高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (12): 2903.doi: 10.7503/cjcu20130419

• 高分子化学 • 上一篇    

MgAlZnFe-CO3 LDHs对PBS膨胀阻燃体系性能的影响

刘跃军, 毛龙   

  1. 湖南工业大学包装新材料与技术重点实验室, 株洲 412007
  • 收稿日期:2013-05-06 出版日期:2013-12-10 发布日期:2013-09-02
  • 作者简介:刘跃军,男,博士,教授,主要从事包装新材料与技术研究. E-mail:yjliu_2005@126.com
  • 基金资助:

    国家自然科学基金(批准号:11372108);教育部新世纪优秀人才支持计划(批准号:NCET-10-0161)和湖南省高校创新平台开放基金(批准号:13K098)资助.

Effect of MgAlZnFe-CO3 LDHs on Fire Retardancy and Mechanical Properties of Intumescent Flame Retardant Poly(butylene succinate) Composites

LIU Yue-Jun, MAO Long   

  1. Key Laboratory of New Materials and Technology for Packaging, Hunan University of Technology, Zhuzhou 412007, China
  • Received:2013-05-06 Online:2013-12-10 Published:2013-09-02

摘要:

采用恒定pH值共沉淀法在自制反应器中合成了不同原料配比的碳酸根型镁铝锌铁层状双羟基金属氧化物(MgAlZnFe-CO3 LDHs),并通过熔融共混MgAlZnFe-CO3 LDHs、聚磷酸铵(APP)、三聚氰胺(MA)和全降解材料聚丁二酸丁二醇酯(PBS)制备出PBS膨胀阻燃材料. 采用傅里叶红外光谱(FTIR)、热失重(TG)、X射线衍射(XRD)、扫描电子显微镜(SEM)及元素分析(ICP)对MgAlZnFe-CO3 LDHs进行了表征,并对PBS膨胀体系进行了力学性能和阻燃性能等测试. 结果表明,当Mg2+,Zn2+,Al3+和Fe3+的摩尔比为9:3:3:1时,合成的MgAlZnFe-CO3 LDHs热稳定性最好,晶态结构规整,呈形貌规则的六边形片状;当MgAlZnFe-CO3 LDHs的添加质量分数为1%时(阻燃剂的总添加质量分数为20%)时,PBS膨胀阻燃体系的极限氧指数(LOI)达到35%,垂直燃烧测试达到UL-94 V-0级别,力学性能得到较大改善. 实验结果表明,低添加量的MgAlZnFe-CO3 LDHs与膨胀阻燃剂(IFR)协效阻燃PBS,一方面能够改善膨胀阻燃剂恶化PBS力学性能的现象,另一方面协同效应能够明显提高PBS的阻燃性能.

关键词: 聚丁二酸丁二醇酯, 碳酸根型镁铝锌铁层状双羟基金属氧化物, 膨胀阻燃, 力学性能

Abstract:

MgAlZnFe-CO3 layered double hydroxides(LDHs) with different proportions of metal ions were prepared by the constant pH coprecipitation method. Ammonium polyphosphate(APP), melamine(MA), and MgAlZnFe-CO3 LDHs were added in poly(butylene succinate) via melt blending to obtain the novel intumescent flame retardant poly(butylene succinate)(IFR-PBS) composites with MgAlZnFe-CO3 LDHs as a synergistic agent. The synthesized MgAlZnFe-CO3 LDHs were characterized by X-ray diffraction(XRD), Inductive coupled phasmamass spectrometer(ICP) and scanning electron microscope(SEM). Consequently, the layered structures of the synthesized MgAlZnFe-CO3 LDHs were observed. The fire retardancy and mechanical properties of the novel IFR-PBS composites were also evaluated. Compared to those of IFR-PBS composites without MgAlZnFe-CO3 LDHs, the limiting oxygen index(LOI) values of the novel IFR-PBS composites increased from 30% to 35% and the vertical flammability(UL-94) reached V-0 rate when the content of MgAlZnFe-CO3 LDHs was 1%(the total loading of flame retardant was 20%). Importantly, the tensile strength and flexural strength of the novel IFR-PBS composites could be enhanced by the presence of MgAlZnFe-CO3 LDHs.

Key words: Poly(butylene succinate), MgAlZnFe-CO3 LDHs, Intumescent flame retardant, Mechanical property

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