Krafta un organosolva lignīnu reaģētspējas izpēte ar 4,4`-difenilmetāna diizocianātu un iegūto produktu raksturojums
| dc.contributor.advisor | Balcerbule, Zenta | en_US |
| dc.contributor.author | Krūmiņa, Lelde | en_US |
| dc.contributor.other | Latvijas Universitāte. Ķīmijas fakultāte | en_US |
| dc.date.accessioned | 2015-03-24T07:59:06Z | |
| dc.date.accessioned | 2025-07-21T03:48:21Z | |
| dc.date.available | 2015-03-24T07:59:06Z | |
| dc.date.issued | 2010 | en_US |
| dc.description.abstract | Šajā darbā ir pētīti divu komerciālo lignīnu (krafta lignīns – Lignoboast, Zviedrija un organosolva lignīns – Alcell, Kanāda) reaģētspēja ar 4,4'–difenilmetāna diizocianātu (MDI) sausā dioksāna vidē. Kā katalizators izmantots alvas organiskais savienojums – alvas dibutildilaurāts. Reakcija noritēja argona atmosfērā 25°C temperatūrā, -NCO grupu saturs reakcijas maisījumā ~0,3 mol/L un NCO/OH attiecība bija 1:1. Iegūtos produktus raksturo ar elementanalīzi, FTIS spektriem, analītisko pirolīzi, termogravimetriju, diferenciālo skenēšanas kalorimetriju. | en_US |
| dc.description.abstract | In this work the reactivity of two types of commercial lignins (kraft lignin – Lignoboast, Sweden and organosolv lignin – Alcell, Canada), with 4,4'-diphenyl methane diisocyanate (MDI) in the pure dioxane media were investigated. Dibytil tin dilayrate was used as catalyst. The reaction was proceeded in argon atmosphere at 25 oC temperature , -NCO group content in mixture of rection was ~0,3 mol/l and NCO/OH ratio equal 1:1. Obtained products were characterized by using element analysis, FTIR spectrum, analytical pyrolysis, thermogravimetry, differential scanning calorimetry methods. | en_US |
| dc.identifier.other | 14936 | en_US |
| dc.identifier.uri | https://dspace.lu.lv/handle/7/20840 | |
| dc.language.iso | N/A | en_US |
| dc.publisher | Latvijas Universitāte | en_US |
| dc.rights | info:eu-repo/semantics/openAccess | en_US |
| dc.subject | Ķīmija | en_US |
| dc.title | Krafta un organosolva lignīnu reaģētspējas izpēte ar 4,4`-difenilmetāna diizocianātu un iegūto produktu raksturojums | en_US |
| dc.title.alternative | Study of the reactivity of kraft and organosolv lignins with 4,4`-diphenylmethane diisocyanate and characterization of obtained products | en_US |
| dc.type | info:eu-repo/semantics/bachelorThesis | en_US |