Controlled formation of isocyanate-terminated star polyethers avoiding chain extension

Autor:	C. F. Bartelink, Uwe Beginn, H. J. M. Grnbauer, M. Mller, M. De Pooter
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Polymers and Plastics Toluene diisocyanate Organic Chemistry Polymer Star (graph theory) Isocyanate Catalysis Chemical kinetics chemistry.chemical_compound chemistry Star polymer Yield (chemistry) Polymer chemistry Materials Chemistry Organic chemistry
Zdroj:	Journal of Polymer Science Part A: Polymer Chemistry. 38:2555-2565
ISSN:	1099-0518 0887-624X
DOI:	10.1002/1099-0518(20000715)38:14<2555::aid-pola60>3.0.co;2-z
Popis:	Star polymers with reactive isocyanate end groups were prepared via the end capping of hydroxy-terminated star polyether polyols with toluene diisocyanate (TDI; 80% = 2,4 TDI, 20% = 2,6 TDI). The multifunctional polyols and TDI were reacted in bulk without a catalyst. This procedure was optimal in regard to the product yield, minimizing unfavorable coupling side reactions and avoiding crosslinking reactions. The experimental results were based on theoretical studies of the reaction kinetics. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 2555–2565, 2000
Databáze:	OpenAIRE
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