Physico‐chemical, thermal, and mechanical approaches for the characterization of solubilized and solid state chitosans. Issue 2 (2nd August 2014)

• Record Type: Journal Article
• Authors: Mati‐Baouche, Narimane; De Baynast, Hélène; Vial, Christophe; Audonnet, Fabrice; Sun, Shengnan; Petit, Emmanuel; Pennec, Fabienne; Prevot, Vanessa; Michaud, Philippe
• Is Part Of: Journal of applied polymer science. Volume 132:Issue 2(2015:Jan. 15)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2014-08-02
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.41257
• Languages: English
• ISSNs: 0021-8995

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>This study was conducted on the both solid and solubilized chitosans to propose an approach for the physico‐chemical, thermal and mechanical characterizations of this polysaccharide. The polysaccharide used was a 90% deacetylated chitosan having a molecular weight of 98.4 kDa. The flow property of chitosan solutions was evaluated revealing a shear‐thinning behavior. The thermal characterization was carried out by studying heat specific capacity, glass transition temperature, and thermal conductivity on chitosan dried specimens (solid state). Their <italic>T_g</italic> were measured by DSC and confirmed by DMA at 102 and 122°C depending on concentrations of initial chitosan solutions. The mechanical characterization was conducted by analyzing Young modulus, tensile strength, and elongation at break of chitosan specimens. They exhibited a higher elongation at break and a lower tensile strength when made from high concentrated chitosan solution (9% w/v). Differences in mechanical behavior of specimens were explained by differences of crystallinity. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <bold>2015</bold>, <italic>132</italic>, 41257.</p> </abstract>