Non-isothermal crystallization kinetics of cork-polymer composites for injection molding

authors	da Silva, SPM; Lima, PS; Oliveira, JM
nationality	International
journal	JOURNAL OF APPLIED POLYMER SCIENCE
author keywords	compatibilization; composites; crystallization; differential scanning calorimetry (DSC); kinetics
keywords	REINFORCED POLYPROPYLENE COMPOSITES; THERMAL-PROPERTIES; FIBER/POLYPROPYLENE COMPOSITES; RECYCLED POLYPROPYLENE; WOOD FLOUR; FIBER; PARAMETERS; BIOCOMPOSITES; BEHAVIOR; LIGNIN
abstract	The non-isothermal crystallization behavior of cork-polymer composites (CPC) based on polypropylene (PP) matrix was studied. Using differential scanning calorimetry (DSC), the crystallization behavior of CPC with 15 wt % cork powder at different cooling rates (5, 10, 15, and 20 degrees C/min) was studied. The effect of a coupling agent based on maleic anhydride was also analyzed. A composite (PPg) containing polypropylene grafted maleic anhydride (PPgMA) and PP was prepared for comparison purposes. Crystallization kinetic behavior was studied by Avrami, Ozawa, Liu, and Kissinger methods. The Ozawa method fails to describe the behavior of these composites. Results show that cork powder surface acts as a nucleating agent during non-isothermal crystallization, while the addition of PPgMA decreases the crystallization rate. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44124.
publisher	WILEY-BLACKWELL
issn	0021-8995
year published	2016
volume	133
issue	42
digital object identifier (doi)	10.1002/app.44124
web of science category	Polymer Science
subject category	Polymer Science
unique article identifier	WOS:000380723800019