Investigation of the structure of aliphatic block-copolyamides by 13C NMR

Autor:	S. G. Alekseeva, M.I. Siling, E. G. Raevskaya, E. S. Artsis, Ya.G. Urman
Rok vydání:	1990
Předmět:	Condensation polymer Chain (algebraic topology) Chemistry Polyamide Polymer chemistry General Engineering Linear relation Melting point Carbon-13 NMR Block (periodic table)
Zdroj:	Polymer Science U.S.S.R.. 32:321-327
ISSN:	0032-3950
DOI:	10.1016/0032-3950(90)90023-y
Popis:	The composition and structure of aliphatic linear block-copolyamides, obtaiin by copolycondensation in the melt of oligoamides of ϵ-caprolactam and ω-dodecalacam with reactive terminal groups are studied by 13C NMR. It is shown that on synthesis of block-copolyamides, inter-chain exchange occurs as well as polycondensation of terminal groups, resulting in a decrease in length of the original blocks. A linear relation is established between the chain irregularity factor and melting points of the polyamides.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fa5988617e3fcbe8dbefa5ce6e40b450 https://doi.org/10.1016/0032-3950(90)90023-y Zobrazit plný text záznamu