𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Direct synthesis of carboxylated polyurethanes

✍ Scribed by W. Marconi; A. Martinelli; A. Piozzi; D. Zane

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
326 KB
Volume
27
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

✦ Synopsis

The first direct synthesis of a carboxylated polyurethane is described. The polyurethane, of the segmented type, was obtained by reaction of 4,4'-diphenylmethane diisocyanate with poly(propylene oxide) and the tributylammonium salt of dihydroxymethylpropionic acid. The polymer was characterized by viscometry, DSC, i.r. and NMR spectroscopy. The reactivity of the free carboxylic group in the polymer was evaluated for esterification and amidation.

πŸ“œ SIMILAR VOLUMES

Synthesis and properties of polyurethane
Synthesis and properties of polyurethane ionomers based on carboxylated polycaprolactone
✍ Hong Chen; Dongzhong Chen; Quli Fan; Xuehai Yu πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 173 KB πŸ‘ 2 views

Polycaprolactone containing carboxyl groups (CPCL, M n ϭ 1200) was prepared from caprolactone (CL) and dimethylol propionic acid (DMPA). Based on the CPCL, 4,4Ј-diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BD), a novel series of polyurethane ionomers could be synthesized with ions in the s

Synthesis of Novel Carboxylated Benzoxaz
Synthesis of Novel Carboxylated Benzoxazolylcoumarins.
✍ Ligia M. Rodrigues; X. H. Luan; Ana M. A. G. Oliveira; Ana M. F. Oliveira-Campos πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons βš– 109 KB

## Abstract For Abstract see ChemInform Abstract in Full Text.

Synthesis and characterization of carbox
Synthesis and characterization of carboxylated polysulfones
✍ Guiver, Michael D. ;Croteau, S. ;Hazlett, John D. ;Kutowy, O. πŸ“‚ Article πŸ“… 1990 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 829 KB

## Abstract Polysulfone has been carboxylated, via a metalated intermediate, by reaction of a THF solution of polymer with __n__‐butyllithium and then treatment with carbon dioxide. The polymer reactions with __n__‐butyllithium were close to quantitative and did not require the use of a tertiary am

Synthesis of hydroxylated segmented poly
Synthesis of hydroxylated segmented polyurethanes
✍ W. Marconi; P. Barontini; A. Martinelli; A. Piozzi πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 288 KB

The synthesis of a hydroxylated polyurethane, by reduction with diborane of the corresponding carboxylated polymer, is described. The starting polyurethane, of the segmented type, contains as chain extender dihydroxymethylpropionic acid. Various conditions for hydrogenation of the carboxy group have