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Title: Synthesis of acyl chitin derivatives and miscibility characterization of their blends with poly(ε-caprolactone)
Authors: Sugimoto, Masao
Kawahara, Mariko
Teramoto, Yoshikuni  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-3850-3570 (unconfirmed)
Yoshiyuki Nishio  kyouindb  KAKEN_id
Author's alias: 寺本, 好邦
Keywords: acyl chitin
degree of substitution
poly(ε-caprolactone)
polymer blend
miscibility
Issue Date: 17-Mar-2010
Publisher: Elsevier
Journal title: Carbohydrate Polymers
Volume: 79
Issue: 4
Start page: 948
End page: 954
Abstract: Chitin derivatives having a normal acyl group (side-chain carbon number, N = 2–6) at different degrees of substitution (DS) were synthesized by a homogenous reaction of crab shell chitin with various acyl chlorides in N, N-dimethylacetamide-LiCl solution. NMR analysis quantitatively demonstrated the acylations not only for C3/C6 hydroxy protons but also for C2 amino proton(s). Solution cast blend films of the acyl chitin products with poly(ε-caprolactone) (PCL) were provided for the miscibility characterization by differential scanning calorimetry. The critical total-DS required for attaining a miscibility of the blending polymer pair decreased with an increase in N. The degree of miscibility was enhanced definitely with an increase in ester-DS, but it made less correlation with amide-DS. In analogy with cellulose ester/PCL blend systems, a structural affinity of the ester side-group of the chitinous component considered with a repeating unit of PCL may be a crucial factor for the miscibility attainment.
Rights: c 2009 Elsevier Ltd. All rights reserved.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/97920
DOI(Published Version): 10.1016/j.carbpol.2009.10.014
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