Premium
Influence of amorphous alkaline lignin on the crystallization behavior and thermal properties of bacterial polyester
Author(s) -
Shichao Wang,
Hengxue Xiang,
Renlin Wang,
Zhe Zhou,
Meifang Zhu
Publication year - 2015
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.41325
Subject(s) - crystallization , materials science , nucleation , polyester , lignin , lamellar structure , amorphous solid , thermal stability , composite material , chemical engineering , polymer chemistry , chemistry , organic chemistry , engineering
Bacterial polyester poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) and alkaline lignin composites were prepared via melt processing method, and the influence of amorphous lignin on the crystallization behavior and thermal properties of PHBV were investigated. It was found that dual melting peaks appeared in DSC curves of PHBV/lignin composites, while only one single peak existed in PHBV. The non‐isothermal crystallization process analyzed by Jeziorny method suggested that lignin changed the nucleation mode of composites and hindered the crystallization rate of PHBV. Data calculated from the results of WAXD demonstrated that lignin did not change the basic crystal structure of PHBV, but decreased the average size of the lamellar stacks. POM results confirmed that the effect of lignin on the crystallization behavior of PHBV carried out in two opposite way, namely the enhanced effect of nucleation and the hindered effect of growth. Besides, the thermal stability of composites was also decreased significantly. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41325.