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Citation: SUN Cai-Ying, ZHANG Zhuan-Fang, XU Miao-Jun, LI Bin, ZHANG Hong-Feng, CAO Yi-Meng. Surface-modified Ammonium Polyphosphate with Melamine-TDI and Evaluation of Its Water Resistance in LLDPE[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 434-438. shu

Surface-modified Ammonium Polyphosphate with Melamine-TDI and Evaluation of Its Water Resistance in LLDPE

1.
Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials, Department of Chemistry, Northeast Forestry University, Harbin 150040

Corresponding author: LI Bin,
Received Date: 7 June 2006
Available Online: 15 August 2006
Fund Project: 黑龙江省教育厅科研项目资助(11513016) (11513016)

Ammonium polyphosphate(APP) which was surface-modified with melamine(MA) and 2,4-toluene diisocyanate(TDI) in turn was used as flame-retardant in linear low density polyethylene(LLDPE).Its water resistance was evaluated with its water-solubility and the changes of LOI and P content of the LLDPE after being immersed in water.The water-solubility of the surface-modified APP was reduced from 0.368 0 for unmodified-APP to 0.212 3 for MA-TDI-APP.The LOI and P content changes of the LLDPE treated with surface-modified APP were reduced after being immersed in water.When APP addition was 30%,the LOI change of the LLDPE was reduced 2.5% MA-TDI-APP and 5.3% with respect to unmodified-APP.The P copntent change of the LLDPE was more than 6.5% for unmodified-APP and under 4% for MA-TDI-APP.The compatibility of modified-APP was observed with SEM and the surface-modified APP had a better compatibility with LLDPE.
- APP,
- surface-modified,
- water resistance,
- compatibility
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