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Viscoelastic properties of (cellulose oligo‐oxymethylene ether) acylates
Author(s) -
Morooka Toshiro,
Norimoto Misato,
Yamada Tadashi,
Shiraishi Nobuo
Publication year - 1982
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1982.070271130
Subject(s) - valerate , ether , cellulose , polymer chemistry , dynamic modulus , chemistry , materials science , organic chemistry , methylene , relaxation (psychology) , polymer , dynamic mechanical analysis , butyrate , psychology , social psychology , fermentation
Four kinds of (cellulose oligo‐oxymethylene ether) acylates from the acetate to the valerate were prepared by homogeneous reactions using a DMSO/PF cellulose solvent as the reaction medium. The temperature variations of dynamic modulus, loss modulus, and loss tangent for these polymers were measured. Three types of relaxation process were observed for all (cellulose oligo‐oxymethylene ether) acylates, and an additional relaxation process was detected for (cellulose oligo‐oxymethylene ether) butyrate and valerate. These processes were labelled α, β, γ, and δ in order of decreasing temperature at which they occurred. These α to δ processes were respectively attributed to: micro‐Brownian motion (α), motion of side chains (β), local mode motion involving oxymethylene groups (γ), and motion initiated by three or more methylene groups (δ).