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Hydroxytelechelic polybutadiene, 14. Gelation of a radically obtained hydroxytelechelic polybutadiene with 4,4′‐methylenedi(phenyl isocyanate)
Author(s) -
AllardBreton Bétrice,
Audenaert Marc,
Pham Quang Tho
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021970507
Subject(s) - polybutadiene , hydroxyl terminated polybutadiene , polymer chemistry , isocyanate , dispersity , telechelic polymer , materials science , swelling , chemistry , polymer science , polyurethane , composite material , copolymer , end group , polymer
A new commercial radically obtained hydroxytelechelic polybutadiene (HTPB‐A) was examined by 1 H NMR at 500 MHz, and a corrected interpretation of the complex proton methylene resonance of the vinyl‐type primary alcohol was done. The weight‐average hydroxyl functionality F̄ w (OH) was determined by using critical conversions at gel points of the (HTPB‐A + diisocyanate) systems, on the one hand, and swelling at equilibrium on the other. The functionality polydispersity index of HTPB‐A is close to unity.