An Efficient Halogen-free Flame Retardant for Polyethylene: Piperazinemodified Ammonium Polyphosphates with Different Structures

Shi-fu Liao; Cong Deng; Sheng-chao Huang; Jing-yu Cao; Yu-zhong Wang

doi:10.1007/s10118-016-1855-8

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An Efficient Halogen-free Flame Retardant for Polyethylene: Piperazinemodified Ammonium Polyphosphates with Different Structures

PAPERS | Updated：2021-05-12

- An Efficient Halogen-free Flame Retardant for Polyethylene: Piperazinemodified Ammonium Polyphosphates with Different Structures
- Chinese Journal of Polymer Science Vol. 34, Issue 11, Pages: 1339-1353(2016)
- Affiliations：
  
  Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan);Analytical and Testing Center, Sichuan University, Chengdu 610064, China
- Author bio：
  
  Cong Deng(邓聪),E-mail:dengcong@scu.edu.cn
  Yu-zhong Wang(王玉忠),E-mail:yzwang@scu.edu.cn
- Funds：
- DOI：10.1007/s10118-016-1855-8
  CLC：
- Received：25 May 2016，
  
  Revised：2016-6-21，
  
  Accepted：28 June 2016，
  
  Published：2016-11
- Accepted：
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Shi-fu Liao, Cong Deng, Sheng-chao Huang, et al. An Efficient Halogen-free Flame Retardant for Polyethylene: Piperazinemodified Ammonium Polyphosphates with Different Structures[J]. Chinese Journal of Polymer Science, 2016, 34(11): 1339-1353.
DOI：

Shi-fu Liao, Cong Deng, Sheng-chao Huang, et al. An Efficient Halogen-free Flame Retardant for Polyethylene: Piperazinemodified Ammonium Polyphosphates with Different Structures[J]. Chinese Journal of Polymer Science, 2016, 34(11): 1339-1353. DOI： 10.1007/s10118-016-1855-8.

摘要

Abstract

In this study

piperazine-modified ammonium polyphosphates (PA-APPs) with hierarchical structure were synthesized through ion exchange reaction.

H nuclear magnetic resonance (

H-NMR)

Fourier transform infrared spectra (FTIR)

elemental analysis (EA)

and inductively coupled plasma atomic emission spectroscopy (ICP-AES) confirmed that the PA-APPs with different structures were prepared successfully. Then these flame retardants were used alone as monocomponent intumescent flame retardant for low-density polyethylene (LDPE). Combustion tests demonstrated that the flameretardant efficiency of PA-APP containing about 7 wt% carbon (PA-APP

) was significantly higher than that of the other PAAPPs with more or less carbon. The flame-retarded LDPE system with 30 wt% PA-APP

passed the UL-94 V-0 rating

and had the oxygen index (LOI) of 33.0%. Thermal analysis illustrated that the thermal decomposition behavior of PA-APP changed with incorporating different contents of PA. For all these PA-APPs

PA-APP

showed higher thermal stability than the other PA-APP flame retardants. All the experimental results proved that PA-APP

could reach the balance of an acid source

a blowing source

and a charring source as a mono-component intumescent flame retardant for LDPE. Further

it led to the formation of a compact intumescent char layer containing the structures of rich P-O-P

P-N-C

C=C

etc. during burning which in turn resulted in the excellent flame-retardant efficiency of PA-APP

关键词

Keywords

references

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