title: Plasticization effect of triacetin on structure and properties of starch ester film.
abstract: The aim of this work was to evaluate the plasticizing effect of triacetin on the structure and properties of starch ester film and further establish the structure-property relationships. The presence of triacetin resulted in multiple structure changes of the film. The mobility of macromolecular chain was increased to form scattered crystallite during the film formation process. The amorphous region was enlarged to contain more triacetin squeezed from crystalline region. The plasticization of triacetin and restriction of crystallite oppositely influenced the mobility of macromolecular chains in different regions. The thermal stability of triacetin changed along with its fluctuant interaction with macromolecules. Comparatively, the enhanced ether bond and the restriction from crystalline regions on the mobility of the amorphous chain consequently improved the thermal stability of the film matrix. The interaction between triacetin and starch ester was essential to film forming but unexpectedly lowered the triacetin stability.
authors.affiliation: Ministry of Education Engineering Research Center of Starch & Protein Processing, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China. zhujie2009@163.com
authors.forename: Jie
authors.initials: J
authors.lastname: Zhu
authors.forename: Xiaoxi
authors.initials: X
authors.lastname: Li
authors.forename: Chen
authors.initials: C
authors.lastname: Huang
authors.forename: Ling
authors.initials: L
authors.lastname: Chen
authors.forename: Lin
authors.initials: L
authors.lastname: Li
mesh_terms: D003460:Crystallization; D055119:Elastic Modulus; D004952:Esters; D010968:Plasticizers / Q000737:chemistry*; D013213:Starch / Q000737:chemistry*; D013329:Structure-Activity Relationship; D013718:Tensile Strength; D014215:Triacetin / Q000737:chemistry*
chemical_list: D004952:Esters; D010968:Plasticizers; D013213:Starch; D014215:Triacetin