高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (12): 2337.doi: 10.7503/cjcu20170227

• 高分子化学 • 上一篇    下一篇

含磷/氮/硫环交联磷腈微纳米管的合成及对环氧树脂的阻燃作用

赵师师1, 贺梦1, 宋文尧1, 张冲1, 徐建中1, 马海云1,2()   

  1. 1. 河北大学化学与环境科学学院,保定 071002
    2. 河北省分析科学技术重点实验室, 保定 071002
  • 收稿日期:2017-04-13 出版日期:2017-12-10 发布日期:2017-11-07
  • 作者简介:联系人简介: 马海云, 男, 博士, 副教授, 主要从事高分子纳米材料研究. E-mail: coffee1123@126.com
  • 基金资助:
    高等学校博士学科点专项科研基金(新教师类)(批准号: 20131301120006)和教育部留学回国人员科研启动基金资助

Synthesis of a Phosphorus/Nitrogen/Sulphur Containing Phosphazene Micro-Nanotube and Its Flame Retardancy on Epoxy Nanocomposite

ZHAO Shishi1, HE Meng1, SONG Wenyao1, ZHANG Chong1, XU Jianzhong1, MA Haiyun1,2,*()   

  1. 1. College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China
    2. Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding 071002, China
  • Received:2017-04-13 Online:2017-12-10 Published:2017-11-07
  • Contact: MA Haiyun E-mail:coffee1123@126.com
  • Supported by:
    Supported by the Research Fund for the Doctoral Program of Higher Education of China(No.20131301120006) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministy, China

摘要:

采用原位模板法, 以六氯环三磷腈(HCCP)和二羟基二苯砜(BPS)为原料合成了一种环状交联型不溶不熔的磷腈大分子——聚环三磷腈-二羟基二苯砜(PZS)微纳米管, 研究了PZS对环氧树脂(EP)的阻燃作用及阻燃机理. 利用红外光谱(FTIR)、 扫描电子显微镜(SEM)及透射电子显微镜(TEM)对PZS微纳米管进行了表征; 采用热重分析(TG)考察了EP/PZS阻燃材料的热稳定性, 并通过极限氧指数(LOI)和微型量热分析(MCC)测试了EP/PZS的阻燃性能. 热降解实验结果表明, PZS微纳米管的加入使环氧树脂热降解温度降低, 但残炭率显著提高. PZS微纳米管可以显著提高环氧树脂的阻燃性能, 当阻燃剂添加量为5%时, 环氧树脂的残炭率提高了46%, 热释放速率峰值降低了约40%; LOI值从纯环氧树脂的26.0%提高到了30.6%. PZS微纳米管的加入还增强了环氧树脂的力学强度. 阻燃性能的显著提高和力学性能的改善归因于PZS微纳米管在环氧树脂基体中的良好分散, 以及燃烧炭化过程中生成的石墨化程度较高的类石墨烯结构的残炭, 具有较高的抗氧化能力. 研究结果表明, PZS微纳米管是一种优良、 高效的具有潜在应用价值的阻燃剂.

关键词: 含磷/氮/硫交联磷腈微纳米管, 阻燃, 环氧树脂, 聚环三磷腈-二羟基二苯砜

Abstract:

A highly cross-linked poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol)(PZS) nanotubes were synthesized via an in situ template method using cyclotriphosphazene(HCCP) and 4,4'-sulfonyldiphenol(BPS) as raw materials. PZS micro-nanotubes were applied on epoxy resin(EP) and the flame retarded mechanism was studied. The PZS micro-nanotubes were characterized by SEM, TEM, EDS and element Mapping. The thermalstability of PZS/EP nanocomposites were explored through TG, as compared to that of EP, and the flammability was investigated by microscale combustion calorimeter(MCC) and limit oxygen index(LOI) tests. The TGA results showed that a decreased initial degradation temperature, the residue chars were greatly improved. The flame retardancy was significantly enhanced by the addition of PZS micro-nanotubes. The residue char was improved 46% and the heat release rate was reduced 40% under addition of PZS micro-nanotubes(5%). The LOI value was also improved from 26.0% to 30.6%. The mechanical strength was also improved by the addition of PZS micro-nanotubes. The improvement of flame retardancy can be ascribed to the good dispersion and the formation of graphene-like structure during combustion of PZS/EP nanocomposites. In conclusion, PZS micro-nanotube is a kind of excellent flame retardant with potential application value.

Key words: Phosphorus/Nitrogen/Sulphur containing phosphazene micro-nanotube, Flame retardancy, Epoxy, Poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol)

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