caa a22 4500 465788076 CHVBK 20180323112015.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF01032451 doi (NATIONALLICENCE)springer-10.1007/BF01032451 Comparative reactivities of hydroxylated polybutadienes with isocyanate in nitrobenzene [Elektronische Daten] [Fernanda Coutinho, Luis Cavalheiro] Summary: The rates of reactions between two hydroxylated polybutadienes (R-45M and H-110) and 1,6-hexamethylene diisocyanate (HDI) have been studied in nitrobenzene solution in the temperature range from 30 to 60°C. An analytical method was used to follow the kinetics of the reactions. The second-order rate constants were calculated and it was concluded that the reactivities of the two-NCO groups in HDI are identical. The rate of the R-45M/HDI reaction is slightly higher and its activation energy is lower than that of the H-110/HDI reaction. The R-45M/HDI reaction is slower in nitrobenzene solution than in chlorobenzene solution. Springer-Verlag, 1990 Coutinho Fernanda Instituto de Macromoléculas, Universidade Federal do Rio de Janeiro, PO Box 68525, 21945, Rio de Janeiro, RJ, Brazil aut Cavalheiro Luis Diretoria de Armamento e Comunicações da Marinha, Rio de Janeiro, RJ, Brazil aut Polymer Bulletin Springer-Verlag 23/3(1990-03-01), 341-346 0170-0839 23:3<341 1990 23 289 https://doi.org/10.1007/BF01032451 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01032451 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Coutinho Fernanda Instituto de Macromoléculas, Universidade Federal do Rio de Janeiro, PO Box 68525, 21945, Rio de Janeiro, RJ, Brazil aut NATIONALLICENCE 700 1- Cavalheiro Luis Diretoria de Armamento e Comunicações da Marinha, Rio de Janeiro, RJ, Brazil aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 23/3(1990-03-01), 341-346 0170-0839 23:3<341 1990 23 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer