高效PC防滴剂PTFE@PFAC核壳复合颗粒的合成

IF 5.5 Q1 ENGINEERING, CHEMICAL
Hang Wang, Wenwen Fan, Yifan Hu, Ruohan Zhang, Wen Yang, Haoyu Guo, Lan Lei, Chunjie Xie, Hui Li
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引用次数: 0

摘要

聚碳酸酯(PC)是一种工程塑料,因其具有优异的透明度、高强度和良好的再加工能力,被广泛应用于汽车制造和建筑材料等领域。但PC的防滴性能较差,在燃烧过程中容易产生熔滴,导致火势蔓延。这一缺点严重限制了PC机的应用范围。聚四氟乙烯(PTFE)具有优异的纤维成型能力、热稳定性和化学稳定性,可作为热塑性树脂生产中的防滴剂。本文以聚四氟乙烯为核心层,甲基丙烯酸甲酯、丙烯酸丁酯、氟丙烯酸酯为壳层,成功制备了一种新型氟丙烯酸酯包覆PTFE复合防滴剂(PTFE@PFAC颗粒)。PTFE@PFAC颗粒的直径在200-250 nm之间。与PC熔融共混后,成功制备了PC/PTFE@PFAC复合材料。发现一定量PTFE@PFAC颗粒的加入对PC/PTFE@PFAC复合材料的加工性、透明度、结晶度、抗拉强度和热稳定性影响不大。令人惊讶的是,添加少量PTFE@PFAC (0.5 wt %)可以显著提高复合材料的抗滴性能和阻燃性能,表现在抗滴时间延长、极限氧指数提高、放热速率和总产烟量显著降低。此外,PTFE@PFAC颗粒还可以作为一种高效的防滴剂用于PP复合材料的制备。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of PTFE@PFAC core-shell composite particle as a highly efficient anti-dripping agent for PC
Polycarbonate (PC) is kind of engineering plastics which is widely used in the fields such as automotive manufacturing and building materials due to its excellent transparency, high strength and good reprocessing ability. However, the anti-dripping performance of PC is poor and the PC is prone to producing molten droplets during the burning process, which can cause the spread of fire. This drawback severely limits the application range of PC. Owing to its excellent fiber forming ability, thermal stability and chemical stability, polytetrafluoroethylene (PTFE) could be applied as a kind of anti-dripping agent in the production of thermoplastic resins. In this work, a kind of novel fluorinated acrylate coated PTFE composite anti-dripping agent (PTFE@PFAC particle) was successfully prepared with the PTFE as the core layer and methyl methacrylate, butyl acrylate, and fluorinated acrylate as the shell layer. The diameter of the PTFE@PFAC particle is in the range of 200–250 nm. After melt blending with PC, PC/PTFE@PFAC composite was successfully prepared. It is found that the addition of a certain amount of PTFE@PFAC particles has little influence on the processability, transparency, crystallinity, tensile strength and thermal stability of PC/PTFE@PFAC composites. Surprisingly, the addition of a small amount of PTFE@PFAC (0.5 wt %) can significantly improves the anti-dripping and flame retardance properties of the composite, which was reflected in the extension of anti-dripping time, the increase of ultimate oxygen index, the significant reduction of heat release rate and the total smoke production. Furthermore, the PTFE@PFAC particle could also be used as an efficient anti-dripping agent in the preparation of PP composite.
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来源期刊
Chemical Engineering Journal Advances
Chemical Engineering Journal Advances Engineering-Industrial and Manufacturing Engineering
CiteScore
8.30
自引率
0.00%
发文量
213
审稿时长
26 days
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