𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis and characterization of thermoplastic polyesters and polyamides from sebacyl bisketene

✍ Scribed by Garner, David P.

Book ID
105334048
Publisher
John Wiley and Sons
Year
1982
Weight
523 KB
Volume
20
Category
Article
ISSN
0360-6376

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Sebacyl bisketene was generated in solution at −78°C. Copolymerization in solution at 0°C with the secondary diamines, piperazine and N,N′dimethyl‐1,6‐hexamethylenediamine, yielded the polyamides poly(1,4‐piperazylsebacyl) and poly[(methylimino)hexamethylene(methylimino)sebacyl], respectively. The polyamides were obtained in yields of 50–90%. The former had a glass transition temperature (T~g~) at 30°C and a melting temperature at 165°C, whereas the latter had only a T~g~ at −15°C. The polymers were insoluble in the usual polyamide solvents. Copolymerization with the diol bisphenol A yielded poly(oxy‐1,4‐phenyleneisopropylidene‐1,4‐phenyleneoxysebacyl). The polyester was obtained in yields up to 99%. Gel permeation chromatography (GPC) determinations showed molecular weights up to 50,000 when acetone was the reaction solvent but only 12,000 when tetrahydrofuran (THF) was the reaction solvent; the T~g~ for the polyester varied with the molecular weight with a maximum at 15°C. Tensile properties were obtained for the polyesters with molecular weights greater than 35,000.

📜 SIMILAR VOLUMES

The effect of temperature and solvent on
The effect of temperature and solvent on the synthesis and properties of nylon 610 made from sebacyl bisketene
✍ Garner, David P. ;Fasulo, Paula D. 📂 Article 📅 1985 🏛 John Wiley and Sons ⚖ 986 KB

## Abstract Polyamides were synthesized at −60°, −40°, −20°, and 0°C from sebacyl bisketene and 1,6‐hexamethylenediamine in either acetone or methylene chloride. At the lower reaction temperatures oligomers predominated in solution but at 0°C the product was crosslinked. The polyamides were subject

Synthesis and properties of polyamides a
Synthesis and properties of polyamides and polyesters from neocarboranedicarboxylic dichloride
✍ Korshak, V. V. ;Bekasova, N. I. ;Komarova, L. G. 📂 Article 📅 1970 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 345 KB

## Abstract Polyamides and polyesters based on neocarboranedicarboxylie dichloride and previously not described have been prepared by low‐temperature polycondensation in solution and characterized. In preparing the polyamides, the following diamines were used: benzidine, hexamethylenediamine, __m__

Z-protected glutamic acid-based biodegra
Z-protected glutamic acid-based biodegradable thermoplastic and thermosetting polyesters: Synthesis and characterization
✍ R. M. Tadros; H. Noureddini; D. C. Timm 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 195 KB 👁 1 views

Biodegradable polymers were formed from N-benzyloxycarbonyl-L-glutamic acid with the comonomers ethylene glycol, diglycidyl ether of 1,4-butanediol, and diglycidyl ether of bisphenol A. The three polymers were a linear and a crosslinked heterochain polyester and a crosslinked polyester that containe