Synthesis of Phosphazene Derivative Modified <italic style="font-style: italic">α</italic> -Zirconium Phosphate and Its Effect on the Flame Retardancy and Mechanical Properties of Silicone Rubber in Combination with Ammonium Polyphosphate

Yong Ding; Yuan-fang Luo; Feng Xue; Zhi-xin Jia; De-min Jia

doi:10.11777/j.issn1000-3304.2017.17005

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Synthesis of Phosphazene Derivative Modified α -Zirconium Phosphate and Its Effect on the Flame Retardancy and Mechanical Properties of Silicone Rubber in Combination with Ammonium Polyphosphate

Research Article | 更新时间：2021-01-26

- Synthesis of Phosphazene Derivative Modified α -Zirconium Phosphate and Its Effect on the Flame Retardancy and Mechanical Properties of Silicone Rubber in Combination with Ammonium Polyphosphate
- Acta Polymerica Sinica Issue 11, Pages: 1796-1805(2017)
- 作者机构：
  
  华南理工大学材料科学与工程学院广州 510640
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.17005
  CLC：
- Published：20 November 2017，
  
  Received：7 January 2017，
  
  Revised：20 March 2017，
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Yong Ding, Yuan-fang Luo, Feng Xue, Zhi-xin Jia, De-min Jia. Synthesis of Phosphazene Derivative Modified α -Zirconium Phosphate and Its Effect on the Flame Retardancy and Mechanical Properties of Silicone Rubber in Combination with Ammonium Polyphosphate. [J]. Acta Polymerica Sinica (11):1796-1805(2017)
DOI：

Yong Ding, Yuan-fang Luo, Feng Xue, Zhi-xin Jia, De-min Jia. Synthesis of Phosphazene Derivative Modified α -Zirconium Phosphate and Its Effect on the Flame Retardancy and Mechanical Properties of Silicone Rubber in Combination with Ammonium Polyphosphate. [J]. Acta Polymerica Sinica (11):1796-1805(2017) DOI： 10.11777/j.issn1000-3304.2017.17005.

摘要

利用原位插层反应制得磷腈类衍生物修饰的改性磷酸锆（F-ZrP），并用机械共混工艺制得阻燃硅橡胶复合材料（FRSR）.采用X射线衍射（XRD）、透射电子显微镜（TEM）、傅立叶红外光谱（FTIR）、热重（TG）、扫描电子显微镜（SEM）分别对磷酸锆的结构及其在硅橡胶基体的分散进行表征，并结合FRSR的垂直燃烧（UL-94）、极限氧指数（LOI）、锥形量热测试及残渣表面形貌的观察，研究了不同份数的F-ZrP复配聚磷酸铵对FRSR阻燃性能的影响并和添加未改性磷酸锆的样品性能对比，并对阻燃机理进行初步探讨；最后分析FRSR的力学性能.结果表明：F-ZrP拥有更大的层间距，而且在FRSR中分散的更好；当1 phr F-ZrP和19 phr APP复配使用时，UL-94达V-0级且LOI值为31.4，热释放速率峰值为265.3 kW/m

，拉伸强度达8.11 MPa，FRSR的阻燃性能和力学性能得到明显的改善.适量的F-ZrP和APP复配使用能在气相和固相发挥协效阻燃作用，F-ZrP与APP的并用能提高残渣质量并且使阻隔层更加紧实，致密.

Abstract

A novel functionalized

-zirconium phosphate (F-ZrP) was synthesized by phosphazene derivative

via

in situ

intercalation

modified by dicyandiamide (DICY)

and then combined with hexachlorocyclotriphosphazene (HCCP) through nucleophilic substitution and further reacted with excessive DICY. Flame retardant silicone rubber composites (FRSR) were prepared

via

incorporation of F-ZrP and ammonium polyphosphate (APP) with silicone rubber by mechanical blending. The structure of F-ZrP and its morphology in silicone rubber were tested by X-ray diffraction (XRD)

transmission electronic microscopy (TEM)

thermogravimetric analysis (TGA)

Fourier transform infrared spectroscopy (FTIR) and scanning electronic microscopy (SEM). The results show that the interlayer spacing of F-ZrP was larger compared with that of

-ZrP and phosphazene derivative efficiently combined with

-ZrP. F-ZrP existed with a structure of the intercalated components in FRSR. The effect of F-ZrP on the thermal stability and flame retardancy of FRSR in combination with APP was studied by TGA

vertical burning test (UL-94)

limiting oxygen index (LOI) and Cone calorimeter test. TGA results illustrated that an optimal F-ZrP content could improve the thermal stability and char residue. The addition of F-ZrP to FRSR increased the LOI value and enhanced the UL-94 rating. When the total content of the flame retardants was 20 phr and the mass ratio of F-ZrP to APP was 1:19

LOI value of FRSR was increased from 30.0 to 31.4

UL-94 rating was enhanced to V-0

and the peak heat release rate was 265.3 kW/m

. The morphology and structure of the char residue were characterized by SEM. The results suggested that the combination of F-ZrP and APP could make the char residue more stable

compact

and continuous

delaying therefore the volatilization of the decomposition product and inhibiting underlying FRSR from contacting heat and oxygen. These results indicated that there was a synergistic flame retardancy effect in gas phase and condensed phase between F-ZrP and APP for FRSR. Moreover

the mechanical properties could be reinforced with an appropriate content of F-ZrP.

关键词

阻燃硅橡胶磷酸锆阻燃性能力学性能原位插层

Keywords

Flame retardant silicone rubberZirconium phosphateFlame retardancyMechanical propertiesIn situ intercalative

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Polymer Research Institute, Sichuan University, State Key Laboratory of Polymer Materials Engineering

Department of Polymer Science and Engineering, Zhejiang University

College of Materials Science and Engineering, Qingdao University

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University

College of Materials Science & Engineering, Taiyuan University of Technology

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⁰

Synthesis of Phosphazene Derivative Modified α -Zirconium Phosphate and Its Effect on the Flame Retardancy and Mechanical Properties of Silicone Rubber in Combination with Ammonium Polyphosphate

DOI：10.11777/j.issn1000-3304.2017.17005

摘要

Abstract

关键词

Keywords

references