Flame retardants for polypropylene based on lignin

被引:164
作者
De Chirico, A
Armanini, M
Chini, P
Cioccolo, G
Provasoli, F
Audisio, G
机构
[1] CNR, Ist Studio Macromol, I-20133 Milan, Italy
[2] Ctr Sperimentale Volo, AM, I-00040 Pomezia, RM, Italy
关键词
lignin; flame retardant; PP; dynamic mechanical analysis; thermogravimetry; cone calorimeter;
D O I
10.1016/S0141-3910(02)00266-5
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Lignin has been investigated as flame retardant for isotactic polypropylene (PP) by means of thermogravimetric analysis in nitrogen and cone calorimetry with incident heat flux exposure at 25 kW/m(2). Lignin has been used in synergism with aluminium hydroxide, poly(vinyl alcohol), melamine phosphate, monoammonium phosphate and ammonium polyphosphate. These flame retardants, based on lignin, increase the thermal degradation temperature, the combustion time and the char yield of PP, and decrease the rate of heat release and the weight loss rate during combustion. Dynamic mechanical analysis shows that lignin addition does not reduce elastic modulus E' of PP/lignin blends in the range from 30 to 100 degreesC in comparison with pure PP until 15% of lignin addition. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:139 / 145
页数:7
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