Zhao Pengcheng, Liu Zhiqi, Wang Xueyi, Pan Ye-Tang, Kuehnert Ines, Gehde Michael, Wang De-Yi, Leuteritz Andreas
Verarbeitungsprozesse, Leibniz Institut für Polymerforschung Dresden e. V. Hohe Straße 6 01069 Dresden Germany
Fakultät für Maschinenbau, Technische Universität Chemnitz Reichenhainer Straße 70 09126 Chemnitz Germany.
RSC Adv. 2018 Dec 18;8(73):42189-42199. doi: 10.1039/c8ra08531e. eCollection 2018 Dec 12.
In this study, a novel bio-based flame retardant material consisting of modified vanillin and poly(lactic acid) (PLA) was developed by incorporation of newly discovered additive, bis(5-formyl-2-methoxyphenyl) phenylphosphonate (VP), into the PLA matrix. The chemical structure of VP was confirmed by H-, C- and P NMR and FTIR. The flame retardancy, thermal behavior as well as the mechanical properties of PLA/VP composites were evaluated. With 5 wt% of VP, the LOI of PLA increased from 21.4 to 25.8 and passed the UL-94 V-0 classification. Additionally, the elongation at break was improved from 3% to 11% without sacrificing tensile strength. In an effort to understand the mechanisms, TGA-FTIR, TGA and SEM were performed. This paper suggests a new possibility to prepare polymeric composites with enhanced flame retardancy from sustainable resources.
在本研究中，通过将新发现的添加剂双（5-甲酰基-2-甲氧基苯基）苯基膦酸酯（VP）引入聚乳酸（PLA）基体中，开发了一种由改性香草醛和聚乳酸（PLA）组成的新型生物基阻燃材料。通过氢、碳和磷核磁共振以及傅里叶变换红外光谱确认了VP的化学结构。评估了PLA/VP复合材料的阻燃性、热行为以及力学性能。添加5 wt%的VP后，PLA的极限氧指数从21.4提高到25.8，并通过了UL-94 V-0等级。此外，断裂伸长率从3%提高到11%，同时不牺牲拉伸强度。为了了解其作用机理，进行了热重-傅里叶变换红外光谱、热重分析和扫描电子显微镜分析。本文提出了一种利用可持续资源制备具有增强阻燃性的聚合物复合材料的新可能性。
