Natural fiber‐reinforced composites are gaining significant popularity for their biodegradability and eco‐friendliness. Fiber modifications and hybridization have been used to address issues like hydrophilicity and fiber inhomogeneity. However, efficient manufacturing is still a challenge for natural fiber‐reinforced polymer composites. The present study explores the potential of microwave processing of hybrid laminates composed of sisal and jute fibers. The laminates, consisting of linear low‐density polyethylene (LLDPE) as matrix and sisal and jute as reinforcement materials were subjected to microwave processing at specific power, time, frequency, and loads. Four types of laminates with different stacking sequences: sisal‐sisal‐sisal (SSS), sisal‐jute‐sisal (SJS), jute‐sisal‐jute (JSJ), and jute‐jute‐jute (JJJ) were developed. The developed composites showed ~3% void content, with the SJS and JSJ composite having the least and highest void content, respectively. The SJS composite showed the highest tensile and flexural strength of 15.27 and 20.40 MPa, respectively, out of all the configurations and an improvement of 42% and 85% over pure LLDPE. Hybrid composites having high‐strength fibers in the skin layer exhibited superior mechanical properties. Microscopic examination of the fractured specimens revealed that fiber pull‐out and fiber breakage were the primary failure mechanisms of failure. Lateral failure due to delamination between matrix and fiber was predominant with grip and gauge regions as frequent failure points. The incorporation of sisal and jute fiber reinforcement into the polymers doesn't change the thermal stability of the fabricated composites significantly. The above results show that microwave‐assisted processing is a promising method for producing natural fiber‐reinforced hybrid polymer composites.Highlights Development of hybrid laminates using microwave energy at 2.45 GHz. The mechanism of microwave‐based processing of polymer composites has been discussed. Effect of layering sequence on mechanical and thermal properties of the developed composite. Assessment of tensile strength with morphology, flexural strength and thermo‐gravimetric analysis.

中文翻译：

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微波加工线性低密度聚乙烯剑麻/黄麻混合层压板的开发和表征

天然纤维增强复合材料因其可生物降解性和生态友好性而受到广泛欢迎。纤维改性和杂交已用于解决亲水性和纤维不均匀性等问题。然而，高效制造仍然是天然纤维增强聚合物复合材料的挑战。本研究探讨了由剑麻和黄麻纤维组成的混合层压材料的微波加工潜力。该层压板由线性低密度聚乙烯（LLDPE）作为基体，剑麻和黄麻作为增强材料，在特定的功率、时间、频率和负载下进行微波处理。开发了四种具有不同堆叠顺序的层压板：剑麻-剑麻-剑麻（SSS）、剑麻-黄麻-剑麻（SJS）、黄麻-剑麻-黄麻（JSJ）和黄麻-黄麻-黄麻（JJJ）。开发的复合材料显示约 3% 的空隙含量，其中 SJS 和 JSJ 复合材料的空隙含量分别最低和最高。在所有配置中，SJS 复合材料表现出最高的拉伸强度和弯曲强度，分别为 15.27 MPa 和 20.40 MPa，比纯 LLDPE 提高了 42% 和 85%。表层具有高强度纤维的混合复合材料表现出优异的机械性能。对断裂样本的显微镜检查表明，纤维拔出和纤维断裂是主要的失效机制。由于基体和纤维之间的分层导致的横向失效是主要的，抓地力和规格区域是常见的失效点。将剑麻和黄麻纤维增强材料掺入聚合物中不会显着改变所制造的复合材料的热稳定性。上述结果表明微波辅助加工是生产天然纤维增强杂化聚合物复合材料的一种有前景的方法。 使用 2.45 GHz 微波能量开发混合层压板。 讨论了聚合物复合材料的微波加工机理。 分层顺序对所开发复合材料的机械和热性能的影响。 通过形态、弯曲强度和热重分析评估拉伸强度。