Structural Peculiarities of Triblock Copolymers Containing Poly(Ethylene Oxide) and Polyacrylamide

Autor:	Tatyana Zheltonozhskaya, Sergey Fedorchuk, Yuriy Gomza, V.V. Klepko, S. D. Nessin, N. M. Permyakova
Rok vydání:	2008
Předmět:	Morphology (linguistics) Materials science Ethylene oxide Hydrogen bond Polyacrylamide Oxide General Chemistry Condensed Matter Physics Amorphous solid chemistry.chemical_compound Crystallography Crystallinity chemistry Polymer chemistry Copolymer General Materials Science
Zdroj:	Molecular Crystals and Liquid Crystals. 497:268/[600]-281/[613]
ISSN:	1563-5287 1542-1406
DOI:	10.1080/15421400802463092
Popis:	The morphology of the triblock copolymers (TBC) containing chemically complementary poly(ethylene oxide) (M vPEO = 3 · 103 ÷ 1 · 105) and polyacrylamide (M PAAm = 4.5 · 104 ÷ 9.07 · 105) of different chain lengths is studied. The loss of the PEO ability to crystallize in TBC at M vPEO ≤ 4 · 104 is established. At the same time, PEO blocks with M v = 1 · 105 form small crystalline domains in the TBC structure, but their crystallinity degree turns out to be by 2.8 times less than that in individual poly(ethylene oxide). A microphase separation in amorphous regions of the TBC structure at high values of M PAAm is revealed. It is shown that the main reason for the effects observed is the formation of a complex between PEO and PAAm blocks by hydrogen bonds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d1b89541102f1815ddda6d340e357df3 https://doi.org/10.1080/15421400802463092 Zobrazit plný text záznamu