se fausaga vavaega micro-phase, lea e taape ai vaega faigata (mai isocyanates ma filifili faʻalautele) i le vaivai. vaega vaega vaega itulagi (mai oligomer polyols) e faatino ai le matafaioi o itu faaletino koluse sootaga.O le mea lea, pe a faʻatusatusa i isi paʻu faʻapipiʻi (elastomers), e sili atu le malosi o le polyurethane elastomers ma le faʻaogaina o le teteʻe, E mafai lava ona tausia le maualuga maualuga pe a maualuga le maaa.
Elastic polyurethane meafaitino, e taʻua o le "CASE" i fafo, e masani ona aofia ai oloa polyurethane elastomer masani, paving mea e pei o polyurethane plastic runways, polyurethane coatings waterproofing, adhesives, sealants, potting adhesives, etc., accounting for about 40% of the total amount o oloa polyurethane.O le tele o oloa fa'amālōlōina o mea a le CASE (mea e fa'avae vai ma fa'asusu pe a uma ona aveese vai ma solvents) e le o ni foam elastic polyurethane material.PU synthetic pa'u resin, o nisi coatings ma adhesives o solvent-faavae po o vai-faavae oloa, lea e mafai foi ona manatu o ni mea polyurethane elastomer i se uiga lautele.I se uiga vaapiapi, polyurethane elastomers e faasino i castable polyurethane elastomers (CPU), thermoplastic polyurethane elastomers (TPU) ma polyurethane elastomers fefiloi (MPU), faʻamauina mo le 10% pe laʻititi laʻititi o le aofaʻi atoa o polyurethane.PPU ma TPU o le polyurethane elastomers autu, ma o latou eseesega o loʻo taoto i le gaosiga o le gaosiga ma le faʻalauteleina o filifili.O lenei ituaiga polyurethane elastomer masani, e lauiloa foi o le "polyurethane rubber", e patino i se ituaiga faapitoa o paʻu gaosia.O le maualuga o le polyurethane elastomer e sili ona lelei le ofuina o mea faʻapipiʻi i totonu o mea uma o le polymer synthetic, e taʻua o le "tupu o le ofuina o le teteʻe", ma o loʻo faʻaaogaina lautele i le tele o vaega, ma o loʻo faʻalauteleina pea talosaga fou.
Polyurethane elastomer e mafai ona faʻaaogaina e sui ai uʻamea, palasitika ma paʻu masani i nisi o fanua.
Pe a faʻatusatusa i mea uʻamea, polyurethane elastomer o loʻo i ai le lelei o le mamafa o le mamafa, maualalo le pisa, faʻafefeteina, taugofie le gaosiga ma le faʻamaʻiina o le acid.Pe a faʻatusatusa i palasitika, o loʻo i ai le lelei o le maualuga o le malosi ma le maualuga o le ofuina.Pe a faʻatusatusa i le paʻu masani, o le polyurethane elastomer o loʻo i ai le lelei o le ofuina o le teteʻe, tipi le teteʻe, loimata, maualuga le gafatia, osone tetee, ma isi, ma e faigofie ona gaosia, e mafai ona tuʻuina, sasaa, ma e iai le lautele o le maaa.
Taimi meli: Feb-14-2023