Ester-amide exchange in blends of liquid-crystalline copolyester and polyamide 6

Authors
Ho, JC Wei, KH
Citation
Jc. Ho et Kh. Wei, Ester-amide exchange in blends of liquid-crystalline copolyester and polyamide 6, J POL SC PP, 38(16), 2000, pp. 2124-2135
Citations number
27
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
ISSN journal
08876266 → ACNP
Volume
38
Issue
16
Year of publication
2000
Pages
2124 - 2135
Database
ISI
SICI code
0887-6266(20000815)38:16<2124:EEIBOL>2.0.ZU;2-A
Abstract
The kinetics of the ester-amide exchange in solution blends of the random l iquid-crystalline polyester copoly(oxybenzoate-terephthalate) (P64) and pol yamide 6 (PA6) were studied with carbon nuclear magnetic resonance. With se cond-order reversible reactions assumed, the activation energy of the ester -amide interchange in 30/70, 50/50, and 70/30 P64/PA6 blends were all about 24.0 kcal/mol. The pre-exponential factors for the ester-amide exchange in 30/70, 50/50, and 70/30 P64/PA6 blends were 2.01 x 10(11), 2.59 x 10(10), and 2.74 x 10(12) min(-1), respectively. (C) 2000 John Wiley & Sons, Inc.