Competition between α and β Crystallization in Isotactic Polypropylene: Effect of Nucleating Agents Composition
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S.-W. Wang
Abstract
Based on the different nucleation ability, different contents and proportions of the mixed nucleating agents were melt compounded with pure isotactic polypropylene resins employed in this work, selective β nucleating agent was a compound of pimelic acid and calcium stearate, the α nucleating agent was a type of dibenzylidene sorbitol derivative. The competition attributed to the different type of interactions between a nucleating agent and isotactic polypropylene molecular chains during crystallization was investigated in this research. For a low content of the mixed nucleating agents used, α nucleation dominated the crystallization behavior of isotactic polypropylene, while with an increase of the content of the mixed nucleating agents, the situation was reversed and β nucleation became dominant. In the β dominated region, both of the molecular chain and segmental motions were various with different nucleating agent proportion. Thus, the content and proportion of the components of the nucleating agents were the critical factors in the competition during crystallization.
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© 2015, Carl Hanser Verlag, Munich
Artikel in diesem Heft
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Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Anti-Aging Performance of Cardanol Grafted onto Polypropylene by Reactive Extrusion
- Co-Extrusion Layer Multiplication of Rheologically Mismatched Polymers: A Novel Processing Route
- Synthesis and Characterization of Acrylated Epoxidized Flaxseed Oil for Biopolymeric Applications
- Processing of Soju Industrial Bioresidue to Extract Microcrystalline Cellulose and Characterization
- Competition between α and β Crystallization in Isotactic Polypropylene: Effect of Nucleating Agents Composition
- Thermal and Flexural Properties and Water Absorption of Caulis Spatholobi Residue Fiber Reinforced Biodegradable Poly(propylene carbonate) Composites
- The Mechanical Properties of Plasticized PVC Processed in an Extruder with a Modified Feed Zone
- Prediction and Validation of Short Fiber Orientation in a Complex Injection Molded Part with Chunky Geometry
- Microthermoforming Integrated in the Injection Molding Process for Fabrication of Film-Based Microstructured Parts
- Modification Induced in Light Diffusing Polycarbonate due to Proton Irradiation
- Surface Quenching Induced Microstructure Transformations in Extrusion Foaming of Porous Sheets
- Repercussion of Cenosphere Filler Size on Mechanical and Dry Sliding Wear Peculiarity of Glass Fiber-Reinforced Polyester Composites Using Taguchi Analysis and Neural Network
- Rapid Communications
- PPy Doped with DBSA and Combined with PSS to Improve Processability and Control the Morphology
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts
