The Importance of Coupling Agent on Tensile and Thermomechanical Performance of Annealed Composites Based on Poly(Lactic Acid)/Poly(Methyl Methacrylate) Matrix and Sisal Fiber Bundles

ABSTRACT

The main aim of this work is to study the importance of the coupling agent on tensile and thermomechanical performance of annealed composites based on poly (lactic acid)/poly (methyl methacrylate) matrix and sisal fiber bundles. As coupling agent poly (styrene‐co‐glycidyl methacrylate) copolymer was used. Results obtained in the current study suggested that the presence of the copolymer is crucial to form a strong adhesion between the fibers and polymeric matrix and consequently to improve both thermomechanical performance and tensile properties after annealing process. It must highlight that the estimated heat deflection temperature (HDT) of annealed composite with 40 wt% of fiber increased around 40 ºC respect to respect to commercial neat PLA.

摘要

研究偶联剂对聚乳酸/聚甲基丙烯酸甲酯（聚（乳酸）/聚（methylmethylarate）基体和剑麻纤维束复合材料的拉伸和热机械性能的影响. 采用苯乙烯-甲基丙烯酸缩水甘油酯共聚物作为偶联剂. 研究结果表明，共聚物的存在对纤维与聚合物基体之间形成很强的附着力，从而改善热机械性能和退火后的拉伸性能至关重要. 必须强调的是，相对于商用纯PLA，含有40 wt%纤维的退火复合材料的估计热变形温度（HDT）增加了约40℃.

KEYWORDS:

• Sisal fibers
• polymer-matrix composites
• mechanical properties
• thermomechanical properties

关键词:

• 剑麻纤维
• 聚合物基复合材料
• 机械性能
• 热机械性能

Acknowledgments

Authors are grateful for the financial support from the Basque Country Government in the frame 37-2017-00041 project and Spanish Ministry of Science and Technology PID2019-105090RB-I00. The authors also thank for technical and human support provided by SGIker of UPV/EHU and European funding (ERDF and ESF).

Additional information

Funding

This work was supported by the Eusko Jaurlaritza [KK-2018/00046]; Ministerio de Ciencia y Tecnología [PID2019-105090RB-I00].