Zvishandiso zvepolyurethane zvinoita basa guru mukugadzirwa kwefuro remasero akavhurika, chinhu chinoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana. Furo remasero akavhurika, rinozivikanwa nechimiro charo chemasero akabatana, rinobvumira mweya nemvura kuti zvipfuure nepakati, zvichiita kuti rikwanise kufema zvakanaka uye rive rakapfava. Chimiro ichi chakasiyana chinorisiyanisa nefuro remasero akavhurika, iro rine masero akaparadzana anopa chimiro chakasimba uye chakasimba.
Mashandisirwo eFoam Yakavhurika
Foam ine maseru akasiyana-siyana inoshandiswa mumabasa akasiyana-siyana nekuda kwehunhu hwayo hwakasiyana. Imwe yenzira dzayo huru ndeyekushanda muindasitiri yefenicha, uko inoshandiswa mukugadzira machira ekufukidzira nekuisa fenicha kuti inyaradze uye itsigire. Kupfava kwayo uye kuchinjika kunoita kuti ive yakakodzera matiresi, mapiro, uye zvigaro.
Muchikamu chemotokari, furo rakavhurika rinoshandiswa mukugadzirisa zvigaro uye mukudzivirira ruzha. Kugona kwefuro kupinza ruzha nekudengenyeka kunowedzera kugadzikana nerunyararo rwemakamuri emotokari. Pamusoro pezvo, hunhu hwaro hwakareruka hunobatsira mukushanda zvakanaka kwemotokari nekuderedza huremu pasina kukanganisa kugadzikana.
Imwe nzira yakakosha yekushandisa furo rakavhurika iri muindasitiri yekuvaka. Inoshandiswa sechishandiso chekudzivirira furo rinopfapfaidza chinobatsira kudzora tembiricha yemukati nekupa chinodzivirira kupisa. Kufema kwefuro kunobatsirawo kudzivirira hunyoro, nokudaro zvichideredza njodzi yekuumbwa kwevhu nefungus.
Furo rine maseru akavhurika rakajairikawo muindasitiri yekurongedza. Hunhu hwayo hwekushongedza hunodzivirira zvinhu zvisina kusimba panguva yekutumira nekubata. Uyezve, kugona kwayo kuenderana nechimiro chakasiyana kunoita kuti ive yakakodzera kune mhinduro dzekugadzirisa dzakagadzirirwa iwe.
Basa rePolyurethane Catalysts muOpen-Cell Foam Synthesis
Kugadzirwa kwefuro repolyurethane rakavhurika kunosanganisira maitiro akaomarara emakemikari, uko macatalyst epolyurethane akakosha. Macatalyst aya anokanganisa mwero wekuita uye hunhu hwekupedzisira hwefuro. Kune mhando mbiri huru dzemacatalyst anoshandiswa mukuita uku: macatalyst eamine uye macatalyst akavakirwa pasimbi.
Amine Catalysts: Izvi zvinoshandiswa zvakanyanya mukugadzira furo remasero akavhurika nekuda kwekugona kwadzo kudzora kuenzana pakati perea (polyol-isocyanate) uye urea (water-isocyanate). Mienzaniso yeamine catalysts inosanganisira triethylenediamine (TEDA), bis(dimethylaminoethyl)ether (BDMAEE), uye N,N-dimethylcyclohexylamine (DMCHA). Aya macatalysts anobatsira mukugadzira chimiro chemasero akavhurika nekuchinja kukwira kwefuro uye nguva yegel, zvichiita kuti masero agadzireke zvakaenzana uye zvakaenzana.
Zvishandiso Zvinoshandiswa Pakugadzira Metal: Organotin compounds imhando dzezvishandiso zvinoshandiswa pakugadzira polyurethane foam. Izvi zvinomhanyisa isocyanate-polyol reaction, zvichiwedzera hunhu hwemuchina uye kugadzikana kwefoam. Dibutyltin dilaurate (DBTDL) uye stannous octoate mienzaniso yezvinoshandisirwa organotin mukuita uku.
Mhedziso
Foam yepolyurethane yakavhurika, ine mashandisirwo ayo akawanda, inovimba zvakanyanya nemaitiro chaiwo uye anodzorwa anobatsira nemacatalysts epolyurethane. Nekunzwisisa basa remacatalysts aya, vagadziri vanogona kugadzirisa hunhu hwefoam kuti husvike pazvinodiwa zvekushandisa, vachivimbisa kushanda kwepamusoro uye kuvimbika mumaindasitiri akasiyana-siyana. Semupi wepolyurethane catalysts, takazvipira kupa zvinhu zvakakosha zvinodiwa kugadzira foam yemhando yepamusoro, tichitsigira hunyanzvi uye kugona mubasa iri rinochinja-chinja.
Nguva yekutumira: Chikumi-11-2024