Mechanical and thermal properties of melt processed PLA/organoclay nanocomposites

2nd International Conference on Mining, Material and Metallurgical Engineering

矿业工程;材料科学;冶金学

Ibrahim, Norazura^1 ; Jollands, Margaret^2 ; Parthasarathy, Rajarathinam^2

Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Shah Alam, Selangor

40450, Malaysia^1

Rheology and Materials Processing Centre, School of Civil, Environmental and Chemical Engineering, RMIT University, Melbourne, Australia^2

关键词: Degradation temperatures;    Mechanical and thermal properties;    Melt intercalation;    Melting point temperature;    Modulated differential scanning calorimetry;    Organically-modified layered silicates;    Strength and elongations;    Thermal behaviours;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/191/1/012005/pdf
DOI  :  10.1088/1757-899X/191/1/012005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Polylactic acid (PLA) and organically modified layered silicates (organoclay) with concentrations of 2-10 wt% were prepared by melt intercalation technique. The effects of organoclay on the mechanical and thermal properties of PLA were studied. Tensile properties were evaluated using an Instron Universal Tester. Modulated differential scanning calorimetry (MDSC) and Thermogravimetric analyses (TGA) were performed to study the thermal behaviour of the prepared composites. The nanocomposites exhibited superior improvement of practical materials properties such as Young's modulus and thermal stability, as compared to the neat PLA. The Young's modulus drastically increased, whereas tensile strength and elongation at break decreased. The maximum degradation temperature of the hybrid increased linearly with an increasing amount of organoclay. However, MDSC has determined that the glass transition, cold crystallisation, and melting point temperatures were not significantly influenced by the presence of organoclay.