引用本文:
孙才英, 张转芳, 许苗军, 李斌, 张洪锋, 曹宜萌. MA-异氰酸酯改性APP及其在LLDPE中耐水性的评价[J]. 应用化学,
2007, 24(4): 434-438.
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.
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.
MA-异氰酸酯改性APP及其在LLDPE中耐水性的评价
摘要:
依次用密胺(MA)、2,4-甲苯二异氰酸酯(TDI)对聚磷酸铵(APP)进行改性,并分别应用于低密度线性聚乙烯(LLDPE)中。分别用APP在水中的溶解度变化,APP处理的LLDPE水浸后的极限氧指数(LOI)变化和磷含量变化评价了APP的耐水性。结果发现,改性后的APP在水中的溶解度减小,未改性APP的溶解度是0.368 0,MA-TDI-APP是0.212 3,减小了42.3%。改性后APP处理的LLDPE水浸后的LOI变化量减小,添加量均为30%时,未改性APP处理的LLDPE的LOI值降低了5.3%,AM-TDI-APP处理的LLDPE的LOI值降低了2.5%。改性后APP处理的LLDPE水浸后磷含量损失降低,不同APP添加量的LLDPE,未改性APP处理的磷含量损失均在6.5%以上,MA-TDI-APP处理的磷含量损失在4%以下。用扫描电子显微镜观察了改性前后APP与LLDPE的相容性,改性后的APP与LLDPE的相容性较好,MA-TDI改性的APP与LLDPE的相容性最好。
English
Surface-modified Ammonium Polyphosphate with Melamine-TDI and Evaluation of Its Water Resistance in LLDPE
Abstract:
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.
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Key words:
- APP
- / surface-modified
- / water resistance
- / compatibility
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