Characterization of Stereocomplex Polylactide/Nanoclay Nanocomposites
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Y. Srithep
Abstract
Poly(L-lactide) (PLLA)/poly(D-lactide) (PDLA)/nanoclay nanocomposites with nanoclay contents ranging from 1% to 8% w/w were prepared by melt blending using an internal mixer. Wide-angle X-ray diffraction (XRD) and differential scanning calorimetry (DSC) results confirmed that complete stereocomplex polylactide (PLA) crystallites without any homocrystallites were produced when equal amounts of PLLA and PLDA were mixed. The nanoclay in the stereocomplex polylactide nanocomposites acted as a nucleating agent that significantly enhanced stereocomplex crystallization, resulting in smaller and finer spherulites. Compared to neat PLLA, the melting temperature of the stereocomplex polylactide and its nanocomposites was about 55°C higher. The crystallization temperature of the stereocomplex nanocomposites was also 16°C and 55°C higher than that of the stereocomplex PLA and neat PLLA, respectively. These significant increases in transition temperatures improved the thermal stability of the stereocomplex nanocomposites compared to regular polylactide, which was confirmed by thermogravimetric analysis (TGA). The TGA results also showed that increasing nanoclay content increased the thermal stability of the stereocomplex nanocomposites. Finally, XRD and transmission electron microscopy showed an intercalation nanoclay basal spacing of 3.22 nm in the stereocomplex nanocomposites; a slight increase from the 1.86 nm basal spacing in the as-received nanoclay.
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Articles in the same Issue
- Contents
- Contents
- Editorial
- New Associate Editor for the Americas
- Regular Contributed Articles
- Effect of Flow Induced Orientation of Carbon Nanotubes on the Capillary Extrusion Behavior of Low-Density Polyethylene
- Mullins Effect under Compression Mode and its Reversibility of Thermoplastic Vulcanizate Based on Ethylene-Vinyl Acetate Copolymer/Styrene-Butadiene Rubber Blend
- Bio-Based Hybrid Polymers from Vinyl Ester Resin and Modified Palm Oil: Synthesis and Characterization
- Study on Crystal Form Transition and Non-Isothermal Crystallization of Glycidyl Methacrylate Grafted Isotactic Polybutene-1
- Flashing Method for Fabricating Micro Scale Fibers, Spheres, Porous and Condensed Polymer Structures
- Preparation and Performance Evaluation of SPEEK/Polyaniline Composite Membrane for Direct Methanol Fuel Cell
- Rotational Molding of Linear Low Density Polyethylene (LLDPE) Fumed Silica Nanocomposites
- Design Guidelines to Balance the Flow Distribution in Complex Profile Extrusion Dies
- Microstructure and Mechanical Properties of Nanocomposite Based on Polypropylene/Ethylene Propylene Diene Monomer/Graphene
- An Engineering Model that Simulates Pantographing Occurring in the Shaping Process of Reinforced Uncured Rubber Parts
- The Influence of Different Melt Temperatures on the Mechanical Properties of Injection Molded PA-12 and the Post Process Detection by Thermal Analysis
- Morphology and Thermal Behavior of TPU/PP Blends Modified with Maleic Anhydride Grafted SEBS-g-MA Block Copolymer
- Extrusion Blow Molding of Polymeric Blends Based on Thermotropic Liquid Crystalline Polymer and High Density Polyethylene
- Characterization of Stereocomplex Polylactide/Nanoclay Nanocomposites
- Attempts to Optimize the Dispersion State during Twin-Screw Extrusion of Polypropylene/Clay Nanocomposites
- Rapid Communications
- Improved Layer Mechanical Properties of Micro Injection Molded PP
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Editorial
- New Associate Editor for the Americas
- Regular Contributed Articles
- Effect of Flow Induced Orientation of Carbon Nanotubes on the Capillary Extrusion Behavior of Low-Density Polyethylene
- Mullins Effect under Compression Mode and its Reversibility of Thermoplastic Vulcanizate Based on Ethylene-Vinyl Acetate Copolymer/Styrene-Butadiene Rubber Blend
- Bio-Based Hybrid Polymers from Vinyl Ester Resin and Modified Palm Oil: Synthesis and Characterization
- Study on Crystal Form Transition and Non-Isothermal Crystallization of Glycidyl Methacrylate Grafted Isotactic Polybutene-1
- Flashing Method for Fabricating Micro Scale Fibers, Spheres, Porous and Condensed Polymer Structures
- Preparation and Performance Evaluation of SPEEK/Polyaniline Composite Membrane for Direct Methanol Fuel Cell
- Rotational Molding of Linear Low Density Polyethylene (LLDPE) Fumed Silica Nanocomposites
- Design Guidelines to Balance the Flow Distribution in Complex Profile Extrusion Dies
- Microstructure and Mechanical Properties of Nanocomposite Based on Polypropylene/Ethylene Propylene Diene Monomer/Graphene
- An Engineering Model that Simulates Pantographing Occurring in the Shaping Process of Reinforced Uncured Rubber Parts
- The Influence of Different Melt Temperatures on the Mechanical Properties of Injection Molded PA-12 and the Post Process Detection by Thermal Analysis
- Morphology and Thermal Behavior of TPU/PP Blends Modified with Maleic Anhydride Grafted SEBS-g-MA Block Copolymer
- Extrusion Blow Molding of Polymeric Blends Based on Thermotropic Liquid Crystalline Polymer and High Density Polyethylene
- Characterization of Stereocomplex Polylactide/Nanoclay Nanocomposites
- Attempts to Optimize the Dispersion State during Twin-Screw Extrusion of Polypropylene/Clay Nanocomposites
- Rapid Communications
- Improved Layer Mechanical Properties of Micro Injection Molded PP
- PPS News
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- Seikei Kakou Abstracts
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