基于碳纳米管和聚磷酸铵的力学性能优异且阻燃的聚（丙交酯）/聚（丁二酸丁二醇酯-对苯二甲酸酯）复合材料。
Mechanically robust and flame-retardant poly(lactide)/poly(butylene adipate-co-terephthalate) composites based on carbon nanotubes and ammonium polyphosphate.
机构信息
Anhui Province International Research Center on Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China; National and Local Joint Engineering Research Center for Special Wire and Cable Branch Center of Anhui Jianzhu University, Hefei 230601, China.
Anhui Province International Research Center on Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China; Provincial Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China.
出版信息
Int J Biol Macromol. 2022 Nov 30;221:573-584. doi: 10.1016/j.ijbiomac.2022.09.033. Epub 2022 Sep 8.
In order to synchronously improve mechanical and flame retardant properties of polylactide/poly(butylene adipate-co-terephthalate) (PLA/PBAT) composites, a series of multifunctional composites containing multi-walled carbon nanotubes (CNTs), ammonium polyphosphate (APP) and a commercial multifunctional epoxy oligomer (MEO) as chain extender were prepared via melt blending. The results show that the optimal flame retardant properties of PLA5-PBAT5/10A/6C composite containing 6 % CNTs and 10 wt% APP, presented the limited oxygen index reached 28.3 % and exhibited a decrease in peak heat release rate (pHRR) and total heat release (THR) to 368 kJ/m and 72 MJ/m, respectively because of the co-continuous phase, CNTs network and condensed effect of APP. Meanwhile, the construction of co-continuous phases endows PLA5-PBAT5 with better mechanical compared to PLA8-PBAT2 composites. The elongation at break reaches (245.9 %) and notched impact strength (16.5 kJ/m) of PLA5-PBAT5/10A/6C were higher than the PLA8-PBAT2/10A/6C by 16.0 and 283.7 %.
为了同步提高聚乳酸/聚对苯二甲酸丁二醇酯共聚物（PLA/PBAT）复合材料的力学性能和阻燃性能，通过熔融共混制备了一系列含有多壁碳纳米管（CNTs）、磷酸铵（APP）和商业多功能环氧低聚物（MEO）作为扩链剂的多功能复合材料。结果表明，当 PLA5-PBAT5 中 CNTs 和 APP 的含量分别为 6%和 10wt%时，复合材料 PLA5-PBAT5/10A/6C 具有最佳的阻燃性能，其极限氧指数达到 28.3%，峰值热释放速率（pHRR）和总热释放（THR）分别降低到 368kJ/m 和 72MJ/m，这是因为存在连续相共连续、CNTs 网络和 APP 的凝聚效应。同时，共连续相的构建使 PLA5-PBAT5 具有比 PLA8-PBAT2 复合材料更好的力学性能。PLA5-PBAT5/10A/6C 的断裂伸长率（245.9%）和缺口冲击强度（16.5kJ/m）分别比 PLA8-PBAT2/10A/6C 高 16.0%和 283.7%。
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