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

• Published in: Journal of applied polymer science Vol. 133; no. 42; pp. np - n/a
• Main Authors: Magalhães da Silva, Sara P., Lima, Paulo S., Oliveira, José M.
• Format: Journal Article
• Language: English
• Published: Hoboken Blackwell Publishing Ltd 10.11.2016; Wiley Subscription Services, Inc
• Subjects: compatibilization; composites; Cork; Crystallization; Differential scanning calorimetry; differential scanning calorimetry (DSC); Injection molding; kinetics; Maleic anhydride; Materials science; Polymer matrix composites; Polymers; Polypropylenes; Reagents; New York; United States > US
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.44124

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 °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. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44124.