Stiff Biodegradable Polylactide Composites with Ultrafine Cellulose Filler

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• 作者：Michal Cichorek ; Ewa Piorkowska…
• 关键词：Polylactide ; Native cellulose ; Composites ; Mechanical properties ; Thermal properties
• 刊名：Journal of Polymers and the Environment
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：25
• 期：1
• 页码：74-80
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences;
• 出版者：Springer US
• ISSN：1572-8900
• 卷排序：25

文摘

Polylactide (PLA) composites with 10–30 wt% of commercial fine grain filler of native cellulose were prepared by melt-mixing, and examined. The composite films had esthetic appearance, glossy surface, creamy color and density close to that of neat PLA. Good dispersion of the filler in PLA matrix was achieved. The composites were stiffer than neat PLA; in the glassy region the storage modulus increased by approx. 30 %. The tensile strength of the composite materials in the temperature range from 25 to 45 °C was similar to that of neat PLA. No marked decrease in molar mass of PLA in the composites occurred during processing in comparison to neat PLA. Moreover, thermogravimetry experiments demonstrated good thermal stability of the composites; 5 % weight loss occurred well above 300 °C.