Ụlọ ọrụ ụgbọ ala na-ejipolyurethane na-agbanwe agbanwemaka oche ụgbọ ala na polyurethane siri ike maka
thermal na ụda mkpuchi.Enweghị ajụjụ, njirimara kachasị mkpa maka polyurethane
n'ime ụgbọ ala bụ obere arọ jikọtara ya na ike n'ibu ike.Atụmatụ ndị a na-emeziwanye ihe
ikike, ọnụ ahịa mmanụ ụgbọala, na nchekwa megide nkukota (18, 19).A na-ejikwa polyurethane na mkpuchi ụgbọ ala.mkpuchi mkpuchi dị mkpa maka ụgbọ ala, ebe ha na-enye mgbochi corrosion na ọla ndị a na-eji na akụkụ ahụ.Ha na-enyekwa mmetụta na-egbuke egbuke iji mee ụgbọ ala na-eguzogide ihu igwe, na-adịgide adịgide ma maa mma.Ụlọ ọrụ ụgbọ ala na arịa ụlọ na-eji ihe mgbochi ọkụ na mkpuchi ha maka nchekwa agbakwunyere.Otu ọrụ nyochara ọnụnọ nke ire ọkụ na mmetụta ha nwere n'ájá ụgbọ ala (20).A na-eji 2,2-bis (chloromethyl) -propane-1,3-diyltetrakis (2-chloroethyl) bisphosphate, nke a maara dị ka V6, dị ka ọkụ na-ere ọkụ na ụfụfụ ụgbọ ala, nke nwere tris (2-chloroethyl) phosphate dị ka carcinogen mara amara. ngwakọta (Foto 12).A na-ahụ ntinye uche na 5-6160 ng / g nke V6 n'ime uzuzu ụgbọ ala, nke dị elu karịa n'ájá ụlọ.Ọ bụ ezie na ọkụ dabeere halogen 14 Gupta na Kahol;Polyurethane Chemistry: Polyols ọhụrụ na Isocyanates ACS Symposium Series;American Chemical Society: Washington, DC, 2021. retardants dị irè n'imenyụ ọkụ, nsi ha site na ntọhapụ nke carcinogenic gas bụ a
nnukwu ndọghachi azụ.A na-etinye nyocha nke ọma n'ịmepụta ihe ọhụrụ ndị na-eme ka ọkụ na-ere ọkụ na-arụ ọrụ nke ọma na-enweghị ọkwa nke nsi nke ọkụ ọkụ na-adabere na halogen gosipụtara.Ihe ka ọtụtụ n'ime ihe ndị e ji mee ihe dị ka ọkụ ọkụ na-acha akwụkwọ ndụ akwụkwọ ndụ dabeere na metal oxides (21), nitrogen (22), phosphorus (23), na carbon (24).Aluminom trihydroxide, melamine, melamine cyanurate, melamine phosphate, ammonium phosphate, red phosphorus, phosphate esters, phosphinates, phosphonates, carbon black, na expandable graphite bụ ihe atụ ole na ole nke retardants nwere ike ime na enyi na enyi.O doro anya nke ukwuu na mmepe na ọmụmụ nke ndị na-ere ọkụ ọkụ-nke na-eweta ndakọrịta kwesịrị ekwesị na polyurethane na adịghị emepụta anwụrụ ọkụ na-egbu egbu n'oge usoro combustion - dị oke mkpa.

Nkwupụta: E hotara akụkọ ahụ site na Okwu Mmalite nke Polyurethane Chemistry Felipe M. de Souza, 1 Pawan K. Kahol, 2 na Ram K.Gupta *,1 .Naanị maka nkwurịta okwu na mmụta, emela ebumnuche azụmahịa ndị ọzọ, anaghị anọchite anya echiche na echiche nke ụlọ ọrụ ahụ, ọ bụrụ na ịchọrọ ibipụtaghachi, biko kpọtụrụ onye edemede mbụ, ma ọ bụrụ na e nwere mmebi iwu, biko kpọtụrụ anyị ozugbo iji wepụ nhazi.