Abstract
Polystyrene (PP)/organoclay (OMMT) blends were prepared by co-rotating twin-screw extruder. The effects of OMMT on isothermal crystallization behaviors of blends was studied by differential scanning calorimetry (DSC). Using Avrami equation analysis the crystallization kinetics of materials. The analysis result shows that the OMMT act as effective nucleating agents, accelerating the crystallization of PP, then lead the rate of crystallization increased. Avrami exponent n is between 2.04~3.57, which indicating that PP/OMMT blends crystallization process might correspond to a two-dimensional or three-dimensional growth process. The activation enerigies for isotheraml crystallization were determined by the Arrhenius equation.
Highlights
Polypropylene is one of widely used polyolefins as an engineering plastic
X(t) is the relative degree of crystallinity at time, t, obtained from the area of the differential scanning calorimetry (DSC) exothermic peak at time t divided by the total area under the exothermic peak as shown in Eq (1)
The values ofE for PP/OMMT blends are higher than that of pure PP
Summary
Polypropylene is one of widely used polyolefins as an engineering plastic. The crystallization of PP matrix blends have been reported, such as PP/PA6 [6], PP/PC/nanosilica [7] and PP/graphene[8]. Z.T. Tao et al.[10] studied the shell waste incorporated to reinforce polypropylene and investigated the crystallization by DSC. It is necessary to study the isothermal crystallization kinetics of composties incorporating crystallizable polymers because the practical production processes usually proceed under isothermal crystallization conditions. The isothermal crystallization researches can offer significant information for optimizing processing parameters. Organoclay was used to prepare the PP/OMMT composites and studied the isothermal crystallization kinetics of the blends by differential scanning calorimetry (DSC). The activation energies for isothermal crystallization were determined by the Arrhenius equation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
