✦ LIBER ✦
Hydroxytelechelic polybutadiene, 14. Gelation of a radically obtained hydroxytelechelic polybutadiene with 4,4′-methylenedi(phenyl isocyanate)
✍ Scribed by Bétrice Allard-Breton; Marc Audenaert; Quang Tho Pham
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 402 KB
- Volume
- 197
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
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.