RRC ID 47851
著者 Shibakami M, Sohma M.
タイトル Synthesis and thermal properties of paramylon mixed esters and optical, mechanical, and crystal properties of their hot-pressed films.
ジャーナル Carbohydr Polym
Abstract Acylation of paramylon, a storage polysaccharide of Euglena gracilis, using multiple acid anhydrides yielded thermoplastic paramylon mixed esters without significant depolymerization. DSC examination showed that the shorter the acyl chain, the higher both the melting and glass transition temperature of the ester. TG analyses revealed their higher thermostability with the 5% weight loss temperature of ∼330°C. Melt volume flow rate examination revealed that the longer the acyl chain, the higher the thermoplasticity of the ester and that the esters exhibited higher thermoplasticity than structurally analogous esters made from cellulose and curdlan. A notable feature of the thermoplastic paramylon mixed esters is the availability of hot-pressing as a means of molding them into a film. Light transmittance and XRD measurements revealed that these films were transparent and in the amorphous state. Tensile tests indicated that the films had adequate mechanical strength comparable to those of the cellulose and curdlan analogues.
巻・号 155
ページ 416-424
公開日 2017-1-2
DOI 10.1016/j.carbpol.2016.08.093
PII S0144-8617(16)31044-X
PMID 27702530
IF 7.182
引用数 8
WOS 分野 CHEMISTRY, APPLIED CHEMISTRY, ORGANIC POLYMER SCIENCE
リソース情報
藻類 NIES-48