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首页> 外文期刊>Polymers for advanced technologies >Properties and characteristics of polylactide blends: Synergistic combination of poly(butylene succinate) and flame retardant
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Properties and characteristics of polylactide blends: Synergistic combination of poly(butylene succinate) and flame retardant

机译：聚丙环共混物的性质和特征：聚（丁二烯琥珀酸酯）和阻燃剂的协同组合

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A study on the influence of flame-retardant types, poly(butylene succinate) (PBS) contents, and combination of flame retardant and PBS on the mechanical, thermal, morphological, and flame retardancy properties of polylactide (PLA) and PLA/PBS blends was investigated. Blending of PLA, PBS, and flame retardant was prepared by a twin screw extruder. Tricresyl phosphate (TCP) and montmorillonite (MMT) were used as a flame retardant, whereas PBS acted as a flexible material for enhancing the fire resistance and toughness of PLA, respectively. The results revealed that the introducing of TCP and MMT greatly improved the impact strength of the PLA. The impact toughness of PLA blends with 20wt% of PBS increased to about 244% that of neat PLA. The addition of flame retardants markedly improved the limiting oxygen index of PLA from 18.0% to 30.1% and 24.3% for the blends containing TCP and MMT. The V-0 rating in UL-94 testing was achieved with PLA/TCP blend. Elongation at break, impact toughness, and thermal stability of PLA significantly increased with the increment of PBS concentration. The synergistic effect of flame retardant and PBS afforded the PLA blends with outstanding increase of impact resistance. Furthermore, the flame retardant of TCP in the system not only affected dripping behavior and total flame time of PLA/PBS blends but also improved limiting oxygen index values due to the forming of char layer and inhibiting of burning mechanism.
机译：研究了阻燃剂类型、聚丁二酸丁二醇酯（PBS）含量以及阻燃剂与PBS的组合对聚乳酸（PLA）和PLA/PBS共混物的力学、热学、形态和阻燃性能的影响。在双螺杆挤出机上制备了聚乳酸、PBS和阻燃剂的共混物。磷酸三甲苯酯（TCP）和蒙脱土（MMT）被用作阻燃剂，而PBS则分别用作增强PLA耐火性和韧性的柔性材料。结果表明，TCP和MMT的引入大大提高了PLA的冲击强度。PBS含量为20wt%的PLA共混物的冲击韧性提高到纯PLA的244%左右。对于含有TCP和MMT的共混物，阻燃剂的加入使PLA的极限氧指数分别从18.0%提高到30.1%和24.3%。UL-94测试中的V-0评级是通过PLA/TCP混合物实现的。随着PBS浓度的增加，PLA的断裂伸长率、冲击韧性和热稳定性显著提高。阻燃剂和PBS的协同作用使PLA共混物的抗冲击性能显著提高。此外，体系中TCP的阻燃剂不仅影响PLA/PBS共混物的滴落行为和总燃烧时间，而且由于炭层的形成和燃烧机理的抑制，提高了极限氧指数。

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