Munyika yekugadzira furo repolyurethane, macatalysts anoita basa rakakosha pakuona hunhu uye mhando yechigadzirwa chekupedzisira. Imwe catalyst yakadaro iBDMAEE (Bis(dimethylaminoethyl) ether), amine inoshanda zvikuru inozivikanwa nemhedzisiro yayo huru pakuita kwefuro mumasisitimu epolyurethane. Chinyorwa chino chichaongorora mashandiro eamine catalysts, kunyanya paBDMAEE, uye kutsanangura kuti macatalysts aya anokanganisa sei kugadzirwa kwefuro repolyurethane rinochinjika.
Maitiro Ekuita kweZvinokonzera Aminemukugadzirwa kwePolyurethane
Kugadzirwa kwefuro repolyurethane kunoenderana nekuita kwemakemikari pakati peisocyanates nepolyols. Kuita uku kunogona kukamurwa kuita maitiro maviri makuru: kuita kwe "foaming" uye kuita kwe "gelation". Kuita kwefuro kunoitika pakati peisocyanates nemvura, zvichikonzera kugadzirwa kwecarbon dioxide, iyo inogadzira chimiro chemasero efuro. Kuita kwegelation, kune rumwe rutivi, kunosanganisira kuita pakati peisocyanates nepolyols, zvichitungamira pakuumbwa kwe polymer network iyo inopa furo chimiro chayo.
MaAmine catalysts akaita seBDMAEE anonyanya kushandiswa kukurumidzisa furo rinobuda. Anoshanda nekuwedzera mwero unobatwa nemaisocyanates nemvura, zvichiita kuti carbon dioxide ibude nekukurumidza. Kukurumidza uku kwakakosha pakuona kuti furo rinogadzira chimiro chemasero chinodiwa risati rasvika network yepolymer, iyo yaizobata gasi uye ikakanganisa kunaka kwefuro.
BDMAEE: Chinhu Chinokosha Chinosimudzira Mafuro ePolyurethane Anochinjika
BDMAEE inonyanya kukosheswa mukugadzira mafoam anochinjika epolyurethane, ayo anoshandiswa zvakanyanya mukushandiswa kubva kufenicha nezvigaro zvemotokari kusvika kukudzivirira kupisa nekurongedza. Simba rayo guru rekugadzirisa furo rinoita kuti ive sarudzo inofarirwa munyaya iyi. Kushanda kwakanyanya kweBDMAEE kunoita kuti furo riwane kukura kwakakodzera uye chimiro chakafanana chemasero, izvo zvakakosha pakushanda kwemafoam anochinjika.
Zvisinei, simba guru reBDMAEE rinofanira kuenzaniswa zvakanaka kudzivirira kukurumidza kwakanyanya, izvo zvinogona kukonzera zvikanganiso mufuro, zvakaita semagadzirirwo makuru emasero kana asina kurongeka. Kuenzana uku kunowanzo kuwanikwa nekubatanidza BDMAEE nezvimwe zvinowedzera kana kugadzirisa fomura kuti igadzirise reaction rate uye kuwana hunhu hwefuro hwaunoda.
Muchidimbu, BDMAEE inyanzvi yakakura uye inoshandakataviridziyekugadzirwa kwemafuro epolyurethane anochinjika. Basa rayo mukukurumidzisa kuumbwa kwefuro rinokosha pakugadzira zvigadzirwa zvefuro zvemhando yepamusoro uye zvinoenderana. Kunzwisisa mashandiro aro kunobvumira vagadziri kugadzirisa maitiro avo uye kuwana mhedzisiro yakanaka mukugadzirwa kwefuro repolyurethane.
Nguva yekutumira: Nyamavhuvhu-12-2024